CN115855645A - Mold for repairing structural adhesive and performance test evaluation method after structural adhesive is repaired - Google Patents

Abstract

The invention relates to a mold for repairing structural adhesive and a performance test evaluation method after repairing the structural adhesive, and belongs to the technical field of measuring adhesion between materials. The mould for repairing the structural adhesive comprises a mould body and a side baffle, wherein a plurality of through grooves are formed in the mould body, the through grooves penetrate through the upper end face, the lower end face and one side face of the mould body, and the side baffle is arranged on the side face penetrating through the through grooves. The performance test evaluation method after the structural adhesive is repaired comprises the following steps of: 1) Manufacturing an original joint; 2) Cutting; 3) Surface treatment; 4) Repairing; 5) Then carrying out a tensile test or a shear test on the repaired joint obtained in the step 4), and recording a damage position; 6) And (6) evaluating. The performance test evaluation method after structural adhesive repair is suitable for evaluating the performance of applying the repair structural adhesive on the cured structural adhesive.

Description

Mold for repairing structural adhesive and performance test evaluation method after structural adhesive is repaired

Technical Field

The invention relates to a mold for repairing structural adhesive and a performance test evaluation method after repairing the structural adhesive, and belongs to the technical field of measuring adhesion between materials.

Background

With the progress of high-speed and light-weight equipment, light-weight composite materials, inorganic nonmetal materials such as ceramic glass, organic materials such as PC, light-weight metals, and the like have been used in large quantities. The materials such as composite materials, ceramic glass, PC and the like are difficult to weld due to characteristics, damage can be caused through mechanical connection, and the like, so that the structural adhesive gradually has wide application prospects. Structural glue is mostly used for bonding at present for non-main bearing parts, and meanwhile, the sealing function can be achieved.

However, the structural adhesive is an organic substance, on one hand, the aging of the structural adhesive is accelerated due to the severe environment in the service process of the equipment, on the other hand, the structural adhesive is not as strong as a welding adhesive block or a riveting mechanical adhesive block, and particularly, the bonding interface is weak, so that failure probability events are inevitably generated. After the structural adhesive is aged or fails, the aged failure part can be cut off, the service life of the structural adhesive can be prolonged by adopting a new structural adhesive to repair, and the performance of the repaired structural adhesive is verified by an adhesive and base material matching test.

Currently, the test for the compatibility of an adhesive with a substrate includes a tape peeling test (DVS 1618 and ISO 21194), an adhesive block-to-block stretching (GB/T6329), and an adhesive tensile shear strength (GB/T7124). The DVS 1618 and ISO21194 adhesive tape peeling test method is to apply an adhesive on a substrate, then use olecranon pliers and a cutter to pull and cut while exposing an interface continuously, and record the type of adhesive joint failure, namely adhesive failure, cohesive failure or adherend failure, so as to investigate the adhesive effect. Because the cured structural adhesive belongs to a soft base material, it is extremely difficult to control all the cured structural adhesive to fall on a repaired interface when a cutter is used for cutting, and therefore, the method is not suitable for evaluating the performance of the bonded interface when the repaired structural adhesive is bonded with the soft base material. Other tensile and shear test methods only specify the performance of the inspected glue, and do not specify the structural glue repair and verification method.

Disclosure of Invention

The present invention aims to provide a new technical solution to improve or solve the technical problems in the prior art as described above.

The technical scheme provided by the invention is as follows: the utility model provides a mould for structure is glued and is restoreed, includes mould body and side shield, be equipped with a plurality of grooves of lining up on the mould body, the groove of lining up link up the up end of mould body, terminal surface and a side down, the side shield keep off establish with the side that the groove of lining up link up.

On the basis of the technical scheme, the invention can be further improved as follows.

Furthermore, the die body is of a cuboid structure, and the through groove is square.

Furthermore, the die body is made of polytetrafluoroethylene materials.

