CN112161880A - Test device for testing shearing performance - Google Patents

Test device for testing shearing performance Download PDF

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Publication number
CN112161880A
CN112161880A CN202011194115.0A CN202011194115A CN112161880A CN 112161880 A CN112161880 A CN 112161880A CN 202011194115 A CN202011194115 A CN 202011194115A CN 112161880 A CN112161880 A CN 112161880A
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CN
China
Prior art keywords
joint
test piece
testing
connection
loading
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Pending
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CN202011194115.0A
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Chinese (zh)
Inventor
石经纬
冯荣欣
胡忠民
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Commercial Aircraft Corp of China Ltd
Beijing Aeronautic Science and Technology Research Institute of COMAC
Original Assignee
Commercial Aircraft Corp of China Ltd
Beijing Aeronautic Science and Technology Research Institute of COMAC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Commercial Aircraft Corp of China Ltd, Beijing Aeronautic Science and Technology Research Institute of COMAC filed Critical Commercial Aircraft Corp of China Ltd
Priority to CN202011194115.0A priority Critical patent/CN112161880A/en
Publication of CN112161880A publication Critical patent/CN112161880A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0003—Steady
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0025—Shearing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0075—Strain-stress relations or elastic constants
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0676—Force, weight, load, energy, speed or acceleration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0682—Spatial dimension, e.g. length, area, angle

Abstract

The invention discloses a test device for testing shearing performance, and relates to the technical field of shearing performance testing. The test device for testing the shearing performance comprises a clamp, a connecting joint and a loading joint, wherein the clamp is detachably connected with the edge of a test piece, a load is applied along a first diagonal of the test piece through the clamp, the connecting joint and the loading joint are arranged on two corners corresponding to the first diagonal, one end of the connecting joint is hinged to the clamp, the other end of the connecting joint is hinged to the loading joint, and the loading joint is hinged to a testing machine. According to the test device for testing the shearing performance, the connecting joint, the clamp and the loading joint are hinged, load transfer is clear, a test load close to pure shearing can be provided for a test piece, and high-precision test loading is realized.

Description

Test device for testing shearing performance
Technical Field
The invention relates to the technical field of shear performance testing, in particular to a testing device for testing shear performance.
Background
Aircraft are typically thin shell structures, and stability is one of the important design factors. For the wallboard structures such as civil aircrafts and the like, the shearing allowable stress is one of the main bases of structure design, and is determined and verified mainly by adopting a test method, and meanwhile, the test method is also the best way for determining the shearing allowable stress.
In a shearing experiment, shearing load is transmitted to the interior of a test piece through the boundary of the test piece, and the design of a test fixture and the test piece has important influence on the structure load transmission accuracy. At present, shear load is mainly applied to four sides of a square test piece in a diagonal tension mode, a clamp connecting plate is connected with the edge of the test piece through a bolt to disperse and transmit the load to the test piece, but a non-shear load component perpendicular to the edge of the test piece generally exists in the load, so that the test piece is in a non-pure shear state, meanwhile, the maximum shear load borne by the bolt is increased due to the non-shear load component, and the test precision and reliability are reduced.
Disclosure of Invention
The invention aims to provide a test device for testing shearing performance, so as to improve the precision and reliability of the test.
In order to achieve the purpose, the invention adopts the following technical scheme:
a test device for testing shear performance, comprising:
the clamp is detachably connected with the edge of the test piece, and loads are applied along a first diagonal line of the test piece through the clamp;
the test device comprises a connecting joint and a loading joint, wherein the connecting joint and the loading joint are arranged on two corners corresponding to a first diagonal line, one end of the connecting joint is hinged to the clamp, the other end of the connecting joint is hinged to the loading joint, and the loading joint is hinged to the testing machine.
Optionally, the fixture comprises a plurality of connecting plates, the connecting plates are arranged at the edge of the test piece in an end-to-end connection manner, and the joints on the first diagonal are connected through the connecting joints.
Optionally, a first connection post is disposed on the connection plate, a first connection hole is disposed on the connection joint, and the first connection hole is hinged to the first connection post.
