CN116448560A - A kind of compression test device and test method for laminated board - Google Patents

Abstract

The invention relates to a compression test device and a test method for a laminated board, wherein the device comprises: first and second pressure members, first and second clamping assemblies, and first and second height adjustment assemblies; wherein the first pressing piece and the second pressing piece are coaxial and are arranged at a certain distance; the laminated board is arranged between the first pressing piece and the second pressing piece, and the front surface and the rear surface of the laminated board are symmetrically provided with a first clamping component and a second clamping component; a first height adjustment assembly and/or the second height adjustment assembly is provided between the first and second clamping assemblies and the first pressing member. The device provided by the invention can be matched with laminated boards with various size and configuration by adding the cushion blocks, so that the applicability of the device is improved, and the test cost is reduced; the reinforcing ribs are adopted to lighten the weight of the device while ensuring the strength of the device, the test pieces are simple to install, the test pieces of laminated boards with various sizes are rapidly installed, the test period is shortened, and the test efficiency is improved.

Description

A kind of compression test device and test method for laminated board

technical field

The invention relates to the technical field of aircraft compression tests, in particular to a compression test device and a test method for laminated boards.

Background technique

In the prior art, compression tests provide basic data for material specification, material development and research, quality assurance, structural design and analysis. Existing compression test methods provide for determining the compressive properties of high-modulus fiber-reinforced polymer matrix composite laminates by supporting the specimen surface with multi-bolt support fixtures. Due to the actual needs of aircraft strength design, it is necessary to study the influence of different damage parameters on the structural strength performance of composite laminates, such as damage size, aspect ratio, hole spacing, etc., which makes the test pieces have various size configurations. The current fixture is only suitable for one test piece size, and for large-size test pieces, the existing fixture is heavy and difficult to install; secondly, the length of the fixture and the width of the surface supporting the test piece are fixed, so only It is suitable for test pieces with fixed length and width. For test pieces with large size or different size types, the overall mass of the existing fixture will be very large, which will cause the fixture to be separated from its pressure drive. The fixture must be assembled as a whole before the test Finally placed on the testing machine, the installation is more difficult.

Contents of the invention

The object of the present invention is to solve the shortcomings in the prior art, and provide a compression test device and test method for laminated boards, which are used to solve the above-mentioned problems in the prior art.

The above-mentioned technical purpose of the present invention will be realized through the technical scheme described below.

A compression testing device for laminated boards, the device comprising: first and second compression members, first and second clamping assemblies, and first and second height adjustment assemblies; wherein,

The first pressure-applying member and the second pressure-applying member are coaxial and arranged at a certain distance, and are used to provide vertical pressure to the laminate during the compression test;

The laminate is arranged between the first pressing member and the second pressing member, and the first clamping assembly and the second clamping assembly are arranged symmetrically on the front and rear surfaces thereof, and the first and second clamping assemblies are arranged symmetrically. a clamping assembly for clamping the laminate;

The first adjustment assembly is arranged between the first and second clamping assemblies and the first pressing member, and/or, between the first and second clamping assemblies and the second pressing member The second height adjustment assembly is arranged between them.

According to the above aspect and any possible implementation manner, an implementation manner is further provided, the first pressing member is an upper pressing plate, and the second pressing member is a lower pressing plate.

According to the above aspect and any possible implementation manner, an implementation manner is further provided, wherein each of the first and second height adjustment components includes at least one spacer or more.

According to the above aspect and any possible implementation, an implementation is further provided, the first clamping assembly includes a short splint, a support plate and a long splint in sequence from top to bottom, the support plate and the short splint The splint is connected and attached to the surface of the long splint so that the surfaces of the long splint and the short splint are in the same vertical plane.

According to the above aspect and any possible implementation, an implementation is further provided, the second clamping assembly includes a long splint, a support plate and a short splint in sequence from top to bottom, the support plate and the short splint The splint is connected and attached to the surface of the long splint, so that the surface of the short splint and the long splint are in the same plane.

According to the above-mentioned aspect and any possible implementation mode, an implementation mode is further provided, the short splint and the long splint both include vertically connected transverse plates and vertical plates, and the board surface of the transverse plate of the short splint and the The first height adjustment assembly is arranged between the first pressing parts; the second height adjustment assembly is arranged between the surface of the transverse plate of the long splint and the second pressing parts, and The vertical boards of the short splint and the long splint are in the same vertical plane, and are arranged in close contact with the rear surface of the laminate.

