Three-point bending supporting device based on dynamic fracture toughness of test material

Abstract

The invention belongs to the field of experiment equipment for testing the dynamic fracture toughness of a test material, and in particular relates to a three-point bending supporting device based on the dynamic fracture toughness of a test material. The device comprises a base plate and a vertical plate, wherein the base plate and an external support are detachably matched with each other; a groove or a through hole penetrating through a vertical plate body is formed in the vertical plate and is positioned at a loading rod traveling path. The device further comprises a lining plate which is arranged on the base plate, is parallel to the plate surface of the vertical plate and is arranged at the other end, which is opposite to the collision direction of a loading rod, of the vertical plate; a through hole part, through which the loading rod passes, is formed in the lining plate; a lining pad unit for holding a test sample to be tested is also arranged on the lining plate; the supporting direction, which is relative to the test sample to be tested, of the lining pad unit is opposite to the loading rod force application direction. The device is high in standardization degree, can effectively meet requirements on easy detaching and easy maintenance, and can also guarantee the uniformity of whole data acquisition so as to work reliably and stably.

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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