Optionally, each connecting plate is provided with one first connecting column, and each connecting plate corresponds to one connecting joint.
Optionally, one of the first connecting columns is disposed at an end or a middle portion of the connecting plate.
Optionally, two first connecting columns are arranged on each connecting plate, each connecting plate corresponds to two connecting joints, and the two connecting joints are hinged.
Optionally, one end of one of the two connection joints is provided with a second connection column, and the second connection column is hinged to the other connection joint.
Optionally, a second connecting hole is formed in the connecting joint, a third connecting hole is formed in the loading joint, and the second connecting hole is connected with the third connecting hole through a first pin shaft.
Optionally, a fourth connecting hole is formed in the loading joint, and the fourth connecting hole is connected with the testing machine through a second pin shaft.
Optionally, the loading joint includes a plurality of support lugs, each of the support lugs is provided with a third connecting hole, and the third connecting holes on the support lugs are located on the same central line; the test piece is located a plurality of the centre of journal stirrup, the upper and lower both sides of test piece the attach fitting through two first round pin axles respectively with the loading connects and is connected.
The invention has the beneficial effects that:
according to the test device for testing the shearing performance, the clamp is detachably connected with the edge of the test piece, a load is applied along a first diagonal line of the test piece through the clamp, a connecting joint and a loading joint are arranged on two corners corresponding to the first diagonal line, one end of the connecting joint is hinged with the clamp, the other end of the connecting joint is hinged with the loading joint, and the loading joint is hinged with the test machine. The clamp is connected with the test piece to transfer shear load, the testing machine is hinged to the loading joint, the loading joint is hinged to the connecting joint, the connecting joint is hinged to the clamp, and the load applied by the testing machine is transferred to the edge of the test piece through the loading joint and the connecting joint so that the load transferred to the edge of the test piece is parallel to the edge of the test piece. The test device for testing the shearing performance provided by the invention has clear load transfer, can provide a test load of nearly pure shearing for a test piece, and realizes high-precision test loading.
Drawings
FIG. 1 is a schematic structural diagram of a testing apparatus for testing shear performance according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a test piece according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a connection board according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a connection joint according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a load coupling according to an embodiment of the present invention;
FIG. 6 is a schematic view of a load transfer analysis provided in accordance with an embodiment of the present invention;
FIG. 7 is a schematic diagram of an analytical simulation of a load parallel to an edge of a test piece according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of an analytical simulation of a load perpendicular to an edge of a test piece according to an embodiment of the present invention;
FIG. 9 shows a shear strain E of a test piece according to an embodiment of the present inventionXYAn analytical simulation schematic of (a);
FIG. 10 shows a positive strain E in the X-direction of a test piece according to an embodiment of the present inventionXXAn analytical simulation schematic of (a);
FIG. 11 shows a Y-direction positive strain E of a test piece according to one embodiment of the present inventionYYAn analytical simulation schematic of (a);
FIG. 12 is a schematic structural diagram of a connecting plate according to a second embodiment of the present invention;
FIG. 13 is a schematic view of an analytical simulation of the load parallel to the edge of the test piece according to a second embodiment of the present invention;
FIG. 14 is a schematic view of an analytical simulation of a load perpendicular to the edge of a test piece according to a second embodiment of the present invention;
FIG. 15 shows the shear strain E of the test piece provided in the second embodiment of the present inventionXYAn analytical simulation schematic of (a);
FIG. 16 shows a positive strain E in the X direction of a test piece according to the second embodiment of the present inventionXXAn analytical simulation schematic of (a);
FIG. 17 shows a Y-direction positive strain E of a test piece according to the second embodiment of the present inventionYYAn analytical simulation schematic of (a);
FIG. 18 is a schematic structural diagram of a testing apparatus for testing shear performance provided in the third embodiment of the present invention;
FIG. 19 is a schematic view of an analytical simulation of the load parallel to the edge of the test piece provided by the third embodiment of the present invention;
FIG. 20 is a schematic view of an analytical simulation of the load perpendicular to the edge of the test piece provided by the third embodiment of the present invention;
FIG. 21 shows the shear strain E of a test piece according to the third embodiment of the present inventionXYAn analytical simulation schematic of (a);
FIG. 22 shows a positive strain E in the X direction of a test piece provided in the third embodiment of the present inventionXXAn analytical simulation schematic of (a);
FIG. 23 shows a Y-direction positive strain E of a test piece according to a third embodiment of the present inventionYYA schematic diagram of the analysis simulation of (a).