According to the above-mentioned aspect and any possible implementation mode, an implementation mode is further provided, the long splint and the short splint both include vertically connected transverse plates and vertical plates, and the board surface of the transverse plate of the long splint is connected to the The first height adjustment assembly is arranged between the first pressing members; the second height adjustment assembly is arranged between the surface of the transverse plate of the short splint and the second pressing member, and The vertical plates of the long plywood and the short plywood are in the same vertical plane, and are arranged in close contact with the rear surface of the laminated board.

According to the above aspect and any possible implementation manner, an implementation manner is further provided, wherein the long plywood is provided with a visible window opening corresponding to the damage position on the laminated board.

According to the above aspect and any possible implementation manner, an implementation manner is further provided, wherein the surface of the transverse plate is the same shape as the spacer.

The present invention also provides a test method for a compression test device for a laminate, said method is implemented using a compression test device for a laminate, comprising the steps of:

S1. According to the height of the laminate, select a spacer with a corresponding thickness, and connect the short splint, support plate and long splint of the first clamping assembly;

S2. installing the laminate;

S3. Fixing and connecting the long splint, the support plate and the short splint of the second clamping assembly;

S4. Fix and connect the long splints and short splints of the first and second clamping components on both sides of the laminate, and clamp the laminate between the first and second clamping components;

S5. Perform a compression test on the laminated board, and record the corresponding test results.

Beneficial technical effect of the present invention

The embodiment provided by the present invention is a compression test device for a laminate, which is used for an aircraft, and is used for an aircraft. The device includes: a first and a second pressure member, a first and a second clamping assembly, and a first and a second height adjustment assembly; wherein, the first pressure-applying member and the second pressure-applying member are arranged coaxially and at a certain distance, and are used to provide vertical pressure to the laminate during the compression test; the The laminate is arranged between the first pressing member and the second pressing member, and the first clamping assembly and the second clamping assembly are arranged symmetrically on the front and rear surfaces of the laminate, and the first and second clamping The component is used to clamp the laminate; the first adjustment component is arranged between the first and second clamping components and the first pressure member, and/or, the first and second The second height adjusting assembly is arranged between the clamping assembly and the second pressing member. In the device of the present invention, the device can be adapted to laminates of various sizes and configurations by adding pads, which increases the applicability of the device and reduces the test cost; while ensuring the strength of the device, it uses reinforcing ribs to reduce the weight of the device. The weight of the test piece is simple to install, and the rapid installation of test pieces of laminated boards of various sizes is realized, the test period is reduced, and the test efficiency is improved.

Description of drawings

Hereinafter, embodiments of the present invention will be described in detail in conjunction with the accompanying drawings, wherein:

Fig. 1 is the structural representation of test device in the embodiment of the present invention;

Fig. 2 is the structural representation of long splint in the embodiment of the present invention;

Fig. 3 is the structural representation of short splint in the embodiment of the present invention;

Fig. 4 is the structural representation of support plate in the embodiment of the present invention;

Fig. 5 is the schematic structural view of the platen in the embodiment of the present invention;

Fig. 6 is a schematic structural view of the pad in the embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments, but the embodiments of the present invention are not limited thereto.

As shown in Figure 1, the present invention provides a compression test device for laminated boards, which is used for aircraft, and the device includes: first and second pressure members, first and second clamping components, and the first first and second height adjustment assemblies; wherein,

The first pressing member and the second pressing member are arranged coaxially and at a certain distance, and are used to provide vertical pressure to the laminate 6 during the compression test;

The laminate 6 is arranged between the first pressing member and the second pressing member, and the first clamping assembly and the second clamping assembly are arranged symmetrically on the front and rear surfaces thereof, and the first and second clamping assemblies are arranged symmetrically. Two clamping components are used to clamp the laminate 6;

The first height adjustment assembly is arranged between the first and second clamping assemblies and the first pressing member, and/or, between the first and second clamping assemblies and the second pressing member The second height adjustment assembly is arranged between them, wherein the laminate 6 is a large-scale composite laminate test piece with damage. Composite laminates 6 will suffer from delamination, opening, scratches and other damages during the manufacturing and use process. The influence of the strength performance of the laminated board 6 makes the test pieces exist in various dimensional configurations, and the test device of the present invention can be used to test the test pieces in various dimensional configurations by using a height adjustment component. The height adjustment assembly in the present invention is realized by pads.

