A metal composite strain fatigue testing device

Abstract

The utility model relates to fatigue detection technical field, concretely relates to a kind of metal composite material strain fatigue testing device, including support, testing machine body, clamping device and adjusting device, the support is installed with testing machine body, the testing machine body is installed with clamping device, the clamping device can also drive the metal composite material to be tested torsion while clamping, and further test its fatigue strength;The adjusting device is installed in the clamping device side, the adjusting device is used to adjust the metal composite material to be tested by eccentric wheel rotation, and further realize the fatigue test of metal composite material.

Description

Technical Field

[0001] This utility model relates to the field of fatigue detection technology, specifically to a strain fatigue testing device for metal composite materials. Background Technology

[0002] Strain fatigue testing of metallic composite materials is a key method for evaluating the fatigue performance of materials under alternating strain. During testing, a standard specimen is clamped in a fatigue testing machine, and parameters such as strain amplitude, frequency, and waveform are set to subject the specimen to periodic cyclic strain. By real-time monitoring of the stress-strain response, crack initiation and propagation, and final fracture mode during cyclic loading, important data such as the material's fatigue life curve and hysteresis loop can be obtained. This information is crucial for predicting the service life of metallic composite materials under actual engineering conditions, optimizing structural design, and ensuring safety and reliability. This test is widely used in aerospace, automotive, and energy fields and is an indispensable part of materials research and engineering applications.

[0003] Existing fatigue testing devices have relatively limited functions, typically only capable of performing simple tensile and compressive fatigue tests. They cannot meet the needs for multi-dimensional fatigue performance evaluation of metal composite materials under complex working conditions, especially for fatigue strength testing under torsional conditions. This significantly restricts the understanding and research of the comprehensive fatigue performance of metal composite materials.

[0004] Therefore, the present invention provides a strain fatigue testing device for metal composite materials to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing fatigue testing devices have relatively simple functions and can usually only perform simple tensile and compressive fatigue tests. They cannot meet the needs of multi-dimensional fatigue performance evaluation of metal composite materials under complex working conditions. In particular, they are significantly insufficient for fatigue strength testing of materials under torsional conditions, which greatly limits the understanding and research of the comprehensive fatigue performance of metal composite materials.

[0006] This utility model provides the following technical solution: a strain fatigue testing device for metal composite materials, including a support, a testing machine body, a clamping device, and an adjusting device. The testing machine body is mounted on the support, and the clamping device is mounted on the testing machine body. The clamping device can also cause the metal composite material to be tested to twist while clamping, thereby further testing its fatigue strength. The adjusting device is installed on one side of the clamping device. The adjusting device is used to adjust the metal composite material to be tested by rotating an eccentric wheel, thereby realizing the fatigue testing of the metal composite material.

[0007] Preferably, the clamping device includes a clamping sleeve, a clamping groove, an adjusting plate, a fixing bolt, and a torsion mechanism. The clamping sleeve is installed on the output end of the testing machine body. The clamping sleeve has an array of clamping grooves. An adjusting plate is provided in the clamping groove. Fixing bolts for fixing the adjusting plate are symmetrically arranged on the clamping sleeve. A torsion mechanism is installed at one end of the clamping sleeve.

[0008] Preferably, the torsion mechanism includes a torsion bar, a first hinge sleeve, a fixed column, a hinge column, and a second hinge sleeve. The torsion bar is installed on one side of the clamping device, and the other end of the torsion bar is equipped with a first hinge sleeve. A fixed column is installed inside the first hinge sleeve, a hinge column is installed on the fixed column, and a second hinge sleeve is installed on the hinge column. The second hinge sleeve is installed on the output shaft of the testing machine body.

[0009] Preferably, the first hinge sleeve and the second hinge sleeve are U-shaped.

