CN104237012B - Test device and method of testing for building structure glue bond tensile stress relaxation - Google Patents
Test device and method of testing for building structure glue bond tensile stress relaxation Download PDFInfo
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- CN104237012B CN104237012B CN201410474739.6A CN201410474739A CN104237012B CN 104237012 B CN104237012 B CN 104237012B CN 201410474739 A CN201410474739 A CN 201410474739A CN 104237012 B CN104237012 B CN 104237012B
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Abstract
The present invention provides a kind of test device for test architecture structure glue bonding tensile stress relaxation and method of testing, described test device includes fixed support, stretching device, test specimen, fixture and numeral dynamometer, and test specimen is releasably installed on fixture and accepts the pulling force from stretching device by fixture.The method of testing that the present invention provides includes test specimen dress configuration testing device good for maintenance, the stress size of the screw-button regulation test specimen of circumgyration stretch device, assay device entirety is positioned over outdoor heavy natural sunning field or chooses to install artificial ageing case and can survey the tensile stress under corresponding aging condition, aging after tensile stress with aging before tensile stress compared with i.e. can get tensile stress relaxation coefficient.The present invention can carry out building structure glue bond tensile stress relaxation after various senile experiment, can monitor the change of tensile stress in real time, and evaluation and life forecast for the aging durability of building structure glue bond provide means.
Description
Technical field
The invention belongs to construction structure glue technical field of measurement and test, be specifically related to a kind of for test architecture
The test device of structure glue bonding tensile stress relaxation and method of testing.
Background technology
Construction structure glue (hereinafter referred to as structure glue) is construction bonds material conventional in building, one
As glass in building curtain wall and door and window install, there is higher adhesion strength, can be by glass
Glass is bonded in metal attached frames securely, also has preferable ageing-resistant performance.At present, evaluate
The ageing-resistant performance of structure glue mainly by test bonding testing piece low temperature, high temperature, immersion and
The change of the tensile bond strength after the effect such as load cycle, characterizes structure glue by external environment condition
Ageing-resistant performance after factor effect, or by surely stretching cementation test, test specimen is stretched to freedom
After certain proportion length during state, the change observing its bond damage situation is resistance to always to evaluate it
Change performance, such as People's Republic of China's standard GB/T 13477.9-GB/T 13477.15.
But, these technology existing two limitation of existence: the problem of (1) bonding testing piece.Draw
Stretching cementation test or surely stretch cementation test and all use " H " type bonding testing piece, upper and lower two panels is
Glass, centre is the glue-line of one fixed width and thickness, and during test, pulling force is perpendicular to bonding interface,
There is some difference with the force way of structure glue in engineering reality for this.In Practical Project, knot
Structure glue is also conducted oneself with dignity by glass to be affected, and also will bear a shear stress at bonding interface；
(2) problem of monitoring continuously.Existing measuring technology can only obtain structure glue stand the most aging
The situation of change of all after date adhesive properties, obtained data are that interruption is discontinuous, for it
There is certain deficiency in the evaluation of resistance to ag(e)ing and life appraisal.
The viscoelasticity feature being had due to structure glue, needed for its Tensile produces a certain amount of deformation
Power or stress along with apply stress process be gradually lowered, this stress under constant strain
The phenomenon decayed in time, referred to as tensile stress relaxation.By continuous monitoring of structures glue in difference
Tensile stress relaxation under ageing environment, evaluates the tensile stress situation of change with ageing time,
Can the aging rice seed of the most scientifically evaluation structure glue.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art, it is provided that a kind of for test architecture knot
The test device of structure glue bond tensile stress relaxation and method of testing thereof.
