CN101545849A - Method for quantitatively analyzing material interface properties by combining non-destructive testing and definite element modelling - Google Patents
Method for quantitatively analyzing material interface properties by combining non-destructive testing and definite element modelling Download PDFInfo
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Abstract
本发明涉及一种用无损检测与有限元分析结合定量分析材料界面性能的方法。该方法通过加载复合材料，无损检测系统实时记录某一加载变量；同时有限元方法依据材料本征性质，模量、抗拉强度及泊松比等对应模拟试件加载全过程，找到与无损检测变量相对应的模拟状态，进而得到此模拟状态下的全面分析结果，包括纤维与基体间摩擦系数、应力、应变、反力等反映材料界面性能的各个物理量。无损检测高精度方法验证有限元分析的部分参量，而有限元分析提供更全面的分析结果。该方法灵敏度高、定量值可信，无需破坏粘接层。
The invention relates to a method for quantitatively analyzing material interface properties by combining non-destructive testing and finite element analysis. This method loads the composite material, and the nondestructive testing system records a certain loading variable in real time; at the same time, the finite element method simulates the whole loading process of the specimen according to the intrinsic properties of the material, such as modulus, tensile strength and Poisson's ratio, and finds and nondestructive testing The simulation state corresponding to the variables, and then obtain the comprehensive analysis results in this simulation state, including the friction coefficient between the fiber and the matrix, stress, strain, reaction force and other physical quantities that reflect the performance of the material interface. The non-destructive testing high-precision method verifies some parameters of the finite element analysis, and the finite element analysis provides more comprehensive analysis results. The method has high sensitivity, reliable quantitative value, and no need to destroy the adhesive layer.
Description
Technical field
The present invention relates to a kind of method of quantitatively analyzing material interface properties, particularly a kind of method that combines quantitatively analyzing material interface properties with Non-Destructive Testing with finite element analogy.
Background technology
Along with the continuous expansion of the industrial applicability of advanced materials such as types of functionality material, compound substance, the mechanical behavior at the interface of being made up of different materials more and more is subject to the people's attention.The joint portion of various structures and material, as combination interface of interlayer, metal/ceramic combination interface, function element and the bearing carrier of composite layer zoarium etc., mechanical behavior and even its functional performance of material or structural entity there is very important or even overriding influence; If adhesive linkage is bonding bad, crack, space appear, cause a serious accident most probably in the use.For compound substance, the interfacial energy that strengthens between body and the matrix plays the effect of coordinating matrix and strengthening body deformability, can be by the interface with the Stress Transfer of matrix to strengthening on the body, matrix and strengthen body and combination takes place by the interface, but the size of adhesion is wanted suitably, can not be excessive, can not be too little, adhesion is crossed conference descends composite material toughness, and adhesion is too small, do not have the effect of transmitting stress, ftractureing at the interface easily.Strengthen body, matrix and interface acting in conjunction can change toughness, anti-fatigue performance, creep-resistant property, shock resistance and other performances of compound substance.Therefore just be necessary the bonding interface performance is carried out quantitative test, whether be fit to practical application to determine this compound substance.The research worker has dropped into number of research projects in order to obtain the quantitative information of compound substance bonding force.Some propose directly firmly to destroy the size that the compound substance adhesive linkage obtains bonding force (Gao Xuemin etc. write, " and bonding and adhesive technology handbook, Sichuan science tech publishing house, 470-486).Though this method can obtain the quantitative value of bonding force, but can't reactive matrix material character and the distribution behavior of stress in matrix material thereof, can't tracking observation strengthen body and matrix material destructive process, and material is subjected to destroying fully, and therefore this method is not the method for desirable acquisition material adhesive performance.
Laser nondestructive measurement technology is a kind of high sensitivity, noncontact, effective monitoring mechanics of materials loads the method for behavior in real time, yet this method can only be seen the limited dimension of material, the analysis result of limited parameter can't be seen each physical quantity that reflects material character in the test specimen loading procedure.On the other hand, finite element method has shown its huge applications prospect in structure and mechanical analysis as a kind of cheap, aspect, whole audience analysis tool all sidedly.But some subtle differences in the foundation of finite element analysis model and the loading procedure promptly may cause the very big difference of analysis result, cause that the result's is insincere.