The further scheme has the beneficial effects that the polytetrafluoroethylene is a material which is difficult to adhere, and the original joint is easy to demould after being solidified in the through groove.

Furthermore, a material for preventing adhesion is sprayed in the through groove.

The further scheme has the advantage that the original connector is easy to demould after being solidified in the through groove.

Furthermore, the upper end of the through groove comprises a first upper edge and a second upper edge, the lower end of the through groove comprises a first lower edge and a second lower edge, and the first upper edge, the second upper edge, the first lower edge and the second lower edge of the through groove all adopt circular arc structures.

The further scheme has the advantages that the contact area between the solidified rubber blocks and the lining plate is increased, so that the contact area between the solidified rubber blocks and the lining plate is larger than the middle size of the rubber blocks, the interface bonding force between the solidified rubber blocks and the lining plate is increased, the probability of separation of the solidified structural rubber blocks and the lining plate in the subsequent test process is reduced, and the original joint is subjected to cohesive failure during the test as much as possible.

A performance test evaluation method after structural adhesive repair comprises the following steps:

1) Manufacturing an original joint: firstly, a plurality of lining plates are arranged on a test bed in a clearance mode, the number and the spacing of the lining plates arranged on the test bed are matched with those of through grooves in a mould for structural adhesive repair, then the mould for structural adhesive repair is placed on the lining plates, side baffles are arranged on the sides of the through grooves in a blocking mode, structural adhesive is filled into the through grooves, another lining plate is placed above the through grooves, the lining plates above and below the through grooves and the side baffles are oppositely extruded, redundant structural adhesive is extruded out of the through grooves, the side baffles are moved away after the structural adhesive is solidified, and original joints with the lining plates are taken out of a mould body from the sides of the through grooves;

2) Cutting: cutting the original joint obtained in the step 1) from the middle, and dividing the original joint into two original rubber blocks;

3) Surface treatment: performing surface treatment for improving the cohesiveness on the cutting surface of the original rubber block obtained in the step 2) to obtain a surface treatment sample block;

4) Repairing: placing an original glue block into a through groove of a mould for repairing the structural glue, placing a side baffle, filling the residual space of the through groove with the repairing structural glue, covering a lining plate on one side where the repairing structural glue is placed, and pressing the lining plate and the side baffle so as to ensure that the repairing structural glue is fully contacted with a cutting surface of the original glue block and simultaneously ensure that the repairing structural glue is fully contacted with the lining plate covered on the repairing structural glue, and obtaining a repairing joint combining the original glue block and the repairing glue block after the repairing structural glue is solidified;

5) Then carrying out a tensile test or a shear test on the repaired joint obtained in the step 4), and recording a damage position;

6) The evaluation method comprises the following steps: and judging whether the performance of the repaired joint meets the use requirement or not according to the damage position.

Further, the surface treatment in the step 3) is plasma treatment, and the plasma surface treatment is carried out by using a plasma generator, wherein the focal distance is 10mm, and the treatment time is 10-15 seconds.

Further, the surface treatment in the step 3) is carried out by using a base coat or an activating agent.

The beneficial effect of adopting above-mentioned further scheme is, improves the cohesiveness of cutting face.

Further, the repairing process of the step 4) is carried out within thirty minutes after the surface treatment is carried out on the cutting surface of the structural adhesive sample block.

Further, the joint surface where the original rubber block and the repair rubber block are combined is a repair interface, and in step 6), if the damage position is located on the repair interface, the strength of the repair joint is lower than that of the original joint; if the damage position is located on one side of the repair rubber block of the repair joint, the strength of the repair joint is lower than that of the original joint; if the failure location is on one side of the original block of glue of the repaired joint, the strength of the repaired joint is higher than the strength of the original joint.

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

1. the method for testing and evaluating the performance of the repaired structural adhesive is suitable for evaluating the performance of the repaired structural adhesive applied on the cured structural adhesive, and the method for testing and evaluating the performance of the repaired structural adhesive under the laboratory condition is completed through the steps of die manufacturing, original joint manufacturing, structural adhesive repairing, test verification, evaluation and the like.

