CN113958653A - Composite material plate and metal plate lap joint energy absorption device - Google Patents
Composite material plate and metal plate lap joint energy absorption device Download PDFInfo
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- CN113958653A CN113958653A CN202111232520.1A CN202111232520A CN113958653A CN 113958653 A CN113958653 A CN 113958653A CN 202111232520 A CN202111232520 A CN 202111232520A CN 113958653 A CN113958653 A CN 113958653A
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- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 239000002184 metal Substances 0.000 title claims abstract description 20
- 238000010521 absorption reaction Methods 0.000 title claims description 37
- 239000000463 material Substances 0.000 claims abstract description 8
- 230000003139 buffering effect Effects 0.000 claims description 7
- 230000006378 damage Effects 0.000 description 21
- 238000000034 method Methods 0.000 description 18
- 230000008569 process Effects 0.000 description 18
- 238000001125 extrusion Methods 0.000 description 15
- 230000006835 compression Effects 0.000 description 14
- 238000007906 compression Methods 0.000 description 14
- 238000006073 displacement reaction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000005457 optimization Methods 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2224/00—Materials; Material properties
- F16F2224/005—Combined materials of same basic nature but differing characteristics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2224/00—Materials; Material properties
- F16F2224/02—Materials; Material properties solids
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Abstract
本发明公开一种复合材料板与金属板搭接吸能装置，包括第一板和第二板，所述第一板位于所述第二板的上方，所述第一板与所述第二板间通过紧固组件连接；所述第一板上开设有阶梯式凹槽，所述紧固组件位于所述阶梯式凹槽内，所述阶梯式凹槽的底部用来缓冲所述紧固组件的移动，所述紧固组件贯穿所述第二板上和所述阶梯式凹槽底部的通孔，所述紧固组件与所述阶梯式凹槽和所述通孔的内侧壁之间设置有间隙；所述紧固组件的头部与所述阶梯式凹槽之间设置有垫片。本发明可以充分使用材料，并且吸能结构重量小、吸能效率高。
The invention discloses an energy-absorbing device for overlapping a composite material plate and a metal plate, comprising a first plate and a second plate, the first plate is located above the second plate, the first plate and the second plate The plates are connected by a fastening component; the first plate is provided with a stepped groove, the fastening component is located in the stepped groove, and the bottom of the stepped groove is used to buffer the fastening The movement of the assembly, the fastening assembly penetrates through the second plate and the through hole at the bottom of the stepped groove, between the fastening assembly and the inner side wall of the stepped groove and the through hole A gap is provided; a gasket is provided between the head of the fastening component and the stepped groove. The present invention can fully use materials, and the energy-absorbing structure has low weight and high energy-absorbing efficiency.
Description
Technical Field
The invention relates to the field of impact energy absorption structures, in particular to a lap joint energy absorption device for a composite material plate and a metal plate.
Background
In the processes of vehicle collision, airplane crash, forced landing of a helicopter, landing of an outer space detector and the like, because the equipment is heavy in weight and high in impact speed, the impact load effect can be realized, in order to ensure the safety of members, the structural safety and the normal work of electrical equipment, the impact kinetic energy is dissipated through plastic deformation, fracture damage and the like of a high-efficiency energy-absorbing structure/material, the impact process is delayed, the impact load peak value is reduced, and the impact resistance of the structure is improved.
The fiber reinforced composite material laminated plate has the characteristics of high specific modulus and high specific strength, and is widely applied to the fields of automobiles, ships and aerospace. And the composite material can absorb a large amount of energy in the crushing process, has light weight, has the characteristic of high specific energy absorption, and is suitable for being used as an energy absorption device, but the existing composite material energy absorber cannot be used as a structural element at the same time. Therefore, the composite material structural element is designed to serve as a buffering energy absorption device, and the important significance is achieved for improving the crashworthiness of the structure.
The conventional composite material laminated plate and metal are mainly connected by mechanical connection, adhesive connection and mixed connection. However, the design of mechanical connection is often too conservative, and the joint is not damaged or the damage displacement is very small in the impact process, so that the structural material is not fully used, the energy absorption structure is heavy, and the energy absorption efficiency is low. The stepped groove design around the laminate hole at the bolted joint thus reduces the initial failure driving force of the laminate, and the stepped groove design allows failure to terminate at the maximum thickness, preventing catastrophic structural failure, i.e., failure displacement and absorbed impact energy is controllable. And can be designed to absorb energy in only one direction (either the tensile or compressive) or both, depending on the load conditions in which the structure is subjected.