[0010] Preferably, the adjusting device includes an adjusting motor, a reducer, an adjusting disc, an adjusting connecting rod, a sliding block, a fixed rod, and an adjusting rod. The adjusting motor is fixed on a bracket, and the adjusting disc is installed through the reducer at the output end of the adjusting motor. The reducer is fixed on the bracket, and the adjusting connecting rod is eccentrically mounted on the adjusting disc. A sliding block is installed at one end of the adjusting connecting rod. A fixed rod is installed on the bracket, and the sliding block is slidably mounted on the fixed rod. One end of the adjusting rod is mounted on the sliding block, and the other end of the adjusting rod is mounted on the torsion rod.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. This utility model achieves stable clamping and precise fixation of metal composite materials through a clamping device. The cooperation of the clamping sleeve, clamping groove, adjusting plate, and fixing bolts can flexibly adapt to materials of different sizes, ensuring the firmness and reliability of the clamping. Simultaneously, the design of the torsion mechanism allows for the application of torsional stress to the material during fatigue testing, simulating stress conditions under complex working conditions, thereby providing a more comprehensive and accurate test of the material's fatigue strength. Furthermore, the adjusting device, through the coordinated action of the adjusting motor, reducer, adjusting disc, adjusting linkage, sliding block, fixing rod, and adjusting rod, achieves precise control over the up-and-down movement of the torsion rod, improving the accuracy and stability of the adjustment, reducing manual intervention, and enhancing testing efficiency and safety. Overall, this utility model not only improves the accuracy and reliability of strain fatigue testing of metal composite materials but also enhances the versatility and applicability of the device, providing strong support for the performance evaluation and application of metal composite materials. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0015] Figure 2 This is a schematic diagram of the torsion mechanism of this utility model;

[0016] Figure 3 This is a schematic diagram of the fixed column and the hinged column of this utility model;

[0017] Figure 4 This is a schematic diagram of the adjustment device of this utility model.

[0018] In the diagram: 1. Support; 2. Testing machine body; 3. Clamping device; 31. Clamping sleeve; 32. Clamping groove; 33. Adjusting plate; 34. Fixing bolt; 35. Torsion mechanism; 351. Torsion bar; 352. No. 1 hinge sleeve; 353. Fixing column; 354. Hinge column; 355. No. 2 hinge sleeve; 4. Adjusting device; 41. Adjusting motor; 42. Reducer; 43. Adjusting disc; 44. Adjusting connecting rod; 45. Sliding block; 46. Fixing rod; 47. Adjusting rod. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely represents some embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and "back side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is conventionally placed during use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0022] It should also be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 according to the specific circumstances.

[0023] This disclosure aims to address the limitations of existing fatigue testing devices, which typically only perform simple tensile and compressive fatigue tests. These devices fail to meet the multi-dimensional fatigue performance evaluation needs of metallic composite materials under complex working conditions, particularly regarding fatigue strength testing under torsional conditions. This significantly restricts the understanding and research of the comprehensive fatigue performance of metallic composite materials. Therefore, this disclosure proposes a strain fatigue testing device for metallic composite materials. A clamping device achieves stable clamping and precise fixation of the metallic composite material. The combination of the clamping sleeve, clamping groove, adjusting plate, and fixing bolts allows for flexible adaptation to materials of different sizes, ensuring the firmness and reliability of the clamping. Simultaneously, the design of the torsion mechanism applies torsional stress to the material during fatigue testing, simulating stress conditions under complex working conditions, thereby providing a more comprehensive and accurate test of the material's fatigue strength. Furthermore, the adjusting device, through the coordinated action of the adjusting motor, reducer, adjusting disc, adjusting linkage, sliding block, fixing rod, and adjusting rod, achieves precise control of the up-and-down movement of the torsion rod, improving the accuracy and stability of the adjustment, reducing manual intervention, and enhancing testing efficiency and safety. Overall, this invention not only improves the accuracy and reliability of strain fatigue testing of metal composite materials, but also enhances the versatility and applicability of the device, providing strong support for the performance evaluation and application of metal composite materials.

