Parallel testing fixture and fatigue testing device based on sealant fatigue testing

Abstract

This utility model discloses a parallel testing fixture and fatigue testing device based on sealant fatigue testing, relating to the field of fatigue testing technology. The fixed base has a first piston chamber, a hydraulic chamber, and multiple second piston chambers connected to each other. The hydraulic chambers can be filled with hydraulic oil. The first piston assembly can move within the first piston chamber, and the surface of the first piston assembly in contact with the hydraulic oil is a first compression surface. Multiple second piston assemblies, multiple second piston chambers, and multiple clamping assemblies are in one-to-one correspondence. The second piston assemblies can move within the second piston chambers, and the surface of the second piston assembly in contact with the hydraulic oil is a second compression surface. All second compression surfaces have the same area, and the sum of their areas equals the area of ​​the first compression surface. The two ends of the clamping assemblies are respectively connected to the fixed base and the ends of the second piston assemblies located outside the second piston chambers, allowing the clamping assemblies to stretch or compress the sample. Multiple samples are tested in parallel using a hydraulic method, ensuring that the load on the samples is the same and the test is accurate.

Description

Technical Field

[0001] This utility model relates to the field of fatigue testing technology, and in particular to a parallel testing fixture and fatigue testing device based on sealant fatigue testing. Background Technology

[0002] Fatigue testing of building sealants is one of the important tests for ultra-high performance sealants, especially structural sealants used in super high-rise buildings. Due to various influences on the upper part of the building (such as wind force, gravity, thermal expansion and contraction, etc.), the sealants in super high-rise buildings are always in a state of tension-compression cycle at a certain frequency. Therefore, fatigue testing of the sealant itself is very important for studying the application of high-performance sealants in super high-rise buildings.

[0003] Existing fatigue testing methods are all designed for testing single samples. However, actual testing standards generally require parallel testing of multiple I-shaped samples, such as testing five samples simultaneously. However, current testing methods face several challenges: the corresponding testing equipment, such as fatigue cyclic testing machines, is expensive, typically costing over 500,000 yuan, and each test can only test one sample at a time. Furthermore, the testing cycle is long. For example, with a cycle of 10 seconds, testing one million times would take approximately 116 days. If testing a group of five samples is required, the time would be 580 days. This extended testing timeframe is extremely detrimental to product research and improvement, thus necessitating improvement.

[0004] Currently, there are two main improvement methods: The first is the series test method, which connects the same set of samples end to end and places them on a fatigue cycle testing machine for testing. In this case, it can be ensured that the tensile force on each sample is the same and that the tensile load of each sample is stable. However, during the compression process, due to the elasticity of the sealant and the slight deviation in the size of the samples, the series setting of 5 samples will increase the total length of the samples connected end to end. Therefore, the samples are very prone to bending and deformation during this process, which will lead to inaccurate test results.

[0005] The second method is the parallel testing method, in which five samples are connected horizontally in parallel and the load is set to five times the original test conditions to conduct fatigue cycles. This can ensure the fatigue cycle to a certain extent and the samples will not easily bend or deform during compression. However, since it is a parallel test and the load is increased to five times the original, due to the placement of the samples (the distance between the sample and the tensile center axis) and the size deviation of the samples themselves, it cannot be guaranteed that each sample can be evenly distributed with 1 / 5 of the load. Therefore, the sample in the middle will experience the largest tensile and compressive load, while the sample at the edge will experience a smaller tensile and compressive load, resulting in a decrease in the accuracy of the test results. Utility Model Content

[0006] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a parallel testing fixture and fatigue testing device based on sealant fatigue testing, which can perform parallel testing on multiple sealant samples via hydraulic means, improving testing efficiency and ensuring the uniformity of the load on each sealant sample during the testing process and good testing accuracy.

