A multifunctional t-shaped test member

Abstract

The utility model belongs to test component technical field especially relates to a kind of multifunctional T type test component.The multifunctional T type test component, T shape, including head and the straight arm being connected with head, be equipped with multiple recesses on the head, the bottom of the recess is obliquely arranged, the depth of multiple recesses is sequentially arranged in continuous gradient, the section of straight arm is several Chinese characters shape.The utility model can study the LME crack depth at different deformation amount under the same temperature, or study the LME crack depth at the same deformation amount under different temperature by designing recess of different deformation amount (corresponding to different depth) on T type component, to realize the systematic research to LME crack depth, and straight arm part is designed for crashworthiness test, after thermoforming, after spot welding of several Chinese characters straight arm and flat plate, test three-point bending performance, for evaluating the crashworthiness of parts.

Description

Technical Field

[0001] This utility model belongs to the field of testing component technology, and in particular relates to a multifunctional T-shaped testing component. Background Technology

[0002] Domestically produced galvanized steel sheets have a significant cost advantage over aluminum-silicon coated materials, saving approximately 1,000 yuan per ton. Furthermore, galvanized steel sheets offer superior corrosion resistance, effectively extending their service life. However, during the thermoforming process, when the liquid zinc in the galvanized layer comes into contact with the substrate and is subjected to tensile stress, the liquid zinc can penetrate along the grain boundaries, leading to reduced plasticity and brittle fracture. This phenomenon is known as liquid metal embrittlement (LME).

[0003] The formation of liquid zinc membrane (LME) is closely related to the mold closing temperature and the degree of strain. If the mold closing temperature is too high, the penetration ability of liquid zinc will be significantly enhanced, leading to a substantial increase in crack depth. Furthermore, a higher strain rate also increases crack formation. Therefore, during thermoforming, it is necessary to strictly control the mold closing temperature and strain rate to effectively suppress the occurrence of LME.

[0004] Currently, the direct hot forming process for galvanized steel sheets has not yet been mass-produced, and there is a lack of research on the forming temperature and deformation window. At present, different deformation and temperature conditions need to be set for different parts, which not only increases the complexity and cost of the experiments but may also lead to errors introduced by differences in parts, affecting the accuracy and reliability of the research results. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a multifunctional T-shaped test component.

[0006] To achieve the above objectives, the technical solution adopted is: A multifunctional T-shaped test component, in the shape of a T, includes a head and a straight arm connected to the head. The head is provided with multiple grooves, each groove having an inclined bottom. The depths of the multiple grooves are different and are sequentially and continuously gradient-set. The cross-section of the straight arm is Z-shaped.

[0007] The beneficial effects of adopting the above technical solution are as follows: the T-shaped structure design provides good stability and ease of operation, making it effective in various testing environments; the head groove is used to provide a window for studying molding temperature and deformation; the continuous gradient setting of the groove depth can provide a display window for LME of any value (corresponding to different deformation amounts) within the depth range; and the straight arm Z-shaped structure is used to test three-point bend collision performance.

[0008] Based on the above technical solution, the present invention can be further improved as follows: Furthermore, the bottom slope of the plurality of grooves is the same.

[0009] The beneficial effect of adopting the above-mentioned further technical solutions is that it avoids the impact of different slopes on the LME crack situation.

[0010] Furthermore, the plurality of grooves are spaced apart.

[0011] The beneficial effect of adopting the above-mentioned further technical solutions is that the groove spacing setting can avoid mutual interference, making the test results of each groove more independent and reliable.

[0012] Furthermore, the groove is elongated and extends from the head towards the straight arm.

[0013] The beneficial effect of adopting the above-mentioned further technical solutions is that it makes full use of the head space.

[0014] Furthermore, the groove is configured as three grooves, namely a first groove, a second groove, and a third groove.

[0015] Furthermore, the thinning amounts of the three grooves are 0%-10%, 10%-20%, and 20%-30% of the thickness of the T-shaped test component, respectively. That is, the thinning amount at one end of the first groove is 0% of the thickness of the T-shaped test component, and the thinning amount (depth) at the other end is 10% of the thickness of the T-shaped test component, with the thinning amount (depth) continuously increasing from one end to the other; the thinning amount (depth) at one end of the second groove is 10% of the thickness of the T-shaped test component, and the thinning amount (depth) at the other end is 20% of the thickness of the T-shaped test component, with the thinning amount (depth) continuously increasing from one end to the other; the thinning amount (depth) at one end of the third groove is 20% of the thickness of the T-shaped test component, and the thinning amount (depth) at the other end is 30% of the thickness of the T-shaped test component, with the thinning amount (depth) continuously increasing from one end to the other.

[0016] The beneficial effects of adopting the above two-step further technical solution are as follows: This depth range setting can cover different degrees of damage that components may experience in actual use, from minor to moderate damage. It can comprehensively assess the performance changes of components under different damage states, providing a more accurate basis for component safety assessment and maintenance. A depth span of 10% at both ends of the groove is more suitable. If the span is too small, the window will be too narrow due to limited space; if the span is too large, it may damage the component.

[0017] Furthermore, the material of the multifunctional T-shaped test component is hot-formed galvanized steel sheet.

[0018] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: using hot-formed galvanized sheet as the material of the components enhances their corrosion resistance and durability, making them suitable for use in various environments and extending their service life.

[0019] Furthermore, the head and straight arm are an integrated structure.

[0020] Furthermore, the angle α1 between the line connecting the top and bottom of the groove and the horizontal plane is 60°-84°.