[0024] like Figures 1 to 4As shown, a strain fatigue testing device for metal composite materials includes a support 1, a testing machine body 2, a clamping device 3, and an adjusting device 4. The testing machine body 2 is mounted on the support 1, and the clamping device 3 is mounted on the testing machine body 2. The clamping device 3 can clamp the metal composite material to be tested while also causing it to twist, thereby further testing its fatigue strength. The adjusting device 4 is installed on one side of the clamping device 3. The adjusting device 4 is used to adjust the metal composite material to be tested by rotating an eccentric wheel, thereby realizing the fatigue testing of the metal composite material.

[0025] The clamping device 3 achieves stable clamping and precise fixation of the metal composite material. The combination of the clamping sleeve 31, clamping groove 32, adjusting plate 33, and fixing bolt 34 allows for flexible adaptation to materials of different sizes, ensuring the firmness and reliability of the clamping. Simultaneously, the design of the torsion mechanism 35 allows for the application of torsional stress to the material during fatigue testing, simulating stress conditions under complex working conditions, thus enabling a more comprehensive and accurate test of the material's fatigue strength. Furthermore, the adjusting device 4, through the coordinated action of the adjusting motor 41, reducer 42, adjusting disc 43, adjusting connecting rod 44, sliding block 45, fixing rod 46, and adjusting rod 47, achieves precise control over the up-and-down movement of the torsion rod 351, improving the accuracy and stability of the adjustment, reducing manual intervention, and enhancing testing efficiency and safety. Overall, this invention not only improves the accuracy and reliability of strain fatigue testing of metal composite materials but also enhances the versatility and applicability of the device, providing strong support for the performance evaluation and application of metal composite materials.

[0026] like Figures 1 to 3 As shown, the clamping device 3 includes a clamping sleeve 31, a clamping groove 32, an adjusting plate 33, fixing bolts 34, and a torsion mechanism 35. The clamping sleeve 31 is installed on the output end of the testing machine body 2 and is used to cooperate with the adjusting plate 33 to complete the fixation. The clamping sleeve 31 has an array of clamping grooves 32, which are used to fix the metal composite material and also to allow the adjusting plate 33 to move. The adjusting plate 33 is provided in the clamping groove 32 and is used to move to cooperate with the clamping groove 32 to clamp the metal composite material. The clamping sleeve 31 is symmetrically provided with fixing bolts 34 for fixing the adjusting plate 33. The fixing bolts 34 are used to fix the adjusting plate 33. The clamping sleeve 31 is equipped with a torsion mechanism 35 at one end and is used to torsion the metal composite material.

[0027] During operation, the staff places the metal composite material into the clamping groove 32 inside the clamping sleeve 31. At this time, the moving adjustment piece 33 clamps the metal composite material. After the metal composite material is clamped, the fixing bolt 34 is used to fix the adjustment piece 33. After the fixing is completed, the test machine body 2 is used to conduct the test, and the torsion mechanism 35 torsion it to further test its fatigue strength.

[0028] The above design not only achieves a stable clamping of the metal composite material, but also, through the movement of the adjusting plate 33 in conjunction with the clamping groove 32, flexibly adapts to materials of different sizes, ensuring the accuracy and firmness of the clamping. Simultaneously, the addition of the torsion mechanism 35 allows for the application of torsional stress to the metal composite material during fatigue testing, simulating complex stress conditions under actual working conditions. This enables a more comprehensive and accurate test of the material's fatigue strength, improving the reliability and validity of the test results and providing strong support for the performance evaluation and application of metal composite materials.

[0029] like Figures 1 to 3 As shown, the torsion mechanism 35 includes a torsion bar 351, a first hinge sleeve 352, a fixed column 353, a hinge column 354, and a second hinge sleeve 355. The torsion bar 351 is installed on one side of the clamping device 3 and is used to drive the clamping device 3 to rotate. The other end of the torsion bar 351 is equipped with a first hinge sleeve 352. The first hinge sleeve 352 is equipped with a fixed column 353. The fixed column 353 is equipped with a hinge column 354. The second hinge sleeve 355 is installed on the hinge column 354. The second hinge sleeve 355 is installed on the output shaft of the testing machine body 2.