[0007] The first aspect of this utility model provides a parallel test fixture based on sealant fatigue testing, which includes: A fixed base is provided with a first piston chamber, a hydraulic chamber and a second piston chamber that are connected to each other. The hydraulic chamber is configured to be filled with hydraulic oil and the second piston chamber is provided with multiple chambers. The first piston assembly has two ends respectively located inside and outside the first piston chamber. The first piston assembly is configured to move within the first piston chamber. The surface of the first piston assembly that contacts the hydraulic oil is the first compression surface. The second piston assembly has multiple components, each corresponding to one of the multiple second piston chambers. The two ends of the second piston assembly are respectively located inside and outside the second piston chamber. The second piston assembly is configured to move within the second piston chamber. The surface of the second piston assembly that contacts the hydraulic oil is the second compression surface. All the second compression surfaces have the same area, and the sum of the areas of all the second compression surfaces is equal to the area of ​​the first compression surface. The clamping assembly is provided in multiple parts, each corresponding to one of the multiple second piston assemblies. The clamping assembly is configured to clamp the sample. Both ends of the clamping assembly are connected to the fixed seat and the end of the second piston assembly located outside the second piston cavity, respectively, so that the clamping assembly can stretch or compress the sample.

[0008] According to the first aspect of the present invention, the parallel test fixture based on sealant fatigue testing has at least the following beneficial effects: a first piston assembly is disposed at a first piston chamber on a fixed base, and multiple second piston assemblies are respectively disposed at multiple second piston chambers on the fixed base, with hydraulic oil filling the hydraulic chamber. Simultaneously, multiple clamping assemblies holding sealant samples are respectively disposed corresponding to the multiple second piston assemblies, and the clamping assemblies are respectively fixedly connected to the fixed base and the second piston assemblies. When the first piston assembly applies force to the hydraulic oil in the hydraulic chamber under external force, the second piston assembly can drive the clamping assemblies to move, causing the clamping assemblies to apply tension or compression to the clamped samples. This achieves simultaneous completion of fatigue testing of multiple sealants through hydraulic drive and parallel testing, improving testing efficiency.

[0009] Furthermore, since the second compression surface of each second piston assembly has the same area, and the sum of the areas of the second compression surfaces of all the second piston assemblies is equal to the area of ​​the first compression surface of the first piston assembly, the characteristics of hydraulic principle can be used to evenly distribute a specific load to each second piston assembly. This ensures good uniformity of force on the sample on each clamping assembly during the parallel fatigue test, guaranteeing accurate test results. This effectively solves the problem of bending deformation of the sample during compression in the vertical series fatigue test, as well as the problem of uneven force on the sample during the transverse parallel fatigue test.

[0010] In some embodiments of this utility model, the first piston chamber, the hydraulic chamber, and the second piston chamber are arranged sequentially from top to bottom.

[0011] In some embodiments of this utility model, the moving direction of the first piston assembly and the moving direction of the second piston assembly are both up and down, and the clamping assembly is located below the second piston assembly.

[0012] In some embodiments of this invention, all the second piston assemblies are arranged at uniform intervals along a first direction, which is perpendicular to the up-down direction.

[0013] In some embodiments of this invention, all the second piston assemblies are arranged symmetrically about the central axis of the first piston assembly.

[0014] In some embodiments of this invention, all the second piston assemblies are arranged in a circular pattern around the central axis of the first piston assembly.

[0015] In some embodiments of this utility model, both the first compression surface and the second compression surface are circular or square surfaces. The first piston assembly includes a first piston block and a first piston rod. The first piston block is disposed within the first piston cavity and connected to one end of the first piston rod, while the other end of the first piston rod is disposed outside the first piston cavity. The second piston assembly includes a second piston block and a second piston rod. The second piston block is disposed within the second piston cavity and connected to one end of the second piston rod, while the other end of the second piston rod is disposed outside the second piston cavity. And / or, The second piston chamber has five chambers, the second piston assembly has five assemblies, and the clamping assembly has five assemblies.

[0016] In some embodiments of this utility model, one end of the clamping assembly is detachably connected to the fixed base, and the other end of the clamping assembly is detachably connected to the second piston assembly. Both the second piston assembly and the clamping assembly have a central axis that coincides with the central axis of the sample.