The labels in the figure are:
1. a test piece; 2. a connecting plate; 3. connecting a joint; 4. a loading joint;
11. a first connecting structure; 12. unfilled corners; 21. a first connecting column; 22. a second connecting structure; 31. a first connection hole; 32. a second connection hole; 33. a second connecting column; 41. a third connection hole; 42. and a fourth connecting hole.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The test device for testing the shearing performance can generate a loading effect similar to pure shearing in a test piece, and is particularly suitable for occasions with high requirements on the application precision of the shearing load. The test device can be applied to the in-plane shear performance test of metal and composite material wall plates in the engineering fields of aviation, aerospace, civil engineering and the like.
Example one
As shown in fig. 1 to 5, the present embodiment provides a test apparatus for testing shear performance, which includes a clamp, a connection joint 3, and a loading joint 4, wherein the clamp is detachably connected to an edge of a test piece 1, and a load is applied along a first diagonal line of the test piece 1 through the clamp; and two corners corresponding to the first diagonal line are provided with a connecting joint 3 and a loading joint 4, one end of the connecting joint 3 is hinged with the clamp, the other end of the connecting joint is hinged with the loading joint 4, and the loading joint is hinged with the testing machine.
According to the test device for testing the shearing performance, the clamp is detachably connected with the edge of the test piece 1, a load is applied through the clamp along the first diagonal of the test piece 1, the two corners corresponding to the first diagonal are provided with the connecting joint 3 and the loading joint 4, one end of the connecting joint 3 is hinged to the clamp, the other end of the connecting joint is hinged to the loading joint 4, and the loading joint 4 is hinged to the testing machine. The clamp is connected with the test piece 1 to transfer shear load, the testing machine is hinged to the loading joint 4, the loading joint 4 is hinged to the connecting joint 3, the connecting joint 3 is hinged to the clamp, and the load applied by the testing machine is transferred to the edge of the test piece 1 through the loading joint 4 and the connecting joint 3 so that the load transferred to the edge of the test piece 1 is parallel to the edge of the test piece 1. The test device for testing the shearing performance provided by the invention has clear load transfer, can provide a test load of nearly pure shearing for the test piece 1, and realizes high-precision test loading.
As shown in fig. 2, in the present embodiment, the edge of the test piece 1 is provided with a first connecting structure 11, and the first connecting structure 11 is detachably connected with the clamp. Each corner of the test piece 1 is provided with a notch 12, and the intersection point of the connecting lines of the central lines of the first connecting structures 11 on the two adjacent sides of the test piece 1 is the edge of the notch 12. This arrangement ensures that the shear load does not produce an additional bending moment on the test piece 1. The bending moment here refers to the bending moment of the test piece 1 in the jig.
Optionally, the unfilled corners 12 are rectangular, triangular, or scalloped. In this embodiment, the unfilled corner 12 is a sector, and the edge of the sector is the middle point of an arc, that is, the intersection point of the connecting lines of the center lines of the adjacent two first connecting structures 11 of the test piece 1 is the middle point of the arc (point a in fig. 2). Of course, in other embodiments, the unfilled corner 12 may also be a rectangle, and the intersection point of the connecting lines of the center lines of the first connecting structures 11 on two adjacent sides of the test piece 1 is the vertex of one corner of the rectangle. The unfilled corner 12 can also be an isosceles triangle, and the intersection point of the connecting lines of the central lines of the first connecting structures 11 on the two adjacent sides of the test piece 1 is the middle point of the inclined side of the isosceles triangle.