Summary of the invention
The purpose of this invention is to provide a kind of method that combines quantitatively analyzing material interface properties with Non-Destructive Testing with finite element analogy.
Behind the compound substance plus load that bonds together, because different matrix binding material and reinforcing material modulus, tensile strength, and the difference of the bonding strength between them, to produce inhomogenous deformation displacement around the interface, this variation and material character, adhesive property have direct relation.
As everyone knows, the laser speckle interferometry measuring technique is a kind ofly rough surface to be can't harm the technology of full-filled optical measurements (Robert K. ell husband etc. writes, " speckle measuring: principle and application ", China Machine Press, 58-80), owing to the speckle interference measuring technique has that structural approach is simple, the noncontact measurement of full field, light requirement is learned smooth surface, strong interference immunity can be used for outstanding advantages such as operating mode scene, be widely used in the measurement of each side such as displacement, strain.When body surface deformed, the displacement of the derivative of its displacement and displacement and space speckle had definite relation, and this determines that relation is to infer the foundation of body surface distortion according to measured speckle movement.Produce speckle field and corresponding phase size reduction mode by the twin-beam speckle interference, as follows:
In the formula, ψ is the various phases at random of mixing rough surface,
Be the one dimension phase change that thing light is produced.Because the laser speckle sequence chart that the modulation of sine function obtains will present with strip form.
In the formula,
For relative displacement changes, λ is an optical wavelength,
Be the displacement increment of loading direction, n is a fringe order, and size is out of shape in how much directly reflecting of striped.
Thus, the inventor uses the variable that lossless detection method records a certain loading procedure of material, and find with finite element method and to change identical correct emulation mode therewith, thereby obtain every physical parameter of exosyndrome material performance, comprise friction factor, stress, strain and counter-force etc. between fiber and matrix.
The method of using Non-Destructive Testing to combine quantitatively analyzing material interface properties with finite element analogy provided by the invention shown in Fig. 1 process flow diagram, in turn includes the following steps:
1) composite sample to be measured is held on the omnipotent puller system, loading is loaded in described testing sample, omnipotent puller system stretch described testing sample and real time record load and stretching displacement, laser speckle lossless detection method or holograph detection method write down the speckle bar graph or the hologram of described composite sample deformation to be measured simultaneously;
2) drawing process of composite sample to be measured application finite element software simulation steps 1), modulus, yield strength and Poisson ratio are set, adjust the coupling friction factor, obtain the different loads choppy in step, the distortion parameter tabulation in described different loads step is derived, the deflection of same coordinate point subtracts each other, be converted into the two-dimensional matrix value, draw the identical potentiometric map of fringe spacing value size with the speckle bar graph, obtain the emulation mode consistent, finish the quantitative test of described composite sample interface performance to be measured with experimental result.
In this method, lossless detection method is laser speckle lossless detection method or holograph detection method.The loading mode of load is that mechanics loads, heat loads or sound loads.The speed that loads load is 0.005mm/min～0.05mm/min, and required loading load is for can produce the load of the little distortion of 0.5～50 μ m, and this load can not damage material interface.
In the step 1), the real time record mode is that sequence is subtracted each other or phase size reduction mode uniformly-spaced; Accordingly, step 2) in, the method that described same position point displacement subtracts each other is subtracted each other or is uniformly-spaced subtracted each other for its corresponding sequence.In addition, for obtaining speckle image more clearly, in the time of can keeping deformation state to stablize, in reference light or thing light, introduce three steps, four steps or five step phase-shift phases by the piezoelectric micromotor displacement driver, change the phase contraposition phase of two relevant wavelength, and then find the solution and obtain the insensitive clear speckle stripe pattern of background, contrast and noise.Three steps, four steps or five step phase shift phase methods are to carry out according to the method in the following document: Self-marking phase-stepping electronic specklepattern interferometry (ESPI) for determining a phase map with least residues, M.J.Huang, Bo-Son Yun, Optics ﹠amp; Laser Technology, 2009,39 (1), 136-148.