[0017] In some embodiments of this utility model, the clamping assembly includes a first clamping member and a second clamping member. The first clamping member and the second clamping member are arranged opposite to each other and separately, and are configured to jointly clamp an I-shaped sample. The end of the first clamping member away from the sample is connected to the second piston assembly, and the end of the second clamping member away from the sample is connected to the fixed base.

[0018] A second aspect of this utility model provides a fatigue testing device, comprising: Parallel test fixture based on sealant fatigue test as described in any of the embodiments of the first aspect; A driving device, the output end of which is connected to one end of the first piston assembly located outside the first piston chamber, to drive the first piston assembly to move within the first piston chamber.

[0019] The fatigue testing apparatus according to the second aspect of this utility model has at least the following beneficial effects: when multiple sealant samples are respectively installed at multiple clamping components on a parallel test fixture, an external force is applied to the first piston assembly by a driving device, causing the first piston assembly to move in the first piston chamber and applying force to the hydraulic oil in the hydraulic chamber, so that multiple second piston assemblies can move in their respective second piston chambers and drive the corresponding clamping components to move, thereby enabling the clamping components to stretch or compress the corresponding samples. Thus, multiple sealant samples can be simultaneously subjected to fatigue testing through hydraulic drive and parallel testing, thereby improving testing efficiency.

[0020] Since the areas of the second compression surfaces of all the second piston assemblies are equal, and the sum of their areas is equal to the area of ​​the first compression surface of the first piston assembly, the pressure of a single clamping assembly can be evenly distributed according to the characteristics of the hydraulic system. This not only enables simultaneous testing of multiple samples, but also ensures that each sample in parallel testing is subjected to the same load, thereby ensuring high test accuracy.

[0021] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a parallel test fixture based on sealant fatigue testing according to an embodiment of the present invention.

[0023] Reference numerals: 100, fixed base; 110, hydraulic chamber; 120, first piston chamber; 130, second piston chamber; 140, support part; 200, clamping assembly; 210, first clamping member; 220, second clamping member; 300, sample; 410, first piston assembly; 420, second piston assembly; 500, hydraulic oil. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that features specified as "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The following is for reference. Figure 1 This invention describes a parallel testing fixture and fatigue testing device based on sealant fatigue testing, according to an embodiment of the present invention.

[0028] like Figure 1 As shown, the parallel test fixture based on sealant fatigue testing according to the first aspect of this utility model can be applied to the fatigue testing of sealants.

[0029] The parallel test fixture based on sealant fatigue testing in this embodiment can perform parallel testing on multiple sealant samples 300 through hydraulic means, improving testing efficiency. Moreover, it can also ensure the uniformity of the load on each sealant sample 300 during the test and good testing accuracy.

[0030] The parallel test fixture based on sealant fatigue testing has a first direction and a vertical direction, wherein the first direction is perpendicular to the vertical direction. In this embodiment, the first direction is assumed to be the horizontal direction.

[0031] like Figure 1 As shown, the parallel test fixture based on sealant fatigue testing includes a fixed base 100, a first piston assembly 410, a second piston assembly 420, and a clamping assembly 200.

[0032] The fixed base 100 has a hollow interior forming a first piston chamber 120, a hydraulic chamber 110, and a second piston chamber 130, which are interconnected. There is one first piston chamber 120, configured to allow the first piston assembly 410 to perform piston movement. There is one hydraulic chamber 110, configured to be filled with hydraulic oil 500, with some of the hydraulic oil 500 flowing into the first piston chamber 120 and the second piston chamber 130. There are multiple second piston chambers 130, configured to allow the second piston assembly 420 to perform piston movement.

[0033] In this embodiment, the first piston chamber 120, the hydraulic chamber 110, and the second piston chamber 130 are arranged sequentially from top to bottom, with the hydraulic chamber 110 located below the first piston chamber 120 and above the second piston chamber 130.