The existing clamps in ASTM D6484 are only suitable for test pieces with a length of 300mm and a width of 36mm, and the clamps are separated from the upper and lower pressure plates, so they cannot be applied to test pieces of other sizes by adding spacers. For larger test pieces, if the fixture is designed with reference to the fixture form in ASTM D6484, its overall mass will be large, and because the fixture is separated from the upper and lower pressure plates, the fixture needs to be assembled as a whole and placed on the testing machine, which is difficult to install . The test piece in the present invention may be of a large size, that is, a test piece with a length greater than 300 mm and a length of up to 1000 mm. Because the size of the test piece is more, such as 400mm, 410mm, 420mm, if every size makes a set of test device cost too high, therefore, the test device specification of the present invention is applicable to the length of 400mm, and for the length of 410mm For the length of the laminate, place a 5mm thick spacer on the upper and lower platens; for a laminate length of 420mm, place a 10mm thick spacer on the upper and lower platens. But the block should not be too thick, otherwise the test effect will not be good, generally not more than 30mm. For pads whose thickness is required to exceed 30mm, that is, if the difference is too much, such as 500mm, a 400mm test device needs to be placed with 50mm thick pads on the top and bottom. Blocks are used to fit test pieces with a length of 510 mm or 520 mm.

In the present invention, the long and short splints are designed to be L-shaped, so that the long and short splints can be connected with the upper and lower pressure plates through bolts, so that different thickness pads can be added to adapt to test pieces of various sizes. In addition, the L-shaped long and short splints are connected with the upper and lower pressure plates, so that when replacing the test piece, it is only necessary to loosen the connecting bolts between the long and short splints on one side and the upper and lower pressure plates, pull out the test piece, and then tighten the bolts, which is convenient for installation.

Preferably, the first pressure member is the upper pressure plate 1, and the second pressure member is the lower pressure plate 7, and the upper pressure plate 1 and the lower pressure plate 7 are used for performing a compression test on the laminate 6, The external test machine is connected to provide vertical pressure during compression loading.

Preferably, the first and second height adjustment assemblies each include at least one spacer 2 and all of the spacers 2 have the same or different thicknesses according to the heights of laminates 6 of different sizes or large sizes. choose. The maximum thickness of the spacer should not exceed 30mm. It is preferable to use 5mm, 10mm and other spacers. When using spacers of the same thickness, the upper and lower pressure plates should be set up, so that the damage position on the test piece is consistent with the position of the observation port opened on the long splint. The height center of the device, the structure of the long splint is described in detail below.

Preferably, the first clamping assembly arranged on the front side of the front surface of the laminated board 6 sequentially includes a first short splint 5, a first support plate 4 and a first long splint 3 from top to bottom, and the first support The plate 4 is connected to the first short splint 5 and attached to the surface of the first long splint 3 so that the first long splint 3 and the surface of the first short splint 5 are in the same vertical plane . The first support plate 4 makes the surface of the first long splint 3 and the first short splint 5 in the same vertical plane during the whole test process, so as to have a good fit with the surface of the test piece and provide lateral restraint for the test piece , to prevent the test piece from bending during the compression test.

Preferably, the second clamping assembly arranged on the back side of the rear surface of the laminated board 6 includes a second long splint 3, a second support plate 4 and a second short splint 5 in order from top to bottom, and the second support plate 4 is connected to the second short splint 5 and attached to the surface of the second long splint 3, so that the second short splint 5 and the surface of the second long splint 3 are in the same vertical plane. Such a structural arrangement makes the gap positions between the second long splint 3 and the second short splint 5 be located at different positions in the height of the test piece, thereby providing better lateral restraint for the laminate 6 test piece and preventing it from bending.