Step 2) in, the tabulation of the distortion parameter in the different loads of derivation step is XYZ Work List at random, i.e. X, and the Y row correspond respectively to X, and Y position coordinate value, Z be listed ass corresponding to being out of shape big or small.The deflection of same coordinate position point is subtracted each other, obtain subtracting each other or uniformly-spaced subtract each other the distortion variable with the corresponding sequence of described step 1).For further obtaining potentiometric map, needing at random, Work List is converted into the regular grid matrix.It is to carry out according to the programming of the Kriging algorithm in the following document that X Y Z Work List at random is converted into grid matrix: Statistics and data analysis ingeology, Davis, John C., John Wiley; Sons, Inc.second edition, pp.383.
Composite sample to be measured is made up of matrix material and reinforcing material; Wherein, matrix material is thermoplastic resin or thermoset resin, be selected from polyolefin, polystyrene, polyamide, polyimide, polyester, polyoxymethylene, polycarbonate, poly-(methyl) acrylate, polyphenylene sulfide, polyphenylene oxide, polyethersulfone, polyetheretherketone, epoxy resin, any one in phenolics, polyurethane, silicones, silicon rubber, butadiene-styrene rubber, neoprene, butyl rubber, butadiene-acrylonitrile rubber and the EP rubbers or several arbitrarily potpourri that mixes with arbitrary proportion.Reinforcing material is carbon fiber, glass fibre, boron fibre, ceramic fiber, basalt fibre, carbon fibre precursor or aromatic polyamide fibre.
The length of above-mentioned composite sample to be measured is 50～200mm, and width is 5～50mm, and thickness is 0.5～5mm; The buried depth on described reinforcing material distance composite sample observation to be measured surface does not exceed sample surfaces, is 0.25～2.5mm; The embedment length of reinforcing material accounts for 10%～100% of composite sample total length to be measured; The embedding form of reinforcing material in composite sample to be measured is that fiber list bundle is embedding or lamella is embedding; Fiber list beam diameter is 0.3～0.7mm; Lamella length is 50～200mm, and width is 5～50mm, and thickness does not exceed described composite sample to be measured surface, is 0.2～1mm.
The method of using Non-Destructive Testing to combine quantitatively analyzing material interface properties with finite element analogy provided by the invention combines the high precision of Non-Destructive Testing, real-time advantage with the comprehensive advantage of finite element analysis, have the advantage of two kinds of methods concurrently.This method adopts the change in displacement under the laser speckle detection system whole audience record compound substance loaded condition, omnipotent puller system real time record pulling force size of while, therefore, not only can directly the be enhanced stressing conditions of body of this method, and can the real-time monitored fiber and matrix material carefully see destruction.This method has been owing to adopted the laser speckle optical detecting method, and is highly sensitive, can carry out harmless quantitative to adhesive property and detect, and need not to destroy fully compound interface.This method can be made quantitative detecting analysis to material adhesive, provides reliable foundation for whether compound substance is fit to actual the use.This method quantitative values highly sensitive, that record is reliable, can carry out harmless quantitative to interface performance and detect, and need not to destroy adhesive linkage.
Description of drawings
Fig. 1 combines the process flow diagram of the method for quantitatively analyzing material interface properties with finite element analogy for Non-Destructive Testing.
Fig. 2 is the laser speckle pick-up unit synoptic diagram under the composite material interface performance loaded condition.
Fig. 3 is the load-displacement curve of fibre reinforced composites.Dotted line corresponds to epoxy resin-carbon fiber sample; Solid line corresponds to silicon rubber-carbon fiber sample.
Fig. 4 is the laser specklegram of fibre reinforced composites real time record in drawing process.Wherein, Fig. 4 a corresponds to epoxy resin-carbon fiber sample; Fig. 4 b corresponds to silicon rubber-carbon fiber sample.
Fig. 5 is finite element analysis and the contrast of laser speckle experimental image.Wherein, Fig. 5 a corresponds to epoxy resin-carbon fiber sample; Fig. 5 b corresponds to silicon rubber-carbon fiber sample.
Fig. 6 is under the correct mode of finite element analysis, along the whole audience displacement potentiometric map of draw direction.Wherein, Fig. 6 a corresponds to epoxy resin-carbon fiber sample; Fig. 6 b corresponds to silicon rubber-carbon fiber sample.
Embodiment
The invention will be further described below in conjunction with specific embodiment, but the present invention is not limited to following examples.