The purpose of first aspect present invention is that providing a kind of draws for test architecture structure glue bonding
Stretch the test device of stress relaxation, including fixed support, stretching device, test specimen, fixture sum
Word dynamometer, above-mentioned fixed support is the framework that a front regards in hollow, including the most flat
The opposed base plate of row and top board, and be parallel to each other opposed and connect fixing via welding or bolt
Column between above-mentioned base plate and top board；Above-mentioned stretching device is screw-button, via above-mentioned spiral shell
The threaded rod of the component parts of spinner is fixed with above-mentioned foot screws；
Above-mentioned test specimen is releasably installed on fixture, comprising: a side regards gluing in C font
Knot base material test specimen, and a strip by bonding testing piece, above-mentioned be positioned at by bonding testing piece above-mentioned
The opening part of bonding substrates test specimen and its two ends are adhesively fixed via structure glue respectively in above-mentioned viscous
Knot base material test specimen, the width of the said structure glue at two ends, thickness is consistent with holding the most respectively；
Above-mentioned fixture includes: the relative front of the most opposed and opening depending on and side depending on being U-shaped
Upper grip and lower chuck and be respectively screw the pin being fixed on above-mentioned upper grip and lower chuck,
Above-mentioned upper grip is fixed via the pulling force sensor spiral of threaded rod with above-mentioned digital force-measuring instrument, on
State the lower chuck threaded rod via the component parts of above-mentioned screw-button solid with above-mentioned stretching device spiral
Fixed, above-mentioned bonding substrates test specimen is hung on above-mentioned upper grip, above-mentioned lower chuck via above-mentioned pin
It is hung on above-mentioned by bonding testing piece via above-mentioned pin；
Above-mentioned digital force-measuring instrument includes pulling force sensor, and the upper end of this pulling force sensor is via threaded rod
Fix with above-mentioned top board spiral, lower end is fixed with above-mentioned upper grip spiral via threaded rod；
Above-mentioned fixed support, stretching device, test specimen, fixture, above-mentioned threaded rod, above-mentioned pulling force pass
The respective centrage of sensor is positioned on same plumb line.
The above-mentioned test device using the present invention can Monitoring Data calculates continuously structure glue draw
Stretching stress relaxation Changing Pattern, durability and biometry for structure glue provide basis.
The purpose of second aspect present invention is that providing a kind of draws for test architecture structure glue bonding
Stretching the test device of stress relaxation, it is u-shaped and U-shaped that this fixture also includes that side regards
Upper cartridge clip and lower cartridge clip, above-mentioned upper cartridge clip and above-mentioned lower cartridge clip that opening is the most opposed are distinguished
It is made up of via at least two pins links two pieces of same sides of each leisure of opposed metallic plate, on
Stating bonding substrates test specimen and be hung on above-mentioned upper cartridge clip, above-mentioned upper cartridge clip is via pin and above-mentioned upper folder
Head connect, above-mentioned bucket of trapping be hung on above-mentioned by bonding substrates test specimen and via pin with above-mentioned under
Chuck connects.
The purpose of third aspect present invention is that providing a kind of draws for test architecture structure glue bonding
Stretch the method for testing of stress relaxation, use above-mentioned test device, comprise the following steps:
(1) making and the maintenance of test specimen are tested: first make test specimen, one C font of processing
Bonding substrates test specimen, the surface of this test specimen processes consistent with Practical Project processing mode, then adds
One strip of work by bonding testing piece, be then placed in above-mentioned bonding base by above-mentioned by bonding testing piece
The opening part of material test specimen and above-mentioned be adhesively fixed respectively via structure glue by the two ends of bonding testing piece
In above-mentioned bonding substrates test specimen, it is consequently formed test test specimen, the width of the said structure glue at two ends,
Thickness is consistent with holding the most respectively, and bond closely knit, bubble-free, and surface flushes,
Then carry out test piece maintenance process, the test specimen made is placed on temperature for (23 ± 2)
DEG C, relative humidity be (50 ± 5) % environment in maintenance 28 days；
(2) installation of test specimen is tested: use the test device that claim 1 or 4 is above-mentioned, first
The thread barrel of first circumgyration stretch device so that the slightly smaller than examination of the distance between upper grip, lower chuck
The whole height of part, is then connected test specimen with above-mentioned upper grip, lower chuck；
(3) carry out degradation, gather different time tensile stress values: test specimen will be installed
Above-mentioned test device is placed in typical atmospheric natural environment, the thread barrel of circumgyration stretch device,
Tension threaded rod so that above-mentioned test specimen by a pulling force, is remembered by data in vertical
Record instrument implementation record and display force value, after pulling force reaches design load and data stabilization, at the beginning of record
Beginning tensile stress values F0；
(4) reaching regulation ageing time, record reaches tensile stress values during regulation ageing time,
Terminate test；
(5) the bonding tensile stress relaxation coefficients R of construction structure glue is calculatedt: according to formula Rt=
Ft/F0Calculate the tensile stress relaxation coefficient after specific ageing time t, wherein:
RtFor the tensile stress relaxation coefficient after ageing time t,
F0For incipient extension stress value F0, unit be N,
FtFor the tensile stress values through ageing time t, unit is N.