Preferably, the first short splint 5 and the first long splint 3 of the first clamping assembly each include a horizontal plate and a vertical plate connected vertically, and the surface of the transverse plate of the first short splint 5 is connected to the A first height adjustment assembly is arranged between the upper platen 1, and this assembly may include one or more spacers 2, each spacer 2 has the same or different thickness and the same shape as the surface of the transverse plate, and Fix the plate surface of the transverse plate by bolts; a second height adjustment assembly is arranged between the plate surface of the transverse plate of the second long splint 3 and the lower pressure plate 7, and the assembly may include one and The above number of spacers 2, the thickness of each spacer 2 is the same or different, the shape is the same as the plate surface of the transverse plate, and is fixed with the plate surface of the transverse plate by bolts, and the first short splint 5 It is in the same vertical plane as the vertical board of the first long splint 3 and is arranged in close contact with the front surface of the laminated board 6 .

Preferably, the second long splint 3 and the second short splint 5 of the second clamping assembly each include a horizontal plate and a vertical plate connected vertically, and the surface of the transverse plate of the second long splint 3 is connected to the The first height adjustment assembly is arranged between the upper platen 1, and this assembly may include one or more spacers 2, each spacer 2 has the same or different thickness, and the shape is the same as the surface of the transverse plate , and fixed with the plate surface of the transverse plate by bolts; a second height adjustment assembly is set between the plate surface of the transverse plate of the second short splint 5 and the lower pressure plate 7, and the assembly may include one and For the spacers 2 of the above quantity, the thickness of each spacer 2 is the same or different, and the shape is the same as the surface of the transverse plate, and each spacer 2 is fixed to the surface of the transverse plate by bolts, and at the same time, the The vertical plates of the long splint and the short splint are in the same vertical plane, and are arranged in close contact with the rear surface of the laminated plate 6 .

Preferably, as shown in Fig. 2 and Fig. 3, reinforcing ribs are arranged between the described transverse plates and vertical plates of the long splint and the short splint, so that the quality of the test device is reduced while ensuring the strength, so as to improve the installation efficiency.

Preferably, the surface of the transverse plate is the same shape as the spacer. If the shape is the same, the bolts can be used to better connect and fix the long splint, short splint, and pads with the upper and lower pressure plates, and prevent the long splint, short splint, and pad from sliding relative to each other during the test.

As shown in FIG. 2 , the structures of the first long splint and the second long splint are exactly the same, and the long splint 3 includes L-shaped transverse plates, vertical plates and reinforcing ribs. Slots are slotted on the transverse plate, and the size and position of the slots correspond to the positions and sizes of the threaded holes on the upper and lower pressure plates, so as to connect the long splint with the upper and lower pressure plates through bolts. There is a rectangular viewing window opening on the vertical plate, the size and position of which correspond to the damage size and position of the laminate 6 as the test piece, and are used to observe and monitor the damage on the test piece during the test. There is also a triangular notch or notch on the vertical plate, whose shape and size match the triangular protrusion on the short splint 5, and the triangular protrusion and notch are arranged at the connection gap between the long and short splints, so that the test piece can also be obtained Lateral support prevents bending. The long splint 3 has bolt holes on both sides, and its size and position correspond to the bolt holes on both sides of the short splint 5, so that the long and short splints are connected by bolts. The cross-sectional shape of the reinforcing rib is trapezoidal, which is used to increase the rigidity and strength of the test device.

The test device of the present invention is an improvement to the existing ASTM D6484 clamps, by providing a visual window opening on the long splint 3 at a position corresponding to the damaged position of the laminate 6, as an observation port, for passing through the opening in the test During the process, observe and monitor the damage condition of the laminated board 6.

As shown in FIG. 3 , the structures of the first and second short splints 5 are identical, and both include L-shaped transverse plates, vertical plates and reinforcing ribs. Groove on the transverse plate, the size and position of the groove correspond to the position and size of the threaded holes on the upper and lower pressure plates, so that the short splint 5 is connected with the upper and lower pressure plates by bolts. Triangular projections are arranged on the vertical plate, and its shape and size match with the triangular notches or notches on the long splint 3 . The short splint 5 has bolt holes at the positions of the two sides, and its size and position correspond to the bolt holes provided on the two sides of the long splint 3, so that the long and short splints are connected by bolts. Simultaneously, there is a threaded hole in the middle of the short splint 5, and its size and position correspond to the middle bolt hole of the support plate 4, so that the support plate 4 and the short splint 5 are connected by bolts. The cross-sectional shape of the reinforcing rib is trapezoidal, which is used to increase the rigidity and strength of the test device.