[0034] A first piston assembly 410 is provided and is correspondingly arranged with respect to the first piston chamber 120. The two ends of the first piston assembly 410 are respectively located inside and outside the first piston chamber 120. The first piston assembly 410 is configured to move within the first piston chamber 120 to apply force to the hydraulic oil 500 located within the first piston chamber 120. It is understood that the outer end of the first piston assembly 410 is a drive connection end and is configured to connect to a drive device such as a tensile testing machine, allowing the drive device to apply force to the first piston assembly 410, causing the inner end of the first piston assembly 410 to perform piston movement within the first piston chamber 120, thus causing a portion of the hydraulic oil 500 to flow into or out of the first piston chamber 120. The surface of the first piston assembly 410 that contacts the hydraulic oil 500 is a first compression surface.

[0035] Specifically, the first piston assembly 410 includes a first piston block and a first piston rod. The first piston block is disposed within the first piston chamber 120, and is fixedly connected to one end of the first piston rod. The other end of the first piston rod is located outside the first piston chamber 120, and the first piston chamber 120 has a first opening for the first piston rod to extend outward. The first piston block is capable of linear movement along the axial direction of the first piston rod, and the surface of the first piston block away from the first piston rod is a first compression surface. The first piston block can be made of materials such as aluminum alloy or steel.

[0036] Multiple second piston assemblies 420 are provided, and each of the multiple second piston assemblies 420 is respectively arranged in a one-to-one correspondence with a multiple second piston chambers 130. The two ends of each second piston assembly 420 are respectively located inside and outside the second piston chamber 130. Each second piston assembly 420 is configured to move within the second piston chamber 130 to apply force to the hydraulic oil 500 located within the second piston chamber 130. It is understood that the outer end of the second piston assembly 420 is configured to connect with the clamping assembly 200, and the inner end of the second piston assembly 420 is configured to perform piston movement within the second piston chamber 130, causing a portion of the hydraulic oil 500 to flow into or out of the second piston chamber 130.

[0037] The surface of the second piston assembly 420 that contacts the hydraulic oil 500 is the second compression surface. Moreover, all second piston assemblies 420 have second compression surfaces of the same area, and the sum of the areas of all second compression surfaces is equal to the area of ​​the first compression surface.

[0038] Specifically, the second piston assembly 420 includes a second piston block and a second piston rod. The second piston block is disposed within the second piston cavity 130, and is fixedly connected to one end of the second piston rod. The other end of the second piston rod is located outside the second piston cavity 130, which has a second opening for the second piston rod to extend outward. The second piston block is capable of linear movement along the axial direction of the second piston rod, and the surface of the second piston block away from the second piston rod is a second compression surface. The second piston block can be made of materials such as aluminum alloy or steel.

[0039] In some embodiments, the first compression surface and the second compression surface are circular surfaces. Of course, it is not excluded that in other embodiments, the first compression surface and the second compression surface are square surfaces.

[0040] In this embodiment, the moving direction of the first piston assembly 410 and the moving direction of the second piston assembly 420 are both vertical. The clamping assembly 200 is located below the second piston assembly 420. Furthermore, the fixing base 100 is provided with a placement space for accommodating the clamping assembly 200, and the placement space extends at least forward or backward. When the first piston assembly 410 moves downward, it drives a portion of the hydraulic oil 500 to flow out of the first piston chamber 120, while simultaneously, a portion of the hydraulic oil 500 flows into the second piston chamber 130, causing the second piston assembly 420 to move downward accordingly. When the first piston assembly 410 moves upward, it drives a portion of the hydraulic oil 500 to flow into the first piston chamber 120, while simultaneously, a portion of the hydraulic oil 500 flows out of the second piston chamber 130, causing the second piston assembly 420 to move upward accordingly.

[0041] Of course, it is not excluded that in other embodiments, the first piston assembly 410 and the second piston assembly 420 may move in other directions, such as the horizontal direction.