RtSize represent that the performance of structure glue material opposing stress relaxation is good and bad, i.e. structure glue is anti-ageing
Change the quality of performance.
The purpose of fourth aspect present invention is that providing a kind of draws for test architecture structure glue bonding
Stretching the method for testing of stress relaxation, wherein, degradation uses ageing oven to carry out.
Advantages of the present invention effect is as follows:
1, the present invention implements the change of monitoring tensile stress by pulling force sensor and data logger,
Process of the test is the most uninterruptedly measured, and affects data fluctuations factor less, it is ensured that test result
Accuracy, repeatability and seriality.
2, can be positioned over after this assay device installs test specimen in atmospheric environment and carry out heavy natural sunning examination
Test, bear in some cycles the change of the adhesive property after natural aging for model configuration glue, because of
This present invention can carry out the test of heavy natural sunning aging bonding tensile stress relaxation.
3, this assay device can also assist and install different ageing ovens, is installed with test specimen by fixture
In ageing oven, it is achieved the test under the artificial ageing environment of difference.
4, the present invention provides test material preparation method and method of testing solve tradition test specimen only by hanging down
The problem of vertical pulling power, is more consistent with the practical engineering application operating mode of structure glue, test result pair
Meaning is had more resistance to ag(e)ing and the service life of evaluation structure glue.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the test device of the present invention；
Fig. 2 be the present invention test device in the structural representation of test specimen；
Fig. 3 be the present invention test device in fixture via the schematic diagram of cartridge clip and test specimen assembling, Fig. 3
(a) be front view, (b) of Fig. 3 is side view；
Fig. 4 be the present invention test device in the schematic diagram that directly assembles with test specimen of fixture, Fig. 4's
A () is front view, (b) of Fig. 4 is side view；
Fig. 5 is the structural representation of the test device with environmental cabinet of the present invention；
Fig. 6 is the flow chart of steps of the method for testing of the present invention.
Main Reference Numerals illustrates:
1-fixed support, 101-base plate, 102-column, 103-top board, 2-stretching device, 201-spiral shell
Stricture of vagina cylinder, 202,203,5,7-threaded rod, 3-structure glue bonding testing piece, 301-C type bonding base
Material test specimen, 302-, by bonding testing piece, 303-structure glue, 4 fixtures, 401-upper grip, presss from both sides under 402-
Head, 403-pin, the upper cartridge clip of 404-, cartridge clip under 405-, 6-digital force-measuring instrument, 601-pulling force passes
Sensor, 602-data wire, 603-data logger, 8-ageing oven, 801-ageing oven running-on, 802-
Ageing oven bearing support.
Detailed description of the invention
Referring to the drawings, in conjunction with specific embodiments, the present invention is described in detail.The present invention
Figure of description in order to be further appreciated by the present invention, the illustrative examples of the present invention and saying
Bright for explaining the present invention, it is not intended that limitation of the invention.
Present invention firstly provides a kind of test dress for testing structure glue bonding tensile stress relaxation
Put.As it is shown in figure 1, this test device includes: fixed support 1, stretching device 2, structure are gluing
Knot test specimen (hereinafter referred to as test specimen) 3, fixture 4 and numeral dynamometer 6, wherein, fixed support 1,
Stretching device 2, fixture 4 and numeral dynamometer 6 are the most mutual via threaded rod 202,203,5,7
Connecting, test specimen 3 is removably mountable to fixture 4, and digital force-measuring instrument 6 includes pulling force sensor 601
With via the connected data logger of data wire 602 603, stretching device 2, test specimen 3, folder
The centrage of tool 4, pulling force sensor 601 and above-mentioned threaded rod 202,203,5,7 is positioned at same
On one plumb line.
In more detail, as it is shown in figure 1, fixed support 1 includes: the base plate 101 being parallel to each other opposed
With top board 103 and be parallel to each other opposed and via welding or bolt be connected and fixed on base plate 101
And two root posts 102,102 between top board 103, being consequently formed a front view is square shape
Framework.Wherein, base plate 101, top board 103 and two root posts 102,102 mutually can be by welderings
Connect or bolt connects fixing, be consequently formed an entirety.