2. The mould for repairing the structural adhesive can be used for simultaneously manufacturing a plurality of original joints, and the original joints obtained by the mould for repairing the structural adhesive are square in shape and have a more square shape than the original joints obtained by a cutting mode due to the fact that the structural adhesive is soft, and the size of the original joints is consistent with that of the structural adhesive for repairing. In addition, the through groove penetrates through one side face of the die body, and the whole demoulding of the solidified original joint can be realized.

Drawings

Fig. 1 is a schematic structural view of a mold for repairing structural adhesive according to the present invention;

FIG. 2 is a schematic structural diagram of a mold for repairing structural adhesives with a round corner structure according to the present invention;

FIG. 3 is a front view of the mold body of FIG. 2 of the present invention;

FIG. 4 is a schematic structural view of a virgin joint of the present invention molded using the mold of FIG. 1;

FIG. 5 is a schematic structural view of a virgin joint of the present invention molded using the mold of FIG. 2;

FIG. 6 is a schematic diagram of the structure of the original block of glue of the present invention after cutting the original joint of FIG. 5 into two halves;

FIG. 7 is a schematic structural view of a repair joint of the present invention molded using the mold of FIG. 2;

FIG. 8 is a schematic view of the clamping block of the present invention;

FIG. 9 is a schematic illustration of a tensile test conducted on a repaired joint of the present invention;

FIG. 10 is a schematic illustration of a shear test performed on a repaired joint of the present invention;

in the figure, 1, a die body; 2. a liner plate; 3. a side dam; 4. a through groove; 401. a first upper edge; 402. a second upper edge; 403. a first lower edge; 404. a second lower edge; 5. an original joint; 6. original rubber blocks; 7. repairing the rubber block; 8. repairing the joint; 9. repairing the interface; 10. a circular arc structure; 11. a clamping block; 12. t-shaped grooves.

Detailed Description

The principles and features of this invention are described below in conjunction with examples, which are set forth to illustrate, but are not to be construed to limit the scope of the invention.

As shown in fig. 1 to 3, the mold for repairing structural adhesive comprises a mold body 1 and a side baffle 3, wherein a plurality of through grooves 4 are formed in the mold body 1, the through grooves 4 penetrate through the upper end surface, the lower end surface and one side surface of the mold body 1, and the side baffle 3 is arranged on the side surface penetrating through the through grooves 4.

The die body 1 is of a cuboid structure, and the through grooves 4 are square. In the present embodiment, the thickness of the die body 1 is 10 to 20mm, and the size of the through groove 4 is 10mm × 10mm, 15mm × 15mm, or 20mm × 20mm, and a sample block having a size of 10mm × 10mm, 15mm × 15mm, or 20mm × 20mm can be manufactured by the die having the above-described size.

The die body 1 is made of materials which are not easy to be bonded with structural adhesive, such as polytetrafluoroethylene materials which are difficult to be bonded, and the original joint 5 is easy to demould after being solidified in the through groove 4. Of course, in order to make it easy to release the original joint 5 after it is solidified in the through groove 4, other methods such as spraying a material for preventing adhesion into the through groove 4 or wrapping the die body 1 with a transparent tape may be used.

As shown in fig. 1 to 10, a method for testing and evaluating performance of a repaired structural adhesive includes the following steps:

1) Manufacturing an original joint 5: firstly, a plurality of lining plates 2 are arranged on a test bed in a clearance mode, the number and the spacing of the lining plates 2 arranged on the test bed are matched with the through grooves 4 on the mould for structural adhesive repair, then the mould for structural adhesive repair is arranged on the lining plates 2, the side baffle plates 3 are arranged on the side faces of the through grooves 4 in a blocking mode, structural adhesive is filled into the through grooves 4, the other lining plate 2 is arranged above the through grooves 4, the lining plates 2 and the side baffle plates 3 above and below the through grooves 4 are extruded in opposite directions, redundant structural adhesive is extruded out from the clearances between the through grooves 4 and the lining plates 2 and between the through grooves 4 and the side baffle plates 3, the side baffle plates 3 are moved away after the structural adhesive is solidified, and the original joints 5 with the lining plates 2 are taken out of the mould body 1 from the side faces of the through grooves 4;

filling gaps and corners of the through grooves 4 with a clean tool, wherein the volume of the structural adhesive is larger than that of the through grooves 4, so as to ensure that complete original joints 5 are obtained; the side baffle 3 can be fixed on one side of the die body 1 by a clamp, and the extruded glue layer in the sample preparation process does not need to be cut off, so that the possibility of cracking from the interface of the combination of the lining plate 2 and the structural glue is reduced.

The lining plate 2 is made of materials which are easy to be bonded with structural adhesive, and the bonding property of the lining plate 2 and the structural adhesive can also be improved by adopting a surface treatment process capable of improving the bonding property. However, in the subsequent test process, the cured structural adhesive still has the possibility of being separated from the lining board 2, and in order to increase the interface bonding force between the cured adhesive block and the lining board 2, the first upper edge 401, the second upper edge 402, the first lower edge 403 and the second lower edge 404 of the through slot 4 all adopt the circular arc structure 10, the first upper edge 401 and the second upper edge 402 are located at the upper end of the through slot 4, and the first lower edge 403 and the second lower edge 404 are located at the lower end of the through slot 4. The design of the circular arc structure 10 can increase the contact area between the solidified rubber block and the lining plate 2, so that the contact area between the solidified rubber block and the lining plate 2 is larger than the middle size of the rubber block, the interface bonding force between the solidified rubber block and the lining plate 2 is increased, the probability that the solidified structural rubber block is separated from the lining plate 2 in the subsequent test process is reduced, and the original joint 5 is subjected to cohesive failure during the test as far as possible.

2) Cutting: cutting the original joint 5 obtained in the step 1) from the middle, and dividing the original joint into two original rubber blocks 6;

3) Surface treatment: performing surface treatment for improving the cohesiveness on the cutting surface of the original rubber block 6 obtained in the step 2) to obtain a surface treatment sample block;

surface treatments are applied to the cut surface, including but not limited to primers matched to the structural adhesive, activators, and plasma treatments to improve the adhesion of the cut surface. It is recommended to treat the surface with plasma, since the plasma does not introduce other material information. The portable plasma generator is adopted for plasma treatment, the parameters are that the focal length is about 10mm, and the treatment time is 10-15 seconds. Other stationary plasma generators and the like may also be used.

The surface of the structural adhesive is similar to a rubber product after solidification, the structural adhesive is difficult to repair or the quality of the structural adhesive after repair cannot be guaranteed, the base coat and the activator play a role in mediating and have a certain effect of enhancing the adhesion, but the structural adhesive is hard and brittle after solidification and is not the best choice. The plasma treatment is that the oxygen in the air is excited by the emission of plasma through equipment to be ozone and high-activity oxygen ions, the oxygen ions impact the surface of the base material to form covalent bonds with the surface of the base material, namely oxygen-containing functional groups have extremely high polarity and are beneficial to the bonding effect, and the interface is not isolated by a hard layer, so that the plasma treatment has a better effect.

4) Repairing: placing an original glue block 6 into a through groove 4 of a mould for structural glue repair, placing a side baffle 3, then filling the residual space of the through groove 4 with repair structural glue, covering a lining plate 2 on one side where the repair structural glue is placed, and pressing the lining plate 2 and the side baffle 3 to ensure that the repair structural glue is fully contacted with a cutting surface of the original glue block 6 and simultaneously ensure that the repair structural glue is fully contacted with the lining plate 2 covered on the repair structural glue, and obtaining a repair joint 8 formed by combining the original glue block 6 and a repair glue block 7 after the repair structural glue is solidified;