The method of using Non-Destructive Testing to combine quantitatively analyzing material interface properties with finite element analogy provided by the invention, shown in Figure 1 as flow process, concrete implementation step is as follows:
1) white paint is sprayed on the testing sample surface, be held on after the drying on the omnipotent puller system;
2) with steady weighing apparatus speed load sample, omnipotent puller system real time record stretching displacement and load write down the speckle bar graph simultaneously;
Fig. 2 is the laser speckle pick-up unit synoptic diagram under the composite material interface performance loaded condition.Wherein, 1 is laser instrument, and 2 is charge-coupled image sensor (Charge Coupled Device), and 3 are charger (can be load device such as omnipotent puller system or thermal source), and 4 is computing machine, and 5 is the piezoelectric micromotor displacement driver.
3) use finite element software modeling interface drawing process, set modulus, yield strength and Poisson ratio etc., adjust the coupling friction factor, obtain the different loads choppy in step, simultaneously shift value is derived, application computer programs is subtracted each other and is obtained the potentiometric map consistent with the fringe spacing value;
4) adjust the Finite Element Method intrinsic parameters and find correct emulation mode with speckle bar graph experimental result, and obtain reflecting each physical parameter of interface performance, comprise friction factor, stress, strain or counter-force etc. between fiber and matrix.
The detection at embodiment 1, single bundle carbon-fibre reinforced epoxy resin composite material interface
Matrix material is that (the bisphenol A type epoxy resin model is E-51 to epoxy resin, hardening agent low-molecular-weight polyamide resin model is 651, Wuxi City A Erzi chemical industry company limited), strengthening body is single diameter 7 μ m, 1000 of every bundles, the carbon fibre tow of length 150mm (Dalian Xingke Carbon Fiber Co., Ltd).
This detection method is carried out according to following steps:
1) pours epoxy resin and hardening agent into 80 * 20 * 2mm by 10: 3 quality after than mixing
3The tetrafluoro mould in, a branch of carbon fiber is inserted wherein 1mm thickness place.The follow procedure curing that slowly heats up in baking oven: 60 ℃, 3 hours, 70 ℃, 3 hours, 80 ℃, 3 hours, 105 ℃, 3 hours, 120 ℃ kept 3 hours, and obtained golden yellow translucent batten until curing.Sample is taken out from mould, and white paint is sprayed on the surface, treats to be held on the omnipotent puller system after the white paint drying.With the steady weighing apparatus speed of 0.01mm/min this sample that stretches, omnipotent puller system real time record stretching displacement and load, CCD record speckle bar graph simultaneously.
Dotted line is depicted as the load-displacement curve of the used epoxy resin-carbon fibre composite of this embodiment among Fig. 3.Because epoxy resin matter is hard, modulus is big, and tight with the carbon fiber bonding, and load reaches 200N, and load-displacement curve is smoothly stable, does not still have tangible slippage.Laser speckle shown in Fig. 4 (a) uniformly-spaced subtracts each other figure (be 120s interval time) and reflects this phenomenon equally, and incremental deformation reaches unanimity in the constant speed drawing process.
2) use finite element Ansys10.0 software simulation interface tension process, it is 2.8E9 that the epoxy resin elastic modulus is set, and Poisson ratio is 0.44, and the fibre reinforcement modulus is 4E11, and Poisson ratio is 0.3, uses dichotomy adjustment coupling friction factor (initial range R
0=0.5, R
e=1.0), obtain the operation result in different loads step under arbitrary coupling friction co-efficient value; The distortion parameter tabulation in different loads step is derived, the tabulation of deriving is XYZ Work List at random, be X, the Y row correspond respectively to X, the Y position coordinate value, Z is listed as corresponding to the distortion size, and the deflection of same coordinate position point is subtracted each other, and obtains and the corresponding distortion variable list that uniformly-spaced subtracts each other of step 1).For further obtaining potentiometric map, Work List is converted into the regular grid matrix at random.It is to carry out according to the programming of the Kriging algorithm in the following document that X Y Z Work List at random is converted into grid matrix: Statistics and data analysis in geology, Davis, John C., John Wiley; Sons, Inc.second edition, pp.383.