Stretching device 2 is screw-button, and for test specimen 3 is imposed tensile force, it includes thread barrel 201
Be respectively screw the threaded rod 203,202 being connected to this thread barrel upper/lower terminal.Stretching device 2
One end fix via base plate 101 spiral of threaded rod 202 with fixed support 1, here, screw thread
Bar 202 be the component parts of stretching device 2 have concurrently again stretching device 2 is connected with base plate 101 solid
Fixed function.The other end of stretching device 2 is via lower chuck 402 spiral shell of threaded rod 203 with fixture 4
Rotation connects fixing, and similarly, herein, threaded rod 203 is the component parts of stretching device 2
Have concurrently again and stretching device 2 is connected fixing function with lower chuck 402.The spiral shell of circumgyration stretch device 2
Stricture of vagina cylinder 201, can realize applying test specimen 3 tensile stress.
As in figure 2 it is shown, test specimen 3 is the test specimen for testing structure glue bonding tensile stress relaxation,
Including lateral plan be C font bonding substrates test specimen (hereinafter referred to as base material test specimen) 301,
With a strip by bonding testing piece 302, strip be positioned at C word by bonding testing piece 302
The opening part of the base material test specimen 301 of shape, its two ends via structure glue 303 respectively with base material test specimen
301 are adhesively fixed, the structure glue 303 being adhesively fixed with base material test specimen 301 at above-mentioned two ends
Width, height and thickness keep consistent respectively, be consequently formed test specimen 3, structure glue 303 is permissible
It it is structural silicone adhesive.
Fig. 3 is the fixture 4 schematic diagram via cartridge clip with test specimen 3 assembling, and (a) of Fig. 3 is dress
The front view joined, (b) of Fig. 3 is the side view of assembling.As it is shown on figure 3, fixture 4 in order to
Test specimen 3 is installed, comprising: the most opposed and front that opening is relative regards with side depending on being U
The upper grip 401 of font and lower chuck 402；The reverse side of the most opposed and opening is considered as U
The upper cartridge clip 404 of font and lower cartridge clip 405；And by upper and lower chuck 401,402 and upper,
The pin 403 that lower cartridge clip 404,405 is connected respectively with test specimen 3.Upper grip 401 is via screw thread
Bar 5 is connected with the lower end of pulling force sensor 601.Wherein, upper and lower chuck 401,402 is permissible
Prepared by metal materials such as low-carbon alloy steel, medium carbon steel, structural alloy steels；Upper and lower cartridge clip 404,
405 are respectively two pieces of opposed metallic plates, and in the present embodiment, the wall thickness of this metallic plate is
10mm, material is metal alloy, it is ensured that do not occur substantially to deform in drawing process.These two pieces
The same end of each leisure of opposed metallic plate separates certain intervals via at least two pins and links, from
And form two sides and be considered as the upper and lower cartridge clip of U-shaped.The size of upper and lower chuck with
And the size of upper and lower cartridge clip to be suitable for clamping test pieces 3 be suitable.As it is shown on figure 3, examination
Part 3 is connected with upper and lower chuck via upper and lower cartridge clip, specifically: tried by the base material of test specimen 3
Part 301 is placed between its two pieces of metallic plates in the way of being hung on upper cartridge clip 404, upper cartridge clip 404
It is connected with upper grip 401 via pin 403；By lower cartridge clip 405 to be hung on the quilt of test specimen 3
The mode of bonding testing piece 302 places it between two pieces of metallic plates of lower cartridge clip 405, lower cartridge clip
405 are connected with lower chuck 402 via pin 403, and so, test specimen 3 is via upper and lower set clamping connection
By Uniform Tension load.
It addition, as shown in Figure 4, it is also possible to do not use upper and lower cartridge clip 404,405 and by upper,
Lower chuck 401,402 is directly connected with test specimen 3 respectively.(a) of Fig. 4 is test specimen 3 and folder
The front view of tool 4 assembling, (b) of Fig. 4 is side view.As shown in Figure 4, base material test specimen 301
It is placed in the U-shaped recess of upper grip 401, and is hung on upper grip 401 via pin 403,
Similarly, it is placed in the U-shaped recess of lower chuck 402 by bonding testing piece 302, lower chuck 402
It is hung on by bonding testing piece 302 via pin 403.Thus, test specimen 3 accepts via above-mentioned pin
Pulling force, so can make overall structure more succinct.