Disclosure of Invention
The invention aims to provide a composite material plate and metal plate lapping energy absorption device to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a composite plate and metal plate lapping energy absorption device, which comprises a first plate and a second plate, wherein the first plate is positioned above the second plate, and the first plate is connected with the second plate through a fastening assembly;
the first plate is provided with a stepped groove, the fastening component is positioned in the stepped groove, the bottom of the stepped groove is used for buffering the movement of the fastening component, the fastening component penetrates through the through holes in the second plate and the bottom of the stepped groove, and a gap is formed between the fastening component and the inner side walls of the stepped groove and the through holes; a gasket is arranged between the head of the fastening component and the stepped groove.
Preferably, fastening components adopts the bolt, cascaded recess includes first recess and second recess, first recess is located the below of second recess, the second recess is seted up the top surface of first board, the length of first recess is less than the length of second recess, the width of first recess is less than the width of second recess, the gasket is located the top of first recess, the bolt with first recess with be provided with the clearance between the inside wall of through-hole, first recess with the degree of depth sum of second recess is less than the thickness of first board, the bottom of first recess is used for buffering the removal of bolt.
Preferably, at least one notch is formed in each of two sides of the gasket, the notch corresponds to the first groove, and the width of the notch is not less than that of the first groove.
Preferably, the direction of the stepped groove is set according to the stress condition of the first plate and the second plate.
Preferably, the fastening assembly is a bolt, and the bolt is located in the middle of the stepped groove.
Preferably, the fastening assembly is a bolt, and the bolt is located at one end in the stepped groove.
Preferably, the fastening assembly is a bolt, and the material strength of the bolt is greater than that of the first plate.
Preferably, the fastening assembly is a bolt, and the joint of the first plate and the second plate is fixed by one or more bolts.
Preferably, the first plate is a composite plate and the second plate is a metal plate.
The invention discloses the following technical effects: when the airplane normally lands, the energy absorption device is used as a bearing structure, the tensile load between the first plate and the second plate of the airplane body is lower than the design limit load of the through hole at the bottom of the stepped groove, which is damaged by the extrusion of the fastening assembly, and the first plate cannot be damaged; when the airplane is crashed, the airplane impacts the ground to generate larger impact load, when the tensile load between the first plate and the second plate of the airplane body exceeds the extrusion strength of the through hole at the bottom of the stepped groove, the bottom of the stepped groove of the first plate is extruded and damaged, the fastening component extrudes and cuts the bottom of the stepped groove along the direction of the stepped groove, namely the first plate, a strip-shaped object generated by extrusion and cutting is outwards rolled and deformed and discharged along with the movement of the fastening component in the stepped groove, and in the process that the fastening component crushes the first plate, the impact energy is fully absorbed, and the structure safety of the airplane body and the personal safety of passengers are protected; when the first plate and the second plate are subjected to impact load, the fastening assembly cannot be damaged, and energy is absorbed through damage modes such as layering of the first plate, fiber fracture, matrix cracking and the like in the process; when the fastener assemblies reach one end of the first and second recesses, respectively, the driving force required for failure rises and the remaining impact force is insufficient to continue to damage the first panel, thus stopping the failure and ensuring that the structure does not fail catastrophically.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of an assembly of a first plate and a second plate according to a first embodiment;
FIG. 2 is a cross-sectional view of the step A-A of FIG. 1;
FIG. 3 is a schematic view of a gasket according to an embodiment;
FIG. 4 is a schematic view showing the assembly of the first plate and the second plate according to the second embodiment;
FIG. 5 is a cross-sectional view of the step B-B of FIG. 4;
FIG. 6 is an enlarged view of a portion C of FIG. 4;
FIG. 7 is a schematic view showing an internal structure of the energy absorption box according to the second embodiment;
FIG. 8 is a schematic view of the third embodiment of the present invention showing the engagement between the bolt and the stepped recess;
FIG. 9 is a schematic top view of a stepped recess in the third embodiment;
FIG. 10 is a front sectional view of a stepped groove in the third embodiment;
FIG. 11 is a schematic view of the first and second plates after relative displacement following an impact;
wherein, 1, a first plate; 2. a second plate; 3. a bolt; 4. a gasket; 5. a stepped groove; 6. a first groove; 7. a second groove; 8. a nut; 9. a sliding long groove; 10. a crash box fixed wall; 11. a crushing block; 12. a curved surface compression layer; 13. extruding the ball; 14. a connecting rod; 15. a compression plate; 16. a spring; 17. a third groove; 18. bolt holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
Referring to fig. 1-3, the invention provides a composite plate and metal plate lapping energy absorption device, which comprises a first plate 1 and a second plate 2, wherein the first plate 1 is positioned above the second plate 2, and the first plate 1 is connected with the second plate 2 through a fastening assembly;
the first plate 1 is provided with a stepped groove 5, the fastening component is positioned in the stepped groove 5, the bottom of the stepped groove 5 is used for buffering the movement of the fastening component, the fastening component penetrates through the through holes in the second plate 2 and the bottom of the stepped groove 5, and a gap is formed between the fastening component and the stepped groove 5 as well as between the fastening component and the inner side wall of the through hole; a gasket 4 is arranged between the head of the fastening assembly and the stepped groove 5.
