A three-point bending support device based on the dynamic fracture toughness of test materials

Abstract

The invention belongs to the field of experimental equipment for testing material dynamic fracture toughness, in particular to a three-point bending support device based on testing material dynamic fracture toughness. The device includes a base plate and a vertical plate. The base plate and the external support form a detachable fit. The vertical plate is arranged with a groove or a through hole that runs through the plate body. The groove or through hole is arranged at the travel path of the loading rod; The device also includes a lining plate arranged on the bottom plate and arranged parallel to the plate surface between the vertical plates. The lining plate is arranged at the other end of the vertical plate relative to the impact direction of the loading rod, and there is also a passage for the loading rod to pass through. The hole portion; the liner unit for padding the sample to be tested is also arranged on the liner; the support direction of the liner unit relative to the sample to be tested is opposite to the direction of the force applied by the loading rod. The device has a high degree of standardization, which can effectively realize the requirements of easy disassembly and easy maintenance of the device, and at the same time ensure the uniformity of the overall data collection, so that the work is reliable and stable.

Description

technical field [0001] The invention belongs to the field of experimental equipment for testing material dynamic fracture toughness, in particular to a three-point bending support device based on testing material dynamic fracture toughness, which is used for evaluating and testing the fracture resistance of metal material structures under impact loads. Background technique [0002] With the continuous development of social science and technology, the application of fracture mechanics in engineering has become quite common. In order to analyze the fracture of engineering structures, it is necessary to pass tests to obtain the fracture characteristic data of materials or structures, so that science can be better applied . The fracture test involves a wide range. According to the scale of the test, the fracture test can be divided into small laboratory tests, large laboratory tests and actual structural tests; according to the loading speed, it can be divided into static tests ...

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Problems solved by technology

[0003] Although the overall operation process and concept of the current above-mentioned three-point bending experiment have tended to be perfected, the physical experiment structure still has certain defects: the above-mentioned sample support device is often set as follows figure 1 Although the fixed part shown in the figure has the function of bearing a certain impact load, on the one hand, the overall structure is bulky and bulky, which is extremely unfavorable for disassembly, replacement and maintenance, which often brings additional burdens to operations such as handling and maintenance; on the other hand On the one hand, there is no unified standardized design for the actual structure of the sample support device, and the size is often drawn up and adopted by each experimental department, which is also a major factor that leads to different test results among various experimental departments

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