Alternatively, the first connecting structure 11 on the test piece 1 is a threaded hole, which may be single or multiple rows. In this embodiment, the jig is also provided with a threaded hole, and the test piece 1 is connected to the jig by a bolt. In this embodiment, the threaded holes formed in the test piece 1 are single-row threaded holes, and the intersection point of the connecting lines of the center lines of the single-row threaded holes on two adjacent sides is located at the middle point of the circular arc. In other embodiments, multiple rows of threaded holes may be provided. When the first connecting structure 11 is a plurality of rows of threaded holes, the intersection point of the center lines of the plurality of rows of threaded holes on two adjacent sides is located at the middle point of the circular arc. Of course, in other embodiments, the first connecting structure 11 may also have other structures, for example, the first connecting structure 11 is a protrusion, a groove is provided on the fixture, and the protrusion is connected with the groove in a snap-fit manner.
Optionally, the fixture comprises a plurality of connecting plates 2, the connecting plates 2 are arranged at the edge of the test piece 1 end to end, and the joints on the first diagonal are connected through connecting joints 3. In this embodiment, the connection plates 2 are further provided with second connection structures 22, the second connection structures 22 are located at the joints of the plurality of connection plates 2 on the non-first diagonal lines, the second connection structures 22 are threaded holes, and the joints of the connection plates 2 on the non-first diagonal lines are connected through bolts and the threaded holes. The test piece 1 is rectangular, the number of the connecting plates 2 is four, two opposite corners on a first diagonal are provided with loading joints 4, and two adjacent connecting plates 2 are connected with two connecting joints 3 in a one-to-one correspondence mode. Of course, in other embodiments, the test piece 1 may also be square or other shapes.
Optionally, the connecting plate 2 is provided with a first connecting post 21, the connecting joint 3 is provided with a first connecting hole 31 and a second connecting hole 32, and the first connecting hole 31 is hinged to the first connecting post 21. The loading joint 4 is provided with a third connecting hole 41 and a fourth connecting hole 42, and the second connecting hole 32 is connected with the third connecting hole 41 through a first pin shaft; the fourth connecting hole 42 is connected to the testing machine by a second pin. In this embodiment, the second connection holes 32 of the two connection joints 3 are connected with the loading joint 4 through the first pin shaft, the testing machine stretches outwards along the first diagonal line of the test piece 1 through the loading joint 4, the load is transmitted to the connection plate 2, and the connection plate 2 transmits the shearing load to the test piece 1 through the bolt.
Alternatively, as shown in fig. 3 and 4, one first connecting column 21 is provided on each connecting plate 2, and each connecting plate 2 corresponds to one connecting joint 3. In the present embodiment, one first connection post 21 is disposed at the end of the connection plate 2, and the length of the connection joint 3 is shorter, so that the first connection hole 31 on the connection joint 3 is matched with the first connection post 21.
In this embodiment, the front and back surfaces of the test piece 1 are provided with the connection plates 2 and the connection joints 3. Connecting plate 2 and attach fitting 3 of tow sides are with test 1 clamp in the centre for the both sides atress of test 1 is more even.
Optionally, as shown in fig. 5, the loading joint 4 includes a plurality of support lugs, each of the support lugs is provided with a third connection hole 41, and the third connection holes 41 on the support lugs are located on the same central line. The test piece 1 is located the centre of a plurality of lugs, and the attach fitting 3 of both sides is connected with loading joint 4 respectively through two first round pin axles about test piece 1. In this embodiment, the connection joint 3 includes four lugs, which are a first lug, a second lug, a third lug and a fourth lug from top to bottom. The two connecting joints 3 positioned on the upper side of the test piece 1 are arranged between the first support lug and the second support lug, and the two connecting joints 3 are connected with the loading joint 4 through a first pin shaft which penetrates through a third connecting hole 41 on the first support lug, the second connecting holes 32 of the two connecting joints 3 and the third connecting hole 41 on the second support lug; the two connecting joints 3 on the lower side of the test piece 1 are arranged between the third lug and the fourth lug, and the two connecting joints 3 are connected with the loading joint 4 through the other first pin shaft passing through the third connecting hole 41 on the fourth lug, the second connecting holes 32 of the two connecting joints 3 and the third connecting hole 41 on the third lug.