When the airplane normally lands, the energy absorption device is used as a bearing structure, the tensile load between the first plate 1 and the second plate 2 of the airplane body is lower than the design limit load of the through hole at the bottom of the stepped groove 5 which is crushed by the fastening assembly, and the first plate 1 cannot be damaged; when a crash accident occurs, an airplane impacts the ground to generate a larger impact load, when the tensile load between the first plate 1 and the second plate 2 of the airplane body exceeds the extrusion strength of the through hole at the bottom of the stepped groove 5, the bottom of the stepped groove 5 of the first plate 1 is extruded and broken, the fastening component extrudes and cuts the bottom of the stepped groove 5 along the direction of the stepped groove 5, namely the first plate 1, strips generated by extrusion and cutting are outwards turned, rolled and deformed and discharged along with the movement of the fastening component in the stepped groove 5, and impact energy is fully absorbed in the process that the fastening component crushes the first plate 1, so that the structure safety of the airplane body and the personal safety of passengers are protected; when the first plate 1 and the second plate 2 are subjected to impact load, the fastening assembly cannot be damaged, and energy is absorbed through damage modes such as layering of the first plate 1, fiber fracture, matrix cracking and the like in the process; when the fastening assembly reaches one end of the first recess and the second recess, respectively, the driving force required for the destruction rises, and the remaining impact force is insufficient to continue to damage the first panel 1, thus stopping the destruction and ensuring that the structure is not catastrophically destroyed.
Further optimization scheme, fastening components adopts bolt 3, cascaded recess 5 includes first recess 6 and second recess 7, first recess 6 is located the below of second recess 7, second recess 7 is seted up at the top surface of first board 1, the length of first recess 6 is less than the length of second recess 7, the width of first recess 6 is less than the width of second recess 7, gasket 4 is located the top of first recess 6, be provided with the clearance between the inside wall of bolt 3 and first recess 6 and through-hole, the sum of the depth of first recess 6 and second recess 7 is less than the thickness of first board 1, the bottom of first recess 6 is used for buffering bolt 3's removal.
When collision happens, a stud of the bolt 3 firstly contacts the side wall of the through hole of the first groove 6, the bottom of the first groove 6 is a weak area, the composite material at the bottom of the bolt 3 and the bottom of the first groove 6 is extruded and cut, so that the first plate 1 is continuously damaged and crushed, in the crushing process, energy is absorbed, when the stud is extruded to the end part of the first groove 6 by impact force, the driving force required by the damage rises, and the rest impact force is not enough to continuously crush the first plate 1.
According to the further optimization scheme, the through hole is formed in the center of the gasket 4, the stud of the bolt 3 penetrates through the through hole, at least one opening is formed in the gasket 4 and located on the side edge of the through hole, the opening is arranged corresponding to the first groove 6, and the width of the opening is not smaller than that of the first groove 6. The bolt 3 extrudees, cuts the first board 1 of first recess 6 bottom and produces strip piece, and gasket 4 can guide broken strip piece outwards to roll up and be discharged from first recess 6 is interior, avoids piling up in first recess 6, influences the broken process of first board 1, and then influences the energy-absorbing effect.