As it is shown in figure 1, pulling force sensor 601 collectively constitutes with data wire 602, data logger 603
A set of digital force-measuring instrument 6, the upper/lower terminal of pulling force sensor 601 is respectively via threaded rod 7 and spiral shell
Rasp bar 5 is connected fixing with the top board 103 of fixed support 1 and upper fixture 401 respectively, data record
Instrument 603 is fixed in two columns 102,102 of fixed support 1, pulling force sensor 601
One end electrically connect with data logger 603 via data wire 602.Digital force-measuring instrument 6 and its pulling force
Sensor 601 can need to select according to test, and in the present invention, model selected by digital force-measuring instrument 6
For the digital force-measuring instrument of SH-50K, pulling force sensor 601 selects CFBLS-1 type pulling force sensor,
Sensitivity is 0.03.Manually rotate thread barrel 201 and fixture 4 is applied tensile force, this tensile force
Digital force-measuring instrument 6 is passed to via threaded rod.
The test device of the present invention could be applicable to structure glue bonding accelerated aging test, is achieved in
Test under the artificial ageing environment of difference.Fig. 5 is the test device with ageing oven of the present invention
Structural representation.As it is shown in figure 5, can be by ageing oven 8 via metal supporting parts 802
It is connected fixing with two columns 102,102 of fixed support 1 bolt respectively, and keeps stable, examination
Part 3 and fixture 4 are built in ageing oven 8.Ageing oven 8 can be selected for high/low temperature circulation general on market
Proof box circulates degradation, the top of this ageing oven 8 and the center of bottom for high/low temperature
Having ageing oven running-on 801, it is simple to threaded rod movement in ageing oven, running-on position should
Keep motion good and seal.Other parts and connected mode are all identical with Fig. 1, omit weight here
Multiple explanation.
The present invention also provides for a kind of test for test architecture structure glue bonding tensile stress relaxation
Method, this method of testing drives the lower chuck 402 of fixture 4 downward by using stretching device 2
Fang Yidong, and upper grip 401 remains stationary as, so at structure glue 303 and the base material of test specimen 3
Test specimen 301, at the adhesive surface of bonding testing piece 302, produced the comprehensive work of tensile force and shearing force
With, utilize digital force-measuring instrument 6 to draw to monitor test specimen 3 different time under different aging conditions
Stretch the change of stress value, such that it is able to calculate the tensile stress relaxation of structure glue.The inventive method
Fairly simple, practical, reliable test result, representative.
Fig. 6 is the flow chart of steps of the method for testing of the present invention.As shown in Figure 6, this method of testing
Use above-mentioned test device, realize especially by following steps:
Step one (S1): the making of test test specimen and maintenance.
First making test specimen, the base material test specimen 301 (Fig. 2) of one C font of processing, this base material tries
The surface of part processes consistent with Practical Project processing mode；Being tried by bonding of one strip of processing
Part 302, is placed on the opening part of C font base material test specimen 301, and two ends are via structure glue 303
It is adhesively fixed with base material test specimen 301 respectively, is consequently formed test specimen 3.Two ends bonding structure glue
Width, height and the thickness of 303 keeps consistent respectively, and bond closely knit, bubble-free, and surface flushes.
In the present embodiment, the cross section by bonding testing piece 302 of strip is 10mm × 10mm's
Square, the thickness of structure glue 303 is 6mm～12mm.Before test, first test specimen 3 is carried out
Maintenance processes, the test specimen 3 made is positioned over temperature be (23 ± 2) DEG C, relative humidity be
Maintenance 28 days in the standard environment of (50 ± 5) %.
Step 2 (S2): the installation of test test specimen.
Use the above-mentioned test device for test architecture structure glue bonding tensile stress relaxation, first
Rotate the thread barrel 201 of above-mentioned stretching device 2 so that between upper grip 401, lower chuck 402
Distance be slightly smaller than the whole height of test specimen 3, then by test specimen 3 via pin 403 directly with
Upper grip 401, lower chuck 402 connect, or by test specimen 3 via upper cartridge clip 404 and lower cartridge clip
405 it is connected with upper grip 401, lower chuck 402 (Fig. 3,4).