[0042] Furthermore, all the second piston assemblies 420 are arranged at uniform intervals along the first direction, and all the second piston assemblies 420 are located above the clamping assembly 200 and below the hydraulic chamber 110. Moreover, all the second piston assemblies 420 are symmetrically arranged about the central axis of the first piston assembly 410.

[0043] Of course, it is not excluded that in other embodiments, all the second piston assemblies 420 are arranged in a circle around the central axis of the first piston assembly 410, and all the second piston assemblies 420 are located below the hydraulic chamber 110 and above the clamping assembly 200.

[0044] In this embodiment, there are five second piston chambers 130, five second piston assemblies 420, and five clamping assemblies 200. The five second piston chambers 130 are evenly arranged at a certain interval along the first direction, and the five second piston assemblies 420 are also evenly arranged along the first direction. The five clamping assemblies 200 are also arranged at equal intervals along the first direction. The second piston chambers 130 are located above the clamping assemblies 200. Both the second piston assemblies 420 and the first piston assemblies 410 are capable of piston movement in the vertical direction.

[0045] Multiple clamping assemblies 200 are provided, and each clamping assembly 200 is respectively arranged in a one-to-one correspondence with a plurality of second piston assemblies 420. The clamping assemblies 200 are configured to clamp the sample 300, and both ends of the clamping assemblies 200 are fixedly connected to the fixing base 100 and the end of the second piston assembly 420 located outside the second piston cavity 130, so that the clamping assemblies 200 can stretch or compress the sample 300.

[0046] Specifically, the clamping assembly 200 includes a first clamping member 210 and a second clamping member 220. The first clamping member 210 and the second clamping member 220 are arranged opposite to each other and are separated. The first clamping member 210 and the second clamping member 220 are configured to jointly clamp the I-shaped sample 300. The end of the first clamping member 210 away from the sample 300 is fixedly connected to the second piston assembly 420, and the end of the second clamping member 220 away from the sample 300 is fixedly connected to the fixing base 100.

[0047] In this embodiment, the structures of the first clamping member 210 and the second clamping member 220 are identical. Both clamping members use two screw-connected plates to clamp and fix the sample 300. Specifically, the I-shaped sample 300 has four clamped ends, each of which is fixed by two clamping plates. The fixing base 100 is provided with a support portion 140, which is integrally formed with the fixing base 100. The support portion 140 is located below the clamping assembly 200 and provides support for the clamping assembly 200. Multiple support portions 140 are provided, each corresponding to one of the multiple clamping assemblies 200.

[0048] In some embodiments, one end of the clamping assembly 200 is detachably connected to the fixing base 100, and the other end of the clamping assembly 200 is detachably connected to the second piston assembly 420. The detachable connection method can be, but is not limited to, a screw connection. Furthermore, both the second piston assembly 420 and the clamping assembly 200 have a central axis that coincides with the central axis of the sample 300. In this embodiment, the I-shaped sample 300 has a central axis extending in the vertical direction, as do the second piston assembly 420 and the clamping assembly 200. This design ensures that the sample 300 on the clamping assembly 200 undergoes axial tensile or compressive deformation, avoiding bending deformation and improving test accuracy.

[0049] Before commencing fatigue testing, the sealant is prepared into an I-shaped sample 300, which is then subjected to aging tests. After aging, multiple samples 300 are sequentially placed into a parallel test fixture based on sealant fatigue testing and clamped and fixed by the clamping assembly 200.

[0050] In the use of the parallel test fixture based on sealant fatigue testing provided in the first aspect embodiment of this utility model, since the first piston assembly 410 is disposed at the first piston chamber 120 on the fixed base 100, and multiple second piston assemblies 420 are respectively disposed at multiple second piston chambers 130 on the fixed base 100, and hydraulic oil 500 is filled in the hydraulic chamber 110, and the clamping assemblies 200 of multiple fixed clamps holding sealant samples 300 are respectively disposed corresponding to the multiple second piston assemblies 420, and the clamping assemblies 200 are respectively fixedly connected to the fixed base 100 and the second piston assembly 420, when the first piston assembly 410 is subjected to external force and applies force to the hydraulic oil 500 in the hydraulic chamber 110, the second piston assembly 420 can drive the clamping assembly 200 to move, causing the clamping assembly 200 to apply a stretching or compressing effect to the sample 300 it clamps, thereby realizing the simultaneous completion of fatigue testing of multiple sealants through hydraulic drive and parallel testing method, improving testing efficiency.