After being converted into the two-dimensional matrix value, draw and the identical potentiometric map of fringe spacing value size, consistent with analog result until experimental result shown in Fig. 5 (a), binary search finishes, and the friction factor of this moment is 0.88.Fig. 6 (a) has further showed under the correct mode of finite element analysis, along the whole audience displacement potentiometric map of draw direction.Because fiber combine firmly with epoxy matrix, and matrix has very big modulus equally, and the same appearance of fiber is born very big load than strain greatly.Simultaneously, can also obtain more useful indicators from software analysis, as displacement deformation, tension, VonMise stress etc.
In the compound substance of selecting for use, matrix material is silicon rubber (GN512, the dimethyl siloxane catalysis addition of ethenyl blocking, Hong Kong advanced technology Industrial Co., Ltd), strengthening body is single diameter 7 μ m, 1000 of every bundles, the carbon fiber of the carbon fibre tow of length 150mm (Dalian Xingke Carbon Fiber Co., Ltd).
This detection method is carried out according to following steps:
1) silicon gel 5g is introduced into 80 * 20 * 2mm
3The tetrafluoro mould in, a branch of carbon fiber inserts wherein 1mm thickness place.The follow procedure sulfuration that slowly heats up in baking oven: 60 ℃, 3 hours, 70 ℃, 3 hours, 80 ℃, 3 hours, 105 ℃, 3 hours, 120 ℃ kept 3 hours, and obtained colourless translucent batten until sulfuration.Sample is taken out from mould, and white paint is sprayed on the surface, is held on the omnipotent puller system (3) after waiting to coat with lacquer drying.With the steady weighing apparatus speed stretching sample of 0.01mm/min, omnipotent puller system record stretching displacement and load, CCD real time record speckle bar graph simultaneously.
Solid line is depicted as the load-displacement curve of the used silicon rubber-carbon fibre composite of this embodiment among Fig. 3, because silicon rubber matter is soft, modulus is little, and not firm with the carbon fiber bonding, reaches 4N and promptly begins slippage, and power loads silicon rubber easy deformation down, overcome friction energy when the distortion aggravation acquires a certain degree, relative displacement will take place and reach a new relaxation balance state in fiber and silicon rubber, continue to stretch, deformed begins a new cycle again, thereby the cycle occurs repeatedly.Laser speckle shown in Fig. 4 (b) uniformly-spaced subtracts each other figure (be 120s interval time) and reflects this phenomenon equally, and the silicon rubber distortion is violent, and the cycle occurs repeatedly.
2) use finite element Ansys10.0 software simulation interface tension process, it is 7E6 that the silicon rubber elastic modulus is set, and Poisson ratio is 0.48, and the fiber reinforcement elastic modulus is 7E11, and Poisson ratio is 0.3, uses dichotomy adjustment coupling friction factor (initial range R
0=0.5, R
e=1.0), obtain the different loads choppy in step, simultaneously shift value is derived, same coordinate point deformation amount is subtracted each other, according to data being converted to the two-dimensional matrix value with embodiment 1 identical method, drawing and the identical potentiometric map of fringe spacing value size, shown in Fig. 5 (b), is 0.65 until the final experimental result friction factor consistent with analog result.Fig. 6 (b) further showed under the correct mode of finite element analysis, along the whole audience displacement potentiometric map of draw direction, because a little less than the silicon rubber matrix combines with fiber, and matrix modulus is little much than fiber, and deformation is more to be born by matrix.Further can obtain more useful indicators from software analysis, as displacement deformation, tension, VonMise stress etc.
The detection of embodiment 3, carbon fibre slice reinforced epoxy composite material interface
Matrix material is that (the bisphenol A type epoxy resin model is E-51 to epoxy resin, hardening agent low-molecular-weight polyamide resin model is 651, Wuxi City A Erzi chemical industry company limited), strengthening body is single diameter 7 μ m, 1000 of every bundles, the carbon fiber of length 150mm (Dalian Xingke Carbon Fiber Co., Ltd).