As shown in Figure 4, the structure of the first and the second support plate 4 is exactly the same, all rectangular, its width is identical with the width of the long and short splints, and the height is a triangular notch that can cover the long splint 3 after the device is assembled. The opening on the support plate 4 is consistent with the opening on the top of the short splint 5, and can be connected with the short splint 5 by bolts.

As shown in Figure 5, the structure of the upper platen and the lower platen are exactly the same, and the platen includes a circular plate surface, a vertical rod and a transition section. There are threaded holes on the circular disc surface, the size and position of which correspond to the slotted positions of the long and short splints on both sides of the test piece, so as to connect the pressure plate with the long and short splints through bolts. The vertical bar structure is adapted to the testing machine used for connection to the testing machine. The transition section is the transition from the circular disk to the vertical rod, and is a cylinder with decreasing diameter to reduce the stress concentration of the pressure disk.

As shown in FIG. 6 , the spacer 2 is rectangular, and its length and width match the dimensions of the transverse plates of the long and short splints. Slots are slotted on the block 2, and the slot size and position are consistent with the slot positions on the long and short plywood transverse plates.

In the device of the present invention, the parts are connected by bolts, and the cushion block 2 is placed between the upper platen 1 and the second long splint 3 on one side of the test piece, and the first short splint 5 and the upper press plate on the other side of the test piece. between the disks 1 and fixed by bolts, the support plate 4 is connected with the first short splint 5 by bolts, and is attached to the surface of the first long splint 3 to ensure that the first long splint 3 and the first short splint 5 are on the same plane Inside, the first and second long splints 3 and the first and second short splints 5 on both sides of the laminate 6 are connected by bolts, and the upper platen 1 is connected with the test loading equipment to realize the loading function.

The first and second long splints 3, the first and second short splints 5 and the first and second support plates 4 are used in pairs. Gaps are provided between the long 3 and short 5 splints and the laminate 6 in order to minimize frictional effects. For laminated board test pieces of different sizes, pads 2 are added between the upper platen 1 and the first long splint 3 and the second short splint 5 to ensure that the overall length of the device is consistent with the length dimension of the laminated plate 6 test piece match. Further, design reinforcing ribs on the first long plywood 3 and the second short plywood 5 to reduce the mass or weight while ensuring the strength, and because the first long plywood 3 and the second short plywood 5 are connected with the upper platen 1, the layer When the pressure plate 6 is installed, it is only necessary to loosen the connecting bolts between the first long splint 3 and the second short splint 5 and the connecting bolts with the upper platen 1, and insert the laminate 6 into the first long splint 3 and the second short splint 5 Just in between, easy to install.

The present invention also provides a test method for a laminated board compression test device, which is realized by using a laminated board compression test device, comprising the following steps:

S1. According to the height of the laminate, select a spacer with a corresponding thickness, and connect the short splint, support plate and long splint of the first clamping assembly;

S2. installing the laminate;

S3. Fixing and connecting the long splint, the support plate and the short splint of the second clamping assembly;

S4. Fix and connect the long splints and short splints of the first and second clamping components on both sides of the laminate, and clamp the laminate between the first and second clamping components;

S5. Perform a compression test on the laminated board, and record the corresponding test results.

The specific test steps are as follows:

1) Select pads 2 of different thicknesses according to the length and size of the laminated plate 6 test piece, connect the second short splint 5 and pad 2 on one side (front side) with the upper platen 1, and connect the second long splint 3 and pad 2 is connected with the lower pressure plate 7, the second support plate 4 is connected with the second short splint 5 and the second long splint 3 by bolts, and ensures that the sides of the second long splint 3, the second short splint 5 and the spacer 2 are on the same on flat surface;

2) Laminate 6 is installed as a test piece;

3) Install the first long splint 3, the first short splint 5, the first support plate 4, and the cushion block 2 on the other side (rear side), wherein the first long splint 3 and the cushion block 2 are connected to the upper platen 1, The first short splint 5 and the cushion block 2 are connected to the lower pressure plate 7;

4) Connect the first short plywood on both sides with the second long plywood, the bolt holes on the first long plywood and the second short plywood by bolts;

5) A compression test is performed on the laminated board 6 .