Step 3 (S3): carry out degradation, implements to gather different time tensile stress values.
Test device with test specimen 3 is integrally placed in typical atmospheric environment carry out heavy natural sunning
Degradation.The thread barrel 201 of circumgyration stretch device 2, thus tension threaded rod 202 and screw thread
Bar 203 so that test specimen 3 is by a pulling force in vertical, and this pulling force passes through digital force-measuring
The pulling force sensor 601 of instrument 6 passes to data logger 603 via data wire 602, by data
Monitor 603 implementation record and display force value, treat that pulling force reaches design load and data logger 603
After the value of thrust data stabilization of display, record incipient extension stress value F0, digital force-measuring instrument and its
Pulling force sensor can need to select according to test, in the present invention, and digital force-measuring instrument 6 selection type
Number being the digital force-measuring instrument of SH-50K, pulling force sensor 601 selects CFBLS-1 type pulling force to pass
Sensor, sensitivity is 0.03.
China's typical air heavy natural sunning field have with moist climate be representational Qionghai be exposed to the sun field,
Cold climate is that representational Mo River is exposed to the sun field and dry hot climate is to be exposed to the sun in representational Turfan
, and it is distributed in other atmospheric environment heavy natural sunning fields of various places.Being exposed to the sun test site can basis
Need to select.
In order to carry out degradation, it is also possible in test specimen region, i.e. test specimen 3 is with fixture 4 around
Installing an ageing oven 8, manual adjustment degradation environment, under record continuous ageing experimental condition
Tensile stress values, and provide stress-time changing curve.Concrete force method and data acquisition
Methods etc. are identical with above-mentioned steps three, repeat no more here.
Step 4 (S4): reach regulation ageing time, answering when record reaches regulation ageing time
Force value, terminates test.
Along with the increase of ageing time, tensile stress values changes, and data logger 603 is permissible
Recording the situation of change of value of thrust continuously, when have passed through ageing time t, reaching regulation ageing time
Time, record size F of the tensile stress values of this time pointt, terminate test.
Step 5 (S5): calculate the bonding tensile stress relaxation coefficients R of construction structure gluet。
The tensile stress relaxation coefficient after specific ageing time t is calculated according to formula (1), it may be assumed that
Rt=Ft/F0 (1)
In formula,
RtFor the tensile stress relaxation coefficient after ageing time t；
F0For incipient extension stress value F0, unit is N；
FtFor the tensile stress values through ageing time t, unit is N.
Ft/F0Ratio be the tensile stress relaxation coefficients R after specific ageing time tt, this is
The size of number represents that the performance of structure glue material opposing stress relaxation is good and bad, i.e. structure glue aging resistance
The quality of performance.RtThe biggest, show that the performance of structure glue opposing stress relaxation is the best, RtIt is the least,
Show that the performance of structure glue opposing stress relaxation is the poorest.The knot calculated according to continuous Monitoring Data
Structure glue tensile stress relaxation Changing Pattern, durability and biometry for structure glue provide basis.
Embodiment 1: tested glass and the stress relaxation coefficient of fluorocarbon-sprayed aluminum alloy bonding base material
Test specimen: use glass and by the fluorocarbon-sprayed aluminium alloy of bonding substrates, according to step one (S1)
Preparation and maintenance test specimen, test specimen is connected with fixture via upper and lower cartridge clip.
Wherein, base material test specimen use fluorocarbon-sprayed aluminum alloy bonding base material, cross section be 12mm ×
10mm；Glued test specimen is glass, a size of 100mm × 12mm × 5mm；
Structure glue is: double-component structural silicone adhesive, adhesive surface a size of: 12mm × 5mm,
Incipient extension power F0For: 200N；Aging condition is: laboratory normal temperature environment is placed naturally,
Temperature be (23 ± 2) DEG C, relative humidity be (50 ± 5) %；Ageing time is: 7 days,
The result of test: stretching force value F recorded after 7 daystFor 120N, the result stretching of evaluation
Stress relaxation coefficient Rt=Ft/F0=120N/200N=0.6.
Embodiment 2: tested glass and the stress relaxation coefficient of fluorocarbon-sprayed aluminum alloy bonding base material
Using ageing oven, other condition is with embodiment 1.