This detection method is carried out according to following steps:
1) after being mixed by the mass ratio of 10:3, epoxy resin and hardening agent pour 80 * 20 * 2mm into
3The tetrafluoro mould in, complete fiber is smooth with wound form, brush the thin layer epoxy resin prepolymer and be solidified into 100 * 20 * 0.2mm
3Behind the thin slice, 1mm thickness place carefully is placed in one.The follow procedure curing that slowly heats up in baking oven: 60 ℃, 3 hours, 70 ℃, 3 hours, 80 ℃, 3 hours, 105 ℃, 3 hours, 120 ℃ kept 3 hours, and obtained golden yellow translucent batten until curing.Sample is taken out from mould, and white paint is sprayed on the surface, is held on the omnipotent puller system after waiting to coat with lacquer drying.With the steady weighing apparatus speed stretching sample of 0.01mm/min, omnipotent puller system real time record stretching displacement and load, CCD record speckle bar graph simultaneously.
Because epoxy resin matter is hard, modulus is big, and with the carbon cloth bonding closely, load reaches that the curve of load does not still have tangible slippage in the 200N.Laser speckle uniformly-spaced subtracts each other figure (be 120s interval time) and obtains the parallel vertical striped, and the fringe spacing vary stable.
2) use finite element Ansys10.0 software simulation interface tension process, it is 2.8E9 that the epoxy resin elastic modulus is set, and Poisson ratio is 0.44, and the fibre reinforcement modulus is 4E11, and Poisson ratio is 0.3, uses dichotomy adjustment coupling friction factor (initial range R
0=0.5, R
e=1.0), obtain the different loads choppy in step, same coordinate point deformation amount is subtracted each other, according to data being converted to the two-dimensional matrix value with embodiment 1 identical method, drawing and the identical potentiometric map of fringe spacing value size, is 0.85 until the final experimental result friction factor consistent with analog result.The results shows, because fiber combine firmly with epoxy matrix, and matrix has very big modulus equally, and the same appearance of fiber is born very big load than strain greatly.Further, can also obtain more useful indicators from software analysis, as displacement deformation, tension, VonMise stress etc.
In the compound substance of selecting for use, matrix material is silicon rubber (GN512, the dimethyl siloxane catalysis addition of ethenyl blocking, Hong Kong advanced technology Industrial Co., Ltd), strengthening body is single diameter 7 μ m, a branch of 1000, the carbon fiber of the carbon fibre tow of length 150mm (Dalian Xingke Carbon Fiber Co., Ltd).
This detection method is carried out according to following steps:
1) 5g silicon gel is introduced into 80 * 20 * 2mm
3The tetrafluoro mould in, complete fiber is smooth with wound form, brushing the precuring of thin-layer silicon rubber resin becomes 100 * 20 * 0.2mm
3Behind the thin slice, 1mm thickness place carefully is placed in one.The follow procedure sulfuration that slowly heats up in baking oven: 60 ℃, 3 hours, 70 ℃, 3 hours, 80 ℃, 3 hours, 105 ℃, 3 hours, 120 ℃ kept 3 hours, and obtained colourless translucent batten until sulfuration.Sample is taken out from mould, and white paint is sprayed on the surface, is held on the omnipotent puller system (3) after waiting to coat with lacquer drying.With the steady weighing apparatus speed stretching sample of 0.01mm/min, omnipotent puller system record stretching displacement and load, CCD real time record speckle bar graph simultaneously.
Because silicon rubber matter is soft, modulus is little, and not firm with the carbon fiber bonding, reaches 4N and promptly begins slippage.The laser speckle constant duration subtracts each other figure (be 120s interval time) and obtains the parallel vertical striped, and fringe spacing changes violent, overcomes deformation energy when distortion acquires a certain degree, and fiber and silicon rubber generation relative displacement reach a new equilibrium state.Continue to stretch, deformed begins a new cycle, thereby spacing compactness-sparse-compact alternately deformation tendency occurs.
2) use finite element Ansys10.0 software simulation interface tension process, it is 7E6 that the silicon rubber modulus is set, and Poisson ratio is 0.48, and the fibre reinforcement modulus is 4E11, and Poisson ratio is 0.3, uses dichotomy adjustment coupling friction factor (initial range R
0=0.5, R
e=1.0), obtain the different loads choppy in step, simultaneously shift value is derived, same coordinate point deformation amount is subtracted each other, according to data being converted to the two-dimensional matrix value with embodiment 1 identical method, draw and the consistent potentiometric map of fringe spacing value, the friction factor when final experimental result is consistent with analog result is 0.64.The results shows, because a little less than the silicon rubber matrix combines with fiber, and matrix modulus is little much than fiber, and deformation is more to be born by matrix; Further can obtain more useful indicators from software analysis, as displacement deformation, tension, VonMise stress etc.