[0051] Furthermore, since the second compression surface of each second piston assembly 420 has the same area, and the sum of the areas of the second compression surfaces of all second piston assemblies 420 is equal to the area of ​​the first compression surface of the first piston assembly 410, the characteristics of hydraulic principle can be used to evenly distribute a specific load to each second piston assembly 420. This ensures good uniformity of stress on the sample 300 on each clamping assembly 200 during the parallel fatigue test, guaranteeing accurate test results. This effectively solves the problem of bending deformation of the sample 300 during compression in the vertical series fatigue test, as well as the problem of uneven stress on the sample 300 during the transverse parallel fatigue test. Ultimately, this provides better methods and tools for accelerating the research and development and testing of ultra-high performance sealants.

[0052] like Figure 1 As shown, the fatigue testing device according to the second aspect of this utility model can be applied to the fatigue testing of sealants.

[0053] The fatigue testing apparatus includes a drive unit and a parallel test fixture for sealant fatigue testing as described in the first aspect embodiment. The output end of the drive unit is fixedly connected to one end of the first piston assembly 410 located outside the first piston chamber 120. The fixing seat 100 can be fixed to a work platform or a support frame. During operation, the drive unit can drive the first piston assembly 410 to move within the first piston chamber 120.

[0054] Understandably, the driving device can be a tensile testing machine. The fixed base 100, the first piston assembly 410, the second piston assembly 420, and the hydraulic oil 500 can form a hydraulic system. When the first piston assembly 410 moves due to the driving action, the second piston assembly 420 will also move accordingly, thereby allowing the second piston assembly 420 to apply an external force to the clamping assembly 200, enabling the clamping assembly 200 to stretch or compress the sample 300 on it.

[0055] In this embodiment, the driving device is a tensile testing machine. The number of the first piston chamber 120 and the first piston assembly 410 is one, and the number of the second piston chamber 130, the second piston assembly 420 and the clamping assembly 200 is five. The second compression surface of the five second piston assemblies 420 has the same area, and the area of ​​the second compression surface of each second piston assembly 420 is one-fifth of the area of ​​the first compression surface of the first piston assembly 410.

[0056] Throughout the tensile / compression process, the load on each clamping assembly 200 is one-fifth of the total load applied by the tensile testing machine, and the timing is equal. Therefore, by simply setting the overall test load to five times that of a single specimen 300, the uniformity of the load on each specimen 300 during the test and the accuracy of the test can be guaranteed, thereby greatly improving the test precision and shortening the test time.

[0057] In the use of the fatigue testing device provided in the second aspect embodiment of this utility model, when multiple sealant samples 300 are respectively installed at multiple clamping components 200 on the parallel test fixture, the driving device applies external force to the first piston assembly 410, causing the first piston assembly 410 to move in the first piston chamber 120 and apply force to the hydraulic oil 500 in the hydraulic chamber 110, so that multiple second piston assemblies 420 can move in the corresponding second piston chamber 130, and drive the corresponding clamping components 200 to move, thereby enabling the clamping components 200 to stretch or compress the corresponding samples 300. Thus, fatigue tests can be performed on multiple sealant samples 300 simultaneously through hydraulic drive and parallel testing, and the testing efficiency is improved.