Identical test specimen, in being placed on the ageing oven that temperature is 40 DEG C after aging 7 days, record
Stretching force value FtFor 30N, tensile stress relaxation coefficient the most at this moment reduces, for Rt=
Ft/F0=30N/200N=0.15.It can thus be seen that structure glue is made at high temperature ageing-stress coupling
Under the conditions of with, its internal cohesiveness declines.
The test device of the present invention and method of testing can be additionally used in the stretching of other materials that are bonded and sealed
Stress relaxation is tested, such as building sealant etc..
Claims (9)
1. for a test device for test architecture structure glue bonding tensile stress relaxation, including: fixing
Frame, stretching device, test specimen, fixture and numeral dynamometer, it is characterised in that:
Described fixed support is the framework that a front regards in hollow, including the opposed base plate that is parallel to each other
With top board, and be parallel to each other opposed and via welding or bolt be connected and fixed on described base plate and top board
Between column；
Described stretching device is screw-button, via threaded rod and the described end of the component parts of described screw-button
Plate spiral is fixed；
Described test specimen is releasably installed on fixture, comprising: a side regards the bonding in C font
Base material test specimen, and a strip by bonding testing piece, described be positioned at described bonding base by bonding testing piece
The opening part of material test specimen and its two ends are adhesively fixed in described bonding substrates test specimen respectively via structure glue,
The width of described structure glue at two ends, thickness are consistent with holding the most respectively；
Described fixture includes: the relative front of the most opposed and opening depending on and side depending on being U-shaped
Upper grip and lower chuck and be respectively screw the pin being fixed on described upper grip and lower chuck, described
Upper grip is fixed via the pulling force sensor spiral of threaded rod with described digital force-measuring instrument, described lower chuck
Fix with described stretching device spiral via the threaded rod of the component parts of described screw-button, described bonding
Base material test specimen is hung on described upper grip via described pin, and described lower chuck is hung via described pin
In described by bonding testing piece；
Described digital force-measuring instrument includes pulling force sensor, and the upper end of this pulling force sensor is via threaded rod and institute
State that top board spiral is fixed, lower end is fixed with described upper grip spiral via threaded rod；
Described fixed support, stretching device, test specimen, fixture, described threaded rod, described pulling force sensor
Respective centrage be positioned on same plumb line.
2. the test for test architecture structure glue bonding tensile stress relaxation as claimed in claim 1
Device, it is characterised in that: described upper grip and described lower chuck selected from low-carbon alloy steel, medium carbon steel,
One in structural alloy steel.
3. the test for test architecture structure glue bonding tensile stress relaxation as claimed in claim 1
Device, it is characterised in that: described structure glue is structural silicone adhesive.
4. as claimed any one in claims 1 to 3 should for the bonding stretching of test architecture structure glue
The test device that power is lax, it is characterised in that: described fixture also includes that side regards u-shaped and U
Upper cartridge clip and lower cartridge clip, described upper cartridge clip and described lower cartridge clip that the opening of font is the most opposed divide
It is not made up of via at least two pins links two pieces of same sides of each leisure of opposed metallic plate, described
Bonding substrates test specimen is hung on described upper cartridge clip, and described upper cartridge clip is connected with described upper grip via pin,
Described bucket of trapping is hung on and described is connected with described lower chuck by bonding substrates test specimen and via pin.
5. as claimed any one in claims 1 to 3 should for the bonding stretching of test architecture structure glue
The test device that power is lax, it is characterised in that: also including ageing oven, this ageing oven is via metal support
Portion links, in the top of this ageing oven and bottom with described support bracket fastened two described upstanding studs
It is built-in that heart position offers the ageing oven running-on that threaded rod moves, described test specimen and described fixture respectively
In this ageing oven.
6. the test for test architecture structure glue bonding tensile stress relaxation as claimed in claim 4
Device, it is characterised in that: also including ageing oven, this ageing oven is fixing with described via metal support portion
Two described upstanding studs of support link, and the top of this ageing oven and the center of bottom are opened respectively
It is provided with the ageing oven running-on that threaded rod moves, described test specimen and described fixture to be built in this ageing oven.