In a further optimized scheme, the direction of the stepped groove 5 is set according to the stress condition of the first plate 1 and the second plate 2. Carry out the analysis according to first board 1 and the conventional stress point of second board 2, then confirm to do benefit to the angle scope of bolt 3 and the bottom extrusion cutting of cascaded recess 5, avoid bolt 3 and the unable abundant contact in cascaded recess 5 bottoms, and lead to unable absorption impact.
Further optimizing scheme, fastening components adopts bolt 3, and bolt 3 is located the middle part of cascaded recess 5. Considering that the direction of the impact force received by the first plate 1 and the second plate 2 is not fixed, the bolt 3 is positioned in the middle of the stepped groove 5, on one hand, the first plate 1 and the second plate 2 can be extruded, on the other hand, the first plate 1 and the second plate 2 can be stretched, and no matter the extrusion or the stretching occurs, the bottom of the stepped groove 5 has a space to be fully extruded and cut with the bolt 3, so that the direction of the impact force which cannot be determined can be met.
Further optimizing scheme, fastening components adopts bolt 3, and bolt 3 is located the one end in stepped recess 5. The positions of the bolts 3 are set, namely the stress directions of the first plate 1 and the second plate 2 are relatively determined, and stepped grooves 5 are formed in a targeted mode; when a collision working condition occurs, when the impact load exceeds a static design limit value, the energy absorption mode is excited, when the bolt 3 respectively reaches the end points of the first groove 6 and the second groove 7, the driving force required by the damage rises, the bolt 3 cannot continuously damage the first plate 1, and the uncontrollable catastrophic damage to the structure is prevented.
According to a further optimized scheme, the fastening assembly adopts the bolt 3, and the material strength of the bolt 3 is larger than that of the first plate 1.
In a further optimized scheme, the depth of the first groove 6 is greater than zero, and the depth of the second groove 7 is greater than or equal to zero. When the depth of the second groove 7 is zero, the spacer 4 is located above the first plate 1.
In a further optimized scheme, the fastening assembly adopts a bolt 3, and the joint of the first plate 1 and the second plate 2 adopts a fixing mode of fixing one bolt 3 or a fixing mode of fixing a plurality of bolts 3.
In a further optimized scheme, the first plate 1 is a composite plate, and the second plate 2 is a metal plate.
The working process of the embodiment is as follows: when the airplane normally lands, the energy absorption device is used as a bearing structure, the tensile load between the first plate 1 and the second plate 2 of the airplane body is lower than the design limit load of the through hole which is crushed and damaged by the bolt 3, and the first plate 1 cannot be damaged; when a crash accident occurs, an airplane impacts the ground to generate a large impact load, when the tensile load between the first plate 1 and the second plate 2 of the airplane body exceeds the extrusion strength of the through holes, the through holes of the first plate 1 are extruded and damaged, the bolts 3 extrude and cut the first plate 1 in the stepped grooves 5 along the direction of the stepped grooves 5, strips generated by extrusion and cutting are turned outwards along with the movement of the bolts 3 in the stepped grooves 5 to be deformed and discharged, and in the process that the bolts 3 crush the first plate 1, impact energy is fully absorbed, so that the structure safety of the airplane body and the personal safety of passengers are protected; when the first plate 1 and the second plate 2 are subjected to impact load, the bolts 3 cannot be damaged, and energy is absorbed through damage modes such as layering of the first plate 1, fiber fracture, matrix cracking and the like in the process; when the bolts 3 reach one end of the first groove 6 and the second groove 7, respectively, and are blocked by the first plate 1, the driving force required for the destruction rises, and the remaining impact force is insufficient to continue to damage the first plate 1, so that the destruction is stopped, and the structure is guaranteed against catastrophic destruction.
The energy absorption device of the first plate 1 and the second plate 2 connected through the bolts 3 in the lap joint structure provided by the embodiment is a bearing structure and an energy absorption structure, can be used as a structural member in a normal working state, and has the advantages that the triggering mode is stable, the damage distance is controllable, the energy absorption can be designed, and the structure is kept complete in the damage process when the bolt 3 cuts the first plate 1 and absorbs energy when large impact load is applied. In addition, the direction of the stepped groove 5 and the position of the bolt 3 in the stepped groove 5 can be adjusted according to the load condition that the structure is easy to damage, and the stepped groove can be designed to absorb energy only in one direction (tensile direction or compression direction) or in both directions. Moreover, the energy absorption structure has wide applicability, and can be applied to impact-resistant designs such as vehicle collision protection, airplane crash, forced landing of a helicopter and the like.