more specifically, the original rubber block 6 processed in the step 3) is placed in a mould for structural rubber repair within 10min again, so that the repair rubber block 7 and the original rubber block 6 have the same cross sectional area, and the misalignment of a result criterion caused by the difference of cutting cross sectional areas is avoided. Therefore, a half space in the through groove 4 is used for applying the repairing structural adhesive, and the side baffle 3 and the die body 1 are closed and clamped by a clamp. According to the repairing condition, the same structural adhesive or different structural adhesives can be selected, the repairing structural adhesives are applied to the remaining half space of the through groove 4, the repairing structural adhesives are required to be filled with the gap corners, then the lining plate 2 subjected to the adhesion increasing treatment is covered on the through groove 4 and pressed, the repairing structural adhesives are ensured to be in full contact with the interface of the original adhesive block 6, and the repairing joint 8 is taken out after the repairing structural adhesives are solidified.

In addition, according to the working condition, the same structural adhesive as the original adhesive block 6 can be selected for the repair structural adhesive, or a different structural adhesive different from the original adhesive block 6 can be selected for the repair structural adhesive.

5) Then carrying out a tensile test or a shear test on the repaired joint 8 obtained in the step 4), and recording the damage position;

as shown in fig. 8-10, a test tool for a tensile test or a shear test includes clamping blocks 11, T-shaped grooves 12 are provided in the clamping blocks 11, the two clamping blocks 11 are respectively sleeved at two ends of a repair joint 8, where a lining plate 2 is provided, when the tensile test is performed, vertical tensile forces are respectively applied to the clamping blocks 11 provided at the two ends of the repair joint 8, the applied tensile forces are uniformly distributed over the width of the repair joint 8 and are separated at a constant speed until the repair joint 8 is broken and separated, and the magnitude and the speed of the applied tensile forces and the position where the repair joint 8 is broken are recorded at the same time; when the shear test is carried out, shear forces in the left-right direction are respectively applied to the clamping blocks 11 arranged at the two ends of the repaired joint 8, the applied shear forces are uniformly distributed in the height direction of the repaired joint 8 and are separated at a constant speed until the repaired joint 8 is broken and separated, and the magnitude and the speed of the applied shear forces and the broken position of the repaired joint 8 are recorded at the same time.

6) The evaluation method comprises the following steps: and judging whether the performance of the repair joint 8 meets the use requirement according to the damage position.

The combined surface of the original rubber block 6 and the repair rubber block 7 is a repair interface 9, in the step 6), the strength of the repair joint 8 is not lower than that of the original joint 5, and the requirements are met no matter where the damage interface is located; the strength of the repaired joint 8 is lower than that of the original joint 5, and the repaired joint is damaged on the repaired interface 9 but meets the requirement; the strength of the repair joint 8 is lower than that of the original joint 5, and the repair joint is damaged on the repair rubber block 7 or the bonding interface between the repair rubber block 7 and the lining plate 2, but the service requirement is met.

The original joint 5 is a test block which is pressed by a mould for repairing the structural adhesive for the first time, and has a strength result after testing. Repairing the joint 8 means that the original joint 5 is cut off from the middle knife to obtain two original rubber blocks 6, one of the original rubber blocks 6 is continuously placed in a mold, surface treatment for increasing the cohesiveness is carried out on the cutting surface of the original rubber block 6 through means of surface treatment and the like, or the surface treatment can be omitted on the cutting surface of the original rubber block 6, then repairing structural adhesive is applied to the remaining half space of the mold, the lining plate 2 is covered, and the repaired sample block with the same size is obtained.