[0030] Through the ingenious combination of torsion bar 351, first hinge sleeve 352, fixed column 353, hinge column 354, and second hinge sleeve 355, stable driving and precise torsion of clamping device 3 are achieved. This structure not only ensures the smoothness and stability of the torsion action but also allows for flexible adjustment of the torsion angle and force, thereby applying torsional stress to metal composite materials under different working conditions and more realistically simulating actual usage scenarios. Simultaneously, the hinge design of each component improves the adaptability and flexibility of the device, enabling it to be compatible with metal composite materials of different specifications, enhancing the versatility and applicability of the testing device. Furthermore, the torsion mechanism 35 closely cooperates with the output shaft of the testing machine body 2, ensuring efficient and accurate power transmission, further improving the reliability of fatigue testing and the validity of test results.

[0031] like Figure 3As shown, the first hinge sleeve 352 and the second hinge sleeve 355 are U-shaped. Designing the first hinge sleeve 352 and the second hinge sleeve 355 in a U-shape has significant advantages. The U-shaped structure provides a wider contact area and stronger connection stability, ensuring a reliable connection between the torsion bar 351 and the fixed column 353, and between the hinge column 354 and the output shaft of the testing machine body 2, thereby improving the stability and accuracy of the torsion process. Simultaneously, this shape design allows for a certain amount of axial movement, which helps to buffer and absorb minor impacts and vibrations during the torsion process, extending the service life of the components.

[0032] like Figures 1 to 4 As shown, the adjusting device 4 includes an adjusting motor 41, a reducer 42, an adjusting disc 43, an adjusting connecting rod 44, a sliding block 45, a fixed rod 46, and an adjusting rod 47. The adjusting motor 41 is fixed on the bracket 1. The output end of the adjusting motor 41 passes through the reducer 42 and is mounted on the adjusting disc 43. The reducer 42 is fixed on the bracket 1. The adjusting connecting rod 44 is eccentrically mounted on the adjusting disc 43. The sliding block 45 is mounted on one end of the adjusting connecting rod 44. The fixed rod 46 is mounted on the bracket 1. The sliding block 45 is slidably mounted on the fixed rod 46. One end of the adjusting rod 47 is mounted on the sliding block 45. The other end of the adjusting rod 47 is mounted on the torsion rod 351.

[0033] During operation, the regulating motor 41 starts and drives the regulating disc 43 to rotate. The rotation of the regulating disc 43 drives the regulating connecting rod 44 to rotate. The rotation of the regulating connecting rod 44 drives the sliding block 45 to move up and down on the fixed rod 46. The up and down movement of the sliding block 45 drives the regulating rod 47 to move up and down. Due to the design of the first hinge sleeve 352 and the second hinge sleeve 355, the up and down movement of the regulating rod 47 drives the torsion rod 351 to move up and down.

[0034] By coordinating the adjustment of motor 41, reducer 42, adjustment disc 43, adjustment link 44, sliding block 45, fixed rod 46, and adjustment rod 47, precise control of the up-and-down movement of torsion bar 351 is achieved. The adjustment motor 41 provides stable power output, which, after being reduced and amplified by reducer 42, drives the adjustment disc 43 to rotate eccentrically. This rotational motion is then converted into linear motion of the sliding block 45 along the fixed rod 46 via the transmission of adjustment link 44 and sliding block 45, ultimately driving the up-and-down movement of torsion bar 351. This design not only improves adjustment accuracy and stability but also enables automated adjustment, reduces manual intervention, and enhances testing efficiency and safety. Furthermore, due to the design of hinge sleeves 352 and 355, torsion bar 351 maintains good torsional performance during up-and-down movement, ensuring more uniform and accurate torsional stress applied to the metal composite material, thereby further improving the reliability and effectiveness of fatigue testing.