Example two
Referring to fig. 4 to 7, the energy absorbing device of the present embodiment is different from the first embodiment only in that a sliding long groove 9 is formed in the second plate 2, the direction of the sliding long groove 9 is perpendicular to the direction of the stepped groove 5, the bolt 3 penetrates through the intersection point of the stepped groove 5 and the sliding long groove 9, energy absorbing boxes are arranged on both sides of the first plate 1, the energy absorbing boxes are fixedly connected between the first plate 1 and the second plate 2, and the energy absorbing boxes are of a square structure.
Further optimize the scheme, the energy-absorbing box includes the fixed wall 10 of energy-absorbing box of fixed connection on second board 2, two conquassation pieces 11 of the fixed wall 10 inner wall fixedly connected with of energy-absorbing box, it is gapped to be provided with between two conquassation pieces 11, fixedly connected with curved surface compression layer 12 between first board 1 and the fixed wall 10 of energy-absorbing box, be provided with spring 16 and kicking block between the curved surface compression layer 12, spring 16 fixes between kicking block and first board 1, spring 16's one end and two conquassation piece 11 butts are kept away from to the kicking block.
Further optimize the scheme, the kicking block includes a terminal surface and 16 fixed connection's of spring compression board 15, the perpendicular fixedly connected with connecting rod 14 of the other end of compression board 15, and the one end fixedly connected with squeeze ball 13 of compression board 15 is kept away from to connecting rod 14, and the clearance between squeeze ball 13 and two crushing pieces 11 corresponds the setting, and squeeze ball 13 and two crushing pieces 11 butt setting.
In a further preferred embodiment, the material of the crushing block 11 is the same as that of the first plate 1.
The working process of the embodiment is as follows:
when the energy absorption device is impacted, the first plate 1 and the second plate 2 are relatively displaced, the displacement direction of the second plate 2 is perpendicular to the direction of the stepped groove 5, namely, the second plate is displaced along the direction of the sliding long groove 9, the relative movement direction of the bolt 3 is also perpendicular to the stepped groove 5, the side wall in the stepped groove 5 cannot be crushed, and the energy absorption process cannot be completed, at the moment, the first plate 1 and the second plate 2 are extruded or stretched, the curved surface compression layer 12 on one side is compressed, and the curved surface compression layer 12 on the other side is stretched, so that a first-stage energy absorption stage is achieved; as the relative displacement between the first plate 1 and the second plate 2 continues, the spring 16 on one side is severely compressed by the compression plate 15 and the first plate 1, and the spring 16 on the other side is severely stretched by the compression plate 15 and the first plate 1, so as to achieve a secondary energy absorption stage; when the spring 16 is compressed to the utmost, the first plate 1 directly transmits the impact force to the compression plate 15, and then the compression plate 15 pushes the connecting rod 14 and the extrusion ball 13 in sequence, so that the extrusion ball 13 moves towards the gap between the two crushing blocks 11, along with the movement of the extrusion ball 13, the opposite surfaces of the two crushing blocks 11 close to the gap are extruded and sheared by the extrusion ball 13, the generated strip-shaped fragments fall below the extrusion ball 13, and the crushing process is a three-stage energy absorption stage. The three-stage energy absorption is completed, and the purpose of transition damage of the first plate 1 and the second plate 2 is achieved.
EXAMPLE III
Referring to fig. 8 to 11, the stepped groove 5 of the present embodiment is different from the first embodiment only in that a second groove 7 and a third groove 17 are formed in the stepped groove 5, the third groove 17 is located below the second groove 7, the distance between the inner long side walls of the third groove 17 is smaller than the major diameter of the bolt 3, a bolt hole 18 is formed in the third groove 17, and the bolt 3 passes through the bolt hole 18 and the second plate 2 to be screwed with the nut 8.
The working process of the embodiment is as follows:
when collision occurs, the second plate 2 drives the bolt 3 and the first plate 1 to generate relative displacement, the bolt 3 moves in the third groove 17, and as the distance between the third grooves 17 is smaller than the major diameter of the bolt 3, even if the moving direction of the bolt 3 is the same as the direction of the stepped groove 5, the bolt 3 can be more fully extruded and cut with the inner side wall of the third groove 17, and different extrusion and cutting directions are formed by being different from the relative displacement directions of the first plate 1 and the second plate 2 in the first embodiment; meanwhile, the depth of the third groove 17 can be adjusted, and various energy absorption requirements are met.