In addition, after the test of this laminated board 6 is finished, if it is necessary to test laminated boards 6 of other lengths, it is only necessary to remove the bolts of the long splint 3 and the short splint 5 on one side (such as the rear side) when replacing the test piece. And unclamp the bolts that the rear side long and short splints are connected with the upper and lower pressure plates, extract the tested laminate 6, insert a new laminate 6 test piece, repeat 3)-5) steps and get final product.

The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the forms disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various Various other combinations, modifications and environments, and can be changed through the above teaching or technology or knowledge in the related field within the scope of the application concept of the present invention. However, changes and changes made by those skilled in the art do not depart from the spirit and scope of the present invention, and should all be within the protection scope of the appended claims of the present invention.

Claims (10)

1. A compression test apparatus for a laminate, the apparatus comprising: first and second pressure members, first and second clamping assemblies, and first and second height adjustment assemblies; wherein,,

the first pressing piece and the second pressing piece are coaxial and are arranged at a certain distance, and are used for providing pressure in the vertical direction for the laminated board during a compression test;

the laminated board is arranged between the first pressing piece and the second pressing piece, the front surface and the rear surface of the laminated board are symmetrically provided with the first clamping component and the second clamping component, and the first clamping component and the second clamping component are used for clamping the laminated board;

the first height adjustment assembly is disposed between the first and second clamping assemblies and the first compression member, and/or the second height adjustment assembly is disposed between the first and second clamping assemblies and the second compression member.

2. The compression test apparatus for a laminate of claim 1, wherein the first pressure applying member is an upper platen and the second pressure applying member is a lower platen.

3. The compression test apparatus for a laminate of claim 1, wherein the first and second height adjustment assemblies each comprise at least one and more spacer blocks.

4. A compression test apparatus for a laminate according to claim 3, wherein the first clamping assembly comprises, in order from top to bottom, a short clamping plate, a support plate and a long clamping plate, the support plate being connected to the short clamping plate and conforming to a surface of the long clamping plate such that the long clamping plate and the surface of the short clamping plate are in the same vertical plane.

5. A compression test apparatus for a laminate according to claim 3, wherein the second clamping assembly comprises, in order from top to bottom, a long clamping plate, a support plate and a short clamping plate, the support plate being connected to the short clamping plate and conforming to the surface of the long clamping plate such that the short clamping plate is in the same plane as the surface of the long clamping plate.

6. The compression test apparatus for laminated boards according to claim 4, wherein the short clamping plate and the long clamping plate each comprise a transverse plate and a vertical plate which are vertically connected, and the first height adjusting assembly is provided between the plate surface of the transverse plate of the short clamping plate and the first pressing member; the second height adjusting assembly is arranged between the plate surface of the transverse plate and the second pressing piece of the long clamping plate, and the vertical plates of the short clamping plate and the long clamping plate are arranged in the same vertical plane and are attached to the rear surface of the laminated plate.

7. The compression test apparatus for laminated boards according to claim 5, wherein the long clamping plate and the short clamping plate each comprise a transverse plate and a vertical plate which are vertically connected, and the first height adjusting assembly is provided between the plate surface of the transverse plate of the long clamping plate and the first pressing member; the second height adjusting assembly is arranged between the plate surface of the transverse plate and the second pressing piece of the short clamping plate, and the vertical plates of the long clamping plate and the short clamping plate are arranged in the same vertical plane and are attached to the rear surface of the laminated plate.

8. The compression test apparatus for laminated boards according to claim 4, wherein the long clamping plate is provided with a visible window opening corresponding to a damaged position on the laminated board.

9. The compression test apparatus for a laminated board according to claim 6 or 7, wherein the plate surface of the lateral plate is the same shape as the pad.

10. A test method of a compression test apparatus for a laminate, the method being implemented using the compression test apparatus for a laminate according to any one of claims 1 to 9, comprising the steps of:

s1, selecting a cushion block with corresponding thickness according to the height of a laminated board, and fixedly connecting a short clamping plate, a supporting plate and a long clamping plate of a first clamping assembly;

s2, installing the laminated board;

s3, fixedly connecting a long clamping plate, a supporting plate and a short clamping plate of the second clamping assembly;

s4, fixedly connecting a long clamping plate and a short clamping plate of the first clamping assembly and the second clamping assembly on two sides of the laminated board, and clamping the laminated board between the first clamping assembly and the second clamping assembly;

s5, carrying out compression test on the laminated board, and recording corresponding test results.