The manufactured repair joint 8 needs to be subjected to a tensile or shearing test, and specific data such as tensile strength 5MPa is a numerical value result, and a damaged position exists after the repair joint 8 is broken, because the repair joint 8 is composed of two kinds of glue or one kind of glue, namely, the original glue block 6 and the repair glue block 7 are made of the same glue or different glues, theoretically, a repair interface 9 of the repair joint 8 is the weakest place, if the original glue block 6 and the repair glue block 7 of the repair joint 8 are made of different glues, the strengths of the original glue block 6 and the repair glue block 7 are different, and if the glue block with low strength is lower than that of the repair interface, the glue block with low strength is broken from the place with low strength. Therefore, the failure position needs to be recorded, the failure position is only used as a criterion, the main criterion is the strength result, the visual data does not judge the strength through the failure position, and the failure position can actually show the strength, but not a specific value.

The original joint 5 is first set to meet the design requirements for strength if the strength of the repaired joint is higher than the original joint strength.

For example, the following steps are carried out: if the original joint 5 is molded by using the glue A, the strength of the obtained original glue block 6 is 5MPa, the repair structural glue adopts the glue B, the strength of the obtained repair glue block 7 is 3MPa, and the strength of the repair joint 8 is not obviously higher than 5MPa; at this time, if the strength of the repair interface 9 is 4MPa, the failure site is only possible on the repair mass 7 or the bonded interface of the repair mass 7 and the backing plate 2. However, if the strength of the repair interface is 2MPa, the damage position is necessarily on the repair interface 9 or the bonding interface between the repair rubber block 7 and the liner plate 2, but whether the strength meets the requirement or not needs to be determined by combining the actual design use value.

Similarly, if the original joint 5 is formed by pressing the glue A, the strength of the obtained original glue block 6 is 3MPa, the repair structural glue is the glue B, the strength of the obtained repair glue block 7 is 5MPa, and the strength of the repair joint 8 is not obviously higher than 5MPa; if the strength of the repair interface 9 is 4MPa at this time, the failure site is only possible on the original block of glue 6, or the bonded interface of the original block of glue 6 and the backing plate 2. However, if the strength of the repair interface 9 is 2MPa, the interface is definitely damaged at the repair interface or the bonding interface between the repair rubber block 7 and the liner plate 2, but whether the strength meets the requirement or not needs to be determined by combining the actual design use value.

It should be further noted that the structural adhesive a is used to make the original joint 5 under the working condition, and after 5 years, the surface of the original joint 5 is aged or cracks and fails, and a surface aged layer or a failure part needs to be cut off, and then a new repairing structural adhesive is constructed to repair. This application utilizes the mould to make original joint 5, and the original joint 5 that obtains cuts from the centre, divides into two original gluey pieces 6, and the cutting plane of original gluey piece 6 has simulated the cut surface at on-the-spot trouble piece failure site, then continues to paint new restoration structure with this mould and glue and repair, utilizes the benefit of mould just can control the size balance, and unified drawing of patterns is handled.

The method is suitable for repair process verification and surface treatment process selection under laboratory conditions, different surface treatment processes can be adopted for the cutting surface of the original rubber block, different results are obtained no matter plasma treatment or an activating agent, a primer and the like, different results are obtained by adopting the operation method, different surface treatment modes are developed, and then the optimal process is selected for repair.

The method for testing and evaluating the performance of the repaired structural adhesive is suitable for evaluating the performance of the repaired structural adhesive applied on the cured structural adhesive, and the method for testing and evaluating the performance of the repaired structural adhesive under the laboratory condition is completed through the steps of die manufacturing, original joint manufacturing, structural adhesive repairing, test verification, evaluation and the like.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. The utility model provides a mould that restoration was glued to structure, its characterized in that includes mould body (1) and side shield (3), be equipped with a plurality of grooves (4) of lining up on mould body (1), lining up groove (4) link up the up end of mould body (1), terminal surface and a side, side shield (3) keep off establish with link up the side that groove (4) link up.

2. The structural adhesive repairing mold according to claim 1, wherein the mold body (1) is a rectangular parallelepiped structure, and the through groove (4) is square.

3. Mould for repairing structural glue according to claim 1 or 2, characterized in that said mould body (1) is made of polytetrafluoroethylene material.