The test device of test shear performance that this embodiment provided, the shear load homogeneity of the bolt that connecting plate 2 and test 1 are connected is better, is difficult for causing the destruction in advance at test 1 edge, and the load is insensitive to the thickness change of anchor clamps connecting plate 2, more is favorable to carrying out systematic design and analysis to the anchor clamps.
As shown in fig. 6, the tensile load F of the tester is transmitted to the edge of the test piece 1 through the jig in the first diagonal direction of the test piece 1. Since both ends of the two connection joints 3 are hinged, only loads F1 and F2 along the length of the connection plate 2 are transmitted, and according to the force triangle rule, the force triangle rule is obtained
Figure BDA0002753515910000091
Figure BDA0002753515910000092
Average shear line load at the edge of test piece 1
Figure BDA0002753515910000093
I.e. the average shear line loading is the same for the four sides. The intersection point of the connecting lines of the central lines of the first connecting structures 11 at two adjacent sides of the test piece 1 is the same as the action point position of the load F, and theoretically, no extra bending moment is generated in the test piece 1 and only shear load is generated.
The bolt load of the test piece 1 and the strain analysis of the test piece 1 are carried out by adopting a finite element analysis method, the analysis results are shown in fig. 7-11, the bolt shearing load is mainly along the edge direction of the test piece 1, and the load perpendicular to the edge of the test piece 1 is smaller. In addition, the ratio of the maximum shearing load to the minimum shearing load of the bolt is only 1.38, so that the reliability of the test fixture is improved. Shear strain E of test piece 1XYAbout 7.572X 10-3And a positive strain EXXIs only 1.344 × 10-4,EYYIs only 3.528 x 10-5And the effect of approximate pure shearing is obtained. It should be noted that the shear strain herein is a ratio of a change value of the length of the test piece 1 under a load to an original length of the test piece 1, for example, the original length of the test piece 1 is 1m, the test piece 1 is elongated by 1mm under a load, and the shear strain E isXYIs 0.001. EXXShear strain in the X direction, EYYShear strain in the Y direction. In this example, the X direction is the longitudinal direction of the test piece 1, and the Y direction is the width direction of the test piece 1.
Example two
The difference between the test device for testing shear performance provided in this embodiment and the first embodiment is that:
as shown in fig. 12, one first connection post 21 on each connection plate 2 is disposed in the middle of the connection plate 2, and the length of the connection joint 3 is correspondingly longer, so that the first connection hole 31 on the connection joint 3 is matched with the first connection post 21.
Bolt load of the test piece 1 and strain analysis of the test piece 1 were performed by the finite element analysis method, and as can be seen from fig. 13 to 17, effects similar to those of the embodiment were obtained.
EXAMPLE III
The difference between the test device for testing shear performance provided in this embodiment and the first embodiment is that:
as shown in fig. 18, two first connecting columns 21 are provided on each connecting plate 2, two connecting joints 3 are provided on each connecting plate 2, and the two connecting joints 3 are hinged. Specifically, one end of one of the two connection joints 3 is provided with a second connection column 33, and is hinged with the other connection joint 3 through the second connection column 33. In the present embodiment, the second connecting column 33 of one of the connecting joints 3 is hinged with the second connecting hole 32 of the other connecting joint 3.
Finite element analysis is adopted to analyze the loading condition of the test piece 1, and fig. 19 and 20 are respectively an analysis simulation diagram of the load parallel to the edge of the test piece 1 and the load perpendicular to the edge of the test piece 1. Fig. 21 to 23 are schematic diagrams showing the strain analysis simulation of the test piece 1, and it can be seen that similar effects to those of the embodiment are obtained, the bolt load is more uniform, and the shear strain of the test piece 1 is more uniform.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims (10)

1. A test device for testing shear performance, comprising:
a clamp, which is detachably connected to the edge of the test piece (1), and by which a load is applied along a first diagonal of the test piece (1);
connect joint (3) and loading connects (4), all be provided with on two angles that first diagonal corresponds connect (3) with loading connects (4), the one end of connect (3) with anchor clamps are articulated, the other end with loading connects (4) are articulated, loading connects (4) are articulated with the testing machine.