Claims (9)
1, a kind of method of using Non-Destructive Testing to combine quantitatively analyzing material interface properties with finite element analogy in turn includes the following steps:
1) composite sample to be measured is held on the omnipotent puller system, loading is loaded in described testing sample, omnipotent puller system stretch described testing sample and real time record drag load and stretching displacement numerical value write down the speckle bar graph or the hologram of described composite sample deformation to be measured simultaneously with laser speckle lossless detection method or holograph detection method;
2) use the drawing process that finite element software is simulated composite sample to be measured in the described step 1), modulus, yield strength and Poisson ratio are set, adjust the coupling friction factor, obtain the different loads choppy in step, distortion parameter tabulation in the described different loads step sex change figure is derived, the deflection of same coordinate point subtracts each other, draw and the big or small identical potentiometric map of the fringe spacing value of speckle bar graph after being converted into the two-dimensional matrix value, obtain the emulation mode consistent, finish the quantitative test of described composite sample interface performance to be measured with experimental result.
2, method according to claim 1 is characterized in that: described composite sample to be measured is made up of matrix material and reinforcing material;
Described matrix material is thermoplastic resin or thermoset resin; Described reinforcing material is carbon fiber, glass fibre, boron fibre, ceramic fiber, basalt fibre, carbon fibre precursor or aromatic polyamide fibre.
3, method according to claim 2, it is characterized in that: described matrix material is selected from polyolefin, polystyrene, polyamide, polyimide, polyester, polyoxymethylene, polycarbonate, poly-(methyl) acrylate, polyphenylene sulfide, polyphenylene oxide, polyethersulfone, polyetheretherketone, epoxy resin, any one in phenolics, polyurethane, silicones, silicon rubber, butadiene-styrene rubber, neoprene, butyl rubber, butadiene-acrylonitrile rubber and the EP rubbers or several arbitrarily potpourri that mixes with arbitrary proportion.
4, according to the arbitrary described method of claim 1-3, it is characterized in that: in the described step 1), described real time record pattern is sequence phase size reduction mode or phase size reduction mode uniformly-spaced; Described step 2) in, the method that described same position point displacement subtracts each other is corresponding with step 1), for sequence is subtracted each other or uniformly-spaced subtracted each other.
5, according to the arbitrary described method of claim 1-4, it is characterized in that: in the described step 1), the loading mode of load is that mechanics loads, heat loads or sound loads.
6, according to the arbitrary described method of claim 1-5, it is characterized in that: the speed of described loading load is 0.005mm/min～0.05mm/min, and described loading load is for can produce the load of the little distortion of 0.5～50 mum wavelength.
7, according to the arbitrary described method of claim 1-6, it is characterized in that: in the described step 1), obtaining more clearly, the method for speckle image is:
Keeping under the stable condition of described composite sample deformation state to be measured, in reference light or thing light, introduce three steps, four steps or five step phase-shift phases by the piezoelectric micromotor displacement driver, change the phase contraposition phase of two relevant wavelength, find the solution and obtain described speckle image more clearly.
8, according to the arbitrary described method of claim 2-7, it is characterized in that: the length of described composite sample to be measured is 50～200mm, and width is 5～50mm, and thickness is 0.5～5mm;
The buried depth on described reinforcing material distance composite sample observation to be measured surface does not exceed sample surfaces, is 0.25～2.5mm, and the embedment length of described reinforcing material accounts for 10%～100% of composite sample total length to be measured.
9, according to the arbitrary described method of claim 2-8, it is characterized in that: the embedding form of described reinforcing material in described composite sample to be measured is that fiber list bundle is embedding or lamella is embedding;
Described fiber list beam diameter is 0.3～0.7mm; Described lamella length is 50～200mm, and width is 5～50mm, and thickness does not exceed described composite sample to be measured surface, is 0.2～1mm.
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