[0035] The overall working process is as follows: The operator places the metal composite material into the clamping groove 32 inside the clamping sleeve 31. At this time, the moving adjusting plate 33 clamps the metal composite material. After the metal composite material is clamped, the adjusting plate 33 is fixed with the fixing bolt 34. After the fixing is completed, the test machine body 2 is used for the test. At the same time, the torsion mechanism 35 torsion is applied to it to further test its fatigue strength. When adjustment is required, the adjusting motor 41 is started to drive the adjusting plate 43 to rotate. The rotation of the adjusting plate 43 drives the adjusting connecting rod 44 to rotate. The rotation of the adjusting connecting rod 44 drives the sliding block 45 to move up and down on the fixed rod 46. The up and down movement of the sliding block 45 drives the adjusting rod 47 to move up and down. Due to the design of the first hinge sleeve 352 and the second hinge sleeve 355, the up and down movement of the adjusting rod 47 drives the torsion rod 351 to move up and down.

[0036] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A strain fatigue testing device for metal composite materials, characterized in that, The test machine includes a support (1), a testing machine body (2), a clamping device (3), and an adjusting device (4). The testing machine body (2) is mounted on the support (1), and the clamping device (3) is mounted on the testing machine body (2). The clamping device (3) can also drive the metal composite material to be tested to twist while clamping, thereby further testing its fatigue strength. The adjusting device (4) is installed on one side of the clamping device (3). The adjusting device (4) is used to adjust the metal composite material to be tested by rotating the eccentric wheel, thereby realizing the fatigue test of the metal composite material.

2. The strain fatigue testing device for metal composite materials according to claim 1, characterized in that: The clamping device (3) includes a clamping sleeve (31), a clamping groove (32), an adjusting plate (33), a fixing bolt (34), and a torsion mechanism (35). The clamping sleeve (31) is installed on the output end of the test machine body (2). The clamping sleeve (31) has an array of clamping grooves (32) inside. The clamping grooves (32) are provided inside. The adjusting plate (33) is provided inside. The clamping sleeve (31) is symmetrically provided with fixing bolts (34) for fixing the adjusting plate (33). The clamping sleeve (31) has a torsion mechanism (35) installed at one end.

3. The strain fatigue testing device for metal composite materials according to claim 2, characterized in that: The torsion mechanism (35) includes a torsion bar (351), a first hinge sleeve (352), a fixed column (353), a hinge column (354), and a second hinge sleeve (355). The torsion bar (351) is installed on one side of the clamping device (3), and the other end of the torsion bar (351) is equipped with a first hinge sleeve (352). The first hinge sleeve (352) is equipped with a fixed column (353), the fixed column (353) is equipped with a hinge column (354), the hinge column (354) is equipped with a second hinge sleeve (355), and the second hinge sleeve (355) is installed on the output shaft of the testing machine body (2).

4. The strain fatigue testing device for metal composite materials according to claim 3, characterized in that: The first hinge sleeve (352) and the second hinge sleeve (355) are U-shaped.

5. The strain fatigue testing device for metal composite materials according to claim 4, characterized in that: The adjustment device (4) includes an adjustment motor (41), a reducer (42), an adjustment disc (43), an adjustment connecting rod (44), a sliding block (45), a fixed rod (46), and an adjustment rod (47). The adjustment motor (41) is fixed on the bracket (1). The output end of the adjustment motor (41) passes through the reducer (42) and is fitted with the adjustment disc (43). The reducer (42) is fixed on the bracket (1). The adjustment connecting rod (44) is eccentrically mounted on the adjustment disc (43). One end of the adjustment connecting rod (44) is fitted with the sliding block (45). The fixed rod (46) is mounted on the bracket (1). The sliding block (45) is slidably mounted on the fixed rod (46). One end of the adjustment rod (47) is mounted on the sliding block (45). The other end of the adjustment rod (47) is mounted on the torsion rod (351).

Images