2. The test device for testing the shearing performance as claimed in claim 1, wherein the clamp comprises a plurality of connecting plates (2), the connecting plates (2) are arranged at the edge of the test piece (1) in an end-to-end manner, and the joints on the first diagonal are connected through the connecting joints (3).
3. The test device for testing shear performance according to claim 2, wherein the connection plate (2) is provided with a first connection post (21), the connection joint (3) is provided with a first connection hole (31), and the first connection hole (31) is hinged with the first connection post (21).
4. A test device for testing shear properties according to claim 3, wherein one first connection post (21) is provided on each connection plate (2), and each connection plate (2) corresponds to one connection joint (3).
5. The test device for testing shear properties according to claim 4, wherein one first connection post (21) is provided at an end portion or a middle portion of the connection plate (2).
6. The test device for testing the shearing performance as claimed in claim 3, wherein two first connecting columns (21) are arranged on each connecting plate (2), each connecting plate (2) corresponds to two connecting joints (3), and the two connecting joints (3) are hinged.
7. The test device for testing shear performance according to claim 6, characterized in that one end of one of the two said connecting joints (3) is provided with a second connecting column (33), and the other said connecting joint (3) is hinged through the second connecting column (33).
8. The test device for testing the shearing performance as claimed in claim 3, wherein a second connecting hole (32) is formed in the connecting joint (3), a third connecting hole (41) is formed in the loading joint (4), and the second connecting hole (32) and the third connecting hole (41) are connected through a first pin shaft.
9. The test device for testing the shearing performance as recited in claim 8, wherein a fourth connecting hole (42) is formed in the loading joint (4), and the fourth connecting hole (42) is connected with the testing machine through a second pin shaft.
10. The test device for testing the shearing performance as recited in any one of claims 1 to 9, wherein the loading joint (4) comprises a plurality of support lugs, a third connecting hole (41) is arranged on each of the plurality of support lugs, and the third connecting holes (41) on the plurality of support lugs are positioned on the same central line; the test piece (1) is located in the middle of the plurality of support lugs, and the connecting joints (3) on the upper side and the lower side of the test piece (1) are respectively connected with the loading joint (4) through two first pin shafts.
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CN113484166A (en) * 2021-08-23 2021-10-08 吉林建筑大学 Testing device for testing interface shearing performance between fiber and medium
CN114544349A (en) * 2022-02-25 2022-05-27 中国航空工业集团公司西安飞机设计研究所 Strength test structure and method for airtight top plate connecting structure of transport engine room
CN114720169A (en) * 2022-06-07 2022-07-08 中国飞机强度研究所 Complex stress boundary loading system for testing aircraft plane structure discrete source impact resistance

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113138073A (en) * 2021-04-20 2021-07-20 中国飞机强度研究所 Composite load test device and method
CN113138073B (en) * 2021-04-20 2023-10-20 中国飞机强度研究所 Composite load test device and method
CN113484166A (en) * 2021-08-23 2021-10-08 吉林建筑大学 Testing device for testing interface shearing performance between fiber and medium
US11624688B2 (en) 2021-08-23 2023-04-11 Jilin Jianzhu University Testing device for measuring interfacial shear properties between fibers and media
CN114544349A (en) * 2022-02-25 2022-05-27 中国航空工业集团公司西安飞机设计研究所 Strength test structure and method for airtight top plate connecting structure of transport engine room
CN114544349B (en) * 2022-02-25 2024-04-09 中国航空工业集团公司西安飞机设计研究所 Structure and method for testing strength of airtight top plate connection structure of cabin of conveyor
CN114720169A (en) * 2022-06-07 2022-07-08 中国飞机强度研究所 Complex stress boundary loading system for testing aircraft plane structure discrete source impact resistance
CN114720169B (en) * 2022-06-07 2022-08-12 中国飞机强度研究所 Complex stress boundary loading system for testing aircraft plane structure discrete source impact resistance

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