7., for a method of testing for test architecture structure glue bonding tensile stress relaxation, its feature exists
In: use described in claim 1 or 4 for test architecture structure glue bonding tensile stress relaxation
Test device, comprises the following steps:
(1) making and the maintenance of test specimen are tested: first make test specimen, gluing of one C font of processing
Knot base material test specimen, the surface of this test specimen processes consistent with Practical Project processing mode, then processing one
Strip by bonding testing piece, be then placed in opening of described bonding substrates test specimen by described by bonding testing piece
At Kou and described be adhesively fixed respectively in described bonding substrates via structure glue by the two ends of bonding testing piece
Test specimen, is consequently formed test test specimen, the width of described structure glue at two ends, thickness and protect the most respectively
Holding consistent, bond closely knit, bubble-free, and surface flushes,
Then carry out test piece maintenance process, the test specimen made is placed on temperature be (23 ± 2) DEG C,
Relative humidity be (50 ± 5) % environment in maintenance 28 days；
(2) installation of test specimen is tested: use the test device described in claim 1 or 4, first revolve
Turn the thread barrel of stretching device so that the distance between upper grip, lower chuck is slightly smaller than the entirety of test specimen
Highly, then test specimen is connected with described upper grip, lower chuck；
(3) carry out degradation, gather different time tensile stress values: will be provided with described in test specimen
Test device is placed in typical atmospheric natural environment, and the thread barrel of circumgyration stretch device strains screw thread
Bar so that described test specimen in vertical by a pulling force, by data logger implementation record
With display force value, after pulling force reaches design load and data stabilization, record incipient extension stress value F0；
(4) reaching regulation ageing time, record reaches tensile stress values during regulation ageing time, knot
Bundle test；
(5) the bonding tensile stress relaxation coefficients R of construction structure glue is calculatedt: according to formula Rt=Ft/F0
Calculate the tensile stress relaxation coefficient after specific ageing time t, wherein:
RtFor the tensile stress relaxation coefficient after ageing time t,
F0For incipient extension stress value, unit be N,
FtFor the tensile stress values through ageing time t, unit is N.
8. the test for test architecture structure glue bonding tensile stress relaxation as claimed in claim 7
Method, it is characterised in that:
Described typical air natural environment is selected from: be that representational Qionghai is exposed to the sun field, cold with moist climate
Cold air wait for representational Mo River be exposed to the sun field, dry hot climate be representational Turfan be exposed to the sun field and point
Cloth one in other atmospheric environment heavy natural sunning fields of various places.
9., for a method of testing for test architecture structure glue bonding tensile stress relaxation, its feature exists
In: use described in claim 5 or 6 for test architecture structure glue bonding tensile stress relaxation
Test device, comprises the following steps:
(1) making and the maintenance of test specimen are tested: first make test specimen, gluing of one C font of processing
Knot base material test specimen, the surface of this test specimen processes consistent with Practical Project processing mode, then processing one
Strip by bonding testing piece, be then placed in opening of described bonding substrates test specimen by described by bonding testing piece
At Kou and described be adhesively fixed respectively in described bonding substrates via structure glue by the two ends of bonding testing piece
Test specimen, is consequently formed test test specimen, the width of the described structure glue at two ends, thickness and protecting the most respectively
Holding consistent, bond closely knit, bubble-free, and surface flushes,
Then carry out test piece maintenance process, the test specimen made is placed on temperature be (23 ± 2) DEG C,
Relative humidity be (50 ± 5) % environment in maintenance 28 days；
(2) installation of test specimen is tested: use the test device described in claim 5 or 6, first revolve
Turn the thread barrel of stretching device so that the distance between upper grip, lower chuck is slightly smaller than the entirety of test specimen
Highly, then described test specimen is connected with described upper grip, lower chuck；
(3) carry out degradation, gather different time tensile stress values: set the proving ring of ageing oven
Border, the thread barrel of circumgyration stretch device, strain threaded rod so that described test specimen is subject in vertical
To a pulling force, by data logger implementation record and display force value, treat pulling force reach design load and
After data stabilization, record incipient extension stress value F0；
(4) reaching regulation ageing time, record reaches tensile stress values during regulation ageing time, knot
Bundle test；
(5) the bonding tensile stress relaxation coefficients R of construction structure glue is calculatedt: according to formula Rt=Ft/F0
Calculate the tensile stress relaxation coefficient after specific ageing time t, wherein:
RtFor the tensile stress relaxation coefficient after ageing time t,
F0For incipient extension stress value, unit be N,
FtFor the tensile stress values through ageing time t, unit is N.
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