4. The mold for repairing structural adhesives according to claim 1, wherein the through groove (4) is coated with a material for preventing adhesion.

5. The mold for repairing structural adhesives according to claim 1, wherein the upper end of the through slot (4) comprises a first upper edge (401) and a second upper edge (402), the lower end of the through slot (4) comprises a first lower edge (403) and a second lower edge (404), and the first upper edge (401), the second upper edge (402), the first lower edge (403) and the second lower edge (404) of the through slot (4) adopt the circular arc structure (10).

6. A method for testing and evaluating the performance of a repaired structural adhesive is characterized by comprising the mold for repairing the structural adhesive according to any one of claims 1 to 5, and the method comprises the following steps:

1) Manufacturing an original joint (5): firstly, a plurality of lining plates (2) are arranged on a test bed in a clearance mode, the number and the intervals of the lining plates (2) arranged on the test bed are matched with the through grooves (4) on the mould for repairing the structural adhesive, then the mould for repairing the structural adhesive is placed on the lining plates (2), the side baffles (3) are arranged on the side faces of the through grooves (4) in a blocking mode, the structural adhesive is filled into the through grooves (4), another lining plate (2) is placed above the through grooves (4), the lining plates (2) above and below the through grooves (4) and the side baffles (3) are oppositely extruded, redundant structural adhesive is extruded out of the through grooves (4), the side baffles (3) are moved away after the structural adhesive is solidified, and the original joints (5) with the lining plates (2) are taken out of the mould body (1) from the side faces of the through grooves (4);

2) Cutting: cutting the original joint (5) obtained in the step 1) from the middle to divide the original joint into two original rubber blocks (6);

3) Surface treatment: performing surface treatment for improving the adhesion on the cut surface of the original rubber block (6) obtained in the step 2);

4) Repairing: placing an original glue block (6) into a through groove (4) of a mould for structural glue repair, placing a side baffle (3), then filling the residual space of the through groove (4) with a repair structural glue, covering a lining plate (2) on one side where the repair structural glue is placed, and pressing the lining plate (2) and the side baffle (3) so as to ensure that the repair structural glue is fully contacted with a cutting surface of the original glue block (6) and simultaneously ensure that the repair structural glue is fully contacted with the lining plate (2) covered on the repair structural glue, and obtaining a repair joint (8) formed by combining the original glue block (6) and a repair glue block (7) after the repair structural glue is solidified;

5) Test verification: then carrying out a tensile test or a shear test on the repaired joint (8) obtained in the step 4), and recording the damage position;

6) The evaluation method comprises the following steps: and judging whether the performance of the repair joint (8) meets the use requirement according to the damage position.

7. The method for testing and evaluating the performance of the structural adhesive after repair according to claim 6, wherein the surface treatment in the step 3) is plasma treatment, the plasma surface treatment is performed by using a plasma generator, the focal distance is 10mm, and the treatment time is 10-15 seconds.

8. The method for evaluating the performance of the structural adhesive after being repaired according to claim 6, wherein the surface treatment in the step 3) is an activator treatment or a primer treatment.

9. The method for testing and evaluating the performance of the repaired structural adhesive according to any one of claims 6 to 8, wherein the repairing process of the step 4) is performed within thirty minutes after the surface treatment is performed on the cut surface of the structural adhesive sample block.

10. The structural adhesive repaired performance test evaluation method of claim 6, characterized in that the joint surface of the original adhesive block (6) and the repair adhesive block (7) is a repair interface (9), and in step 6), the strength of the repair joint (8) is not lower than that of the original joint (5), no matter where the damage interface is, the requirements are satisfied; the strength of the repaired joint (8) is lower than that of the original joint (5), and the repaired joint is damaged at the repaired interface (9) but meets the requirement; the strength of the repair joint (8) is lower than that of the original joint (5), and the repair joint is damaged at the repair rubber block (7) or the bonding interface of the repair rubber block (7) and the lining plate (2), but the service requirement is met.

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