[0021] A method for testing the effect of deformation on LME includes the following steps: after thermoforming, sampling and testing are performed at different deformation positions of the grooves of the composite test component to study the effect of deformation on LME. Specifically, sampling and testing are performed at different deformation positions of the first groove, second groove, and third groove of the composite test component to study the effect of deformation on LME.

[0022] A test method for the effect of molding temperature on LME includes the following steps: adjusting the molding temperature of the composite test component during thermoforming, taking the same deformation point for testing, and studying the effect of molding temperature on LME.

[0023] A method for testing collision performance involves thermoforming a composite test component, cutting off the head and straight arm sections, spot welding the Z-shaped straight arm to a flat plate at the lower opening, and then testing the three-point bending performance to evaluate the collision performance of the part.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model proposes a galvanized sheet thermoformed T-shaped component with multi-directional testing function, which can simultaneously study the forming temperature and deformation window. By designing grooves with different deformation amounts (corresponding to different depths) on the T-shaped component, the LME crack depth at different deformation amounts can be studied at the same temperature, or the LME crack depth at the same deformation amount can be studied at different temperatures, thereby realizing a systematic study of LME crack depth. A straight arm part is designed for impact performance testing. After thermoforming, the Z-shaped straight arm is spot-welded to the flat plate, and the three-point bending performance is tested to evaluate the impact performance of the part. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a multifunctional T-shaped test component according to the present invention; Figure 2 This is a top view of a multifunctional T-shaped test component according to the present invention; Figure 3 for Figure 2 Sectional view along AA; Figure 4 for Figure 3 Enlarged view of point B; Figure 5 for Figure 2 Sectional view along CC; The attached figures are labeled as follows: 1. Head; 2. Straight arm; 3. Groove; 301. First groove; 302. Second groove; 303. Third groove. Detailed Implementation

[0026] The present invention will be described below with reference to examples. The examples are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0027] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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.

[0028] In the description of this utility model, it should also be noted that, 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.

[0029] Reference Figures 1-2 A multifunctional T-shaped test component, which is T-shaped, includes a head 1 and a straight arm 2 connected to the head 1. The head 1 is provided with a plurality of grooves 3, the bottom of the grooves 3 is inclined, and the depth of the plurality of grooves 3 is sequentially and continuously gradient. The cross-section of the straight arm 2 is Z-shaped.

[0030] In an optional embodiment, the bottom slopes of the plurality of grooves 3 are identical.

[0031] In an optional embodiment, the plurality of grooves 3 are spaced apart.

[0032] In a preferred embodiment, the groove 3 is elongated and extends from the head 1 toward the straight arm 2.

[0033] In this embodiment, as Figures 1-2 As shown, the groove 3 is configured as three, namely the first groove 301, the second groove 302, and the third groove 303.

[0034] In this embodiment, the depths of the three grooves 3 are 0%-10%, 10%-20%, and 20%-30% of the thickness of the T-shaped test component, respectively. That is, the depth of one end of the first groove 301 is 0% of the thickness of the T-shaped test component, and the depth of the other end is 10% of the thickness of the T-shaped test component, with the depth continuously increasing from one end to the other; the depth of one end of the second groove 302 is 10% of the thickness of the T-shaped test component, and the depth of the other end is 20% of the thickness of the T-shaped test component, with the depth continuously increasing from one end to the other; the depth of one end of the third groove 303 is 20% of the thickness of the T-shaped test component, and the depth of the other end is 30% of the thickness of the T-shaped test component, with the depth continuously increasing from one end to the other.

[0035] In this embodiment, the material of the multifunctional T-shaped test component is hot-formed galvanized steel sheet.

[0036] In this embodiment, the head 1 and the straight arm 2 are an integrated structure.

[0037] In a preferred embodiment, the angle α1 between the line connecting the top and bottom of the groove and the horizontal plane is 60°-84°.

[0038] A method for testing the effect of deformation on LME includes the following steps: after thermoforming, sampling and testing are performed at different deformation positions of the groove 3 of the composite test component to study the effect of deformation on LME. Specifically, sampling and testing are performed at different deformation positions of the first groove 301, the second groove 302, and the third groove 303 of the composite test component to study the effect of deformation on LME.

[0039] A test method for the effect of molding temperature on LME includes the following steps: adjusting the molding temperature of the composite test component during thermoforming, taking the same deformation point for testing, and studying the effect of molding temperature on LME.

[0040] A method for testing collision performance involves thermoforming a composite test component, cutting off the head and straight arm portions, spot welding the Z-shaped straight arm 2 to the flat plate at the lower opening, and then testing the three-point bending performance to evaluate the collision performance of the part.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multifunctional T-shaped test component, characterized in that, It is T-shaped and includes a head and a straight arm connected to the head. The head has multiple grooves, each with an inclined bottom and different depths. The straight arm has a Z-shaped cross-section.

2. The multifunctional T-shaped test component according to claim 1, characterized in that, The plurality of grooves are spaced apart.

3. The multifunctional T-shaped test component according to claim 1, characterized in that, The groove is elongated and extends from the head towards the straight arm.

4. The multifunctional T-shaped test component according to claim 1, characterized in that, The groove is configured as three grooves, namely the first groove, the second groove, and the third groove.

5. The multifunctional T-shaped test component according to claim 4, characterized in that, The minimum and maximum thinning amounts of the first groove are 0% and 10% of the thickness of the T-shaped test component, respectively; the minimum and maximum thinning amounts of the second groove are 10% and 20% of the thickness of the T-shaped test component, respectively; and the minimum and maximum thinning amounts of the third groove are 20% and 30% of the thickness of the T-shaped test component, respectively.

6. The multifunctional T-shaped test component according to any one of claims 1 to 5, characterized in that, The multifunctional T-shaped test component is made of hot-formed galvanized steel sheet.

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