Example four
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (9)
1. The utility model provides a composite material board and metal sheet overlap joint energy-absorbing device which characterized in that: the composite plate comprises a first plate (1) and a second plate (2), wherein the first plate (1) is positioned above the second plate (2), and the first plate (1) is connected with the second plate (2) through a fastening assembly;
a stepped groove (5) is formed in the first plate (1), the fastening assembly is located in the stepped groove (5), the bottom of the stepped groove (5) is used for buffering the movement of the fastening assembly, the fastening assembly penetrates through holes in the second plate (2) and the bottom of the stepped groove (5), and a gap is formed between the fastening assembly and the stepped groove (5) and between the fastening assembly and the inner side wall of the through hole; a gasket (4) is arranged between the head of the fastening component and the stepped groove (5).
2. The composite plate and metal plate lap joint energy absorption device according to claim 1, wherein: the fastening component adopts a bolt (3), the stepped groove (5) comprises a first groove (6) and a second groove (7), the first groove (6) is positioned below the second groove (7), the second groove (7) is arranged on the top surface of the first plate (1), the length of the first groove (6) is smaller than the length of the second groove (7), the width of the first groove (6) is smaller than the width of the second groove (7), the gasket (4) is positioned above the first groove (6), a gap is arranged between the bolt (3) and the inner side wall of the first groove (6) and the through hole, the sum of the depths of the first recess (6) and the second recess (7) being smaller than the thickness of the first plate (1), the bottom of the first groove (6) is used for buffering the movement of the bolt (3).
3. The composite plate and metal plate lap joint energy absorption device according to claim 2, wherein: at least one opening is formed in each of two sides of the gasket (4), the opening is arranged corresponding to the first groove (6), and the width of the opening is not smaller than that of the first groove (6).
4. The composite plate and metal plate lap joint energy absorption device according to claim 1, wherein: the direction of the stepped groove (5) is set according to the stress condition of the first plate (1) and the second plate (2).
5. The composite plate and metal plate lap joint energy absorption device according to claim 1, wherein: the fastening assembly adopts a bolt (3), and the bolt (3) is positioned in the middle of the stepped groove (5).
6. The composite plate and metal plate lap joint energy absorption device according to claim 1, wherein: the fastening assembly adopts a bolt (3), and the bolt (3) is positioned at one end of the stepped groove (5).
7. The composite plate and metal plate lap joint energy absorption device according to claim 1, wherein: the fastening assembly adopts a bolt (3), and the material strength of the bolt (3) is greater than that of the first plate (1).
8. The composite plate and metal plate lap joint energy absorption device according to claim 1, wherein: the fastening assembly adopts bolts (3), and the joint of the first plate (1) and the second plate (2) adopts a fixing mode of fixing the bolts (3) or a fixing mode of fixing a plurality of bolts (3).
9. The composite plate and metal plate lap joint energy absorption device according to claim 1, wherein: the first plate (1) is a composite plate, and the second plate (2) is a metal plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111232520.1A CN113958653A (en) | 2021-10-22 | 2021-10-22 | Composite material plate and metal plate lap joint energy absorption device |
Applications Claiming Priority (1)
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| CN112339689A (en) * | 2019-08-08 | 2021-02-09 | 丹阳市车船装饰件有限公司 | Automobile anti-collision cross beam with strong impact resistance |
| CN214195341U (en) * | 2020-12-14 | 2021-09-14 | 吴江市恒吉净化彩板有限公司 | High-strength anti-collision color steel sandwich plate |
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| JPH0715453U (en) * | 1993-08-26 | 1995-03-14 | 西川化成株式会社 | Bumper structure |
| US6050624A (en) * | 1996-12-05 | 2000-04-18 | Hyundai Motor Company | Bumper mounting structure |
| JPH10309968A (en) * | 1997-05-12 | 1998-11-24 | Tachi S Co Ltd | Method for suppressing rebound of vehicle shock absorbing sheet and vehicle shock absorbing sheet |
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| CN112339689A (en) * | 2019-08-08 | 2021-02-09 | 丹阳市车船装饰件有限公司 | Automobile anti-collision cross beam with strong impact resistance |
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