[0058] Since the hydraulic system can distribute the load according to the different proportions of the liquid level area, by setting the area of ​​the second compression surface of all the second piston assemblies 420 to be equal, and setting the sum of their areas to be equal to the area of ​​the first compression surface of the first piston assembly 410, the pressure of the individual clamping assembly 200 can be evenly distributed according to the characteristics of the hydraulic system. This not only enables the simultaneous testing of multiple samples 300, but also ensures that each sample 300 in the parallel testing operation receives the same load, thereby ensuring high test accuracy.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A parallel test fixture based on sealant fatigue test, characterized by, include: A fixed base is provided with a first piston chamber, a hydraulic chamber and a second piston chamber that are connected to each other. The hydraulic chamber is configured to be filled with hydraulic oil and the second piston chamber is provided with multiple chambers. The first piston assembly has two ends respectively located inside and outside the first piston chamber. The first piston assembly is configured to move within the first piston chamber. The surface of the first piston assembly that contacts the hydraulic oil is the first compression surface. The second piston assembly has multiple components, each corresponding to one of the multiple second piston chambers. The two ends of the second piston assembly are respectively located inside and outside the second piston chamber. The second piston assembly is configured to move within the second piston chamber. The surface of the second piston assembly that contacts the hydraulic oil is the second compression surface. All the second compression surfaces have the same area, and the sum of the areas of all the second compression surfaces is equal to the area of ​​the first compression surface. The clamping assembly is provided in multiple parts, each corresponding to one of the multiple second piston assemblies. The clamping assembly is configured to clamp the sample. Both ends of the clamping assembly are connected to the fixed seat and the end of the second piston assembly located outside the second piston cavity, respectively, so that the clamping assembly can stretch or compress the sample.

2. The parallel test fixture based on sealant fatigue test of claim 1, wherein, The first piston chamber, the hydraulic chamber, and the second piston chamber are arranged sequentially from top to bottom.

3. The parallel test fixture based on sealant fatigue test of claim 2, wherein, The first piston assembly moves in a vertical direction, as does the second piston assembly, and the clamping assembly is located below the second piston assembly.

4. The parallel test fixture based on sealant fatigue test of claim 3, wherein, All the second piston assemblies are arranged at uniform intervals along a first direction, which is perpendicular to the vertical direction.

5. The parallel test fixture based on sealant fatigue test of claim 4, wherein, All the second piston assemblies are arranged symmetrically about the central axis of the first piston assembly.

6. The parallel test fixture based on sealant fatigue test of claim 3, wherein, All the second piston assemblies are arranged in a circle around the central axis of the first piston assembly.

7. The parallel test fixture based on sealant fatigue test according to any one of claims 1 to 6, characterized in that, Both the first compression surface and the second compression surface are circular or square surfaces. The first piston assembly includes a first piston block and a first piston rod. The first piston block is disposed within the first piston cavity and connected to one end of the first piston rod, while the other end of the first piston rod is disposed outside the first piston cavity. The second piston assembly includes a second piston block and a second piston rod. The second piston block is disposed within the second piston cavity and connected to one end of the second piston rod, while the other end of the second piston rod is disposed outside the second piston cavity. And / or, The second piston chamber has five chambers, the second piston assembly has five assemblies, and the clamping assembly has five assemblies.

8. The parallel test fixture based on sealant fatigue test according to any one of claims 1 to 6, characterized in that, One end of the clamping assembly is detachably connected to the fixed base, and the other end of the clamping assembly is detachably connected to the second piston assembly. Both the second piston assembly and the clamping assembly have a central axis that coincides with the central axis of the sample.

9. The parallel test fixture based on sealant fatigue test of claim 8, wherein, The clamping assembly includes a first clamping member and a second clamping member, which are arranged opposite to each other and separately, and are configured to jointly clamp an I-shaped sample. The end of the first clamping member away from the sample is connected to the second piston assembly, and the end of the second clamping member away from the sample is connected to the fixed base.

10. A fatigue testing apparatus characterized by comprising: include: Parallel test fixture based on sealant fatigue test as described in any one of claims 1 to 9; A driving device, the output end of which is connected to one end of the first piston assembly located outside the first piston chamber, to drive the first piston assembly to move within the first piston chamber.

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