Improved method of impression testing function for material tester and improving device thereof

Abstract

The invented improved method includes the following steps: firstly, measuring loaded / unloaded displacement-loaded curve, then utilizing pressed depth measurement method to making data process so as to obtain hardness and modulus of the tested material. The improved equipment of the material testing machine also includes a sample table directly mounted on the base of material testing machine and a non-contact type displacement sensor mounted on the sample table of material testing machine.

Description

technical field [0001] The invention relates to a method for testing mechanical properties of materials and a testing device thereof, in particular to a method for improving the indentation test function of a material testing machine and an improving device thereof. Background technique [0002] At present, most of the material testing machines used to test the mechanical properties of materials use load sensors to measure the load, and the driving mode is mostly driven by motors. Although they have functions such as tension, compression, bending, shearing, and torsion, they are not good at indentation tests. In order to obtain the mechanical parameters such as the hardness of the material. Although there are some material testing machines that can be equipped with indenters for hardness testing, it is necessary to image the residual indentation after the indentation test to measure the surface area of ​​the residual indentation to calculate the hardness. This measurement m...

AI Technical Summary

Problems solved by technology

Therefore, when using indentation test to study the mechanical properties of these materials, the traditional hardness test encountered insurmountable difficulties

First, not all materials have obvious residual indentation boundaries. For such materials, it is difficult to determine the starting point of the residual indentation diagonal

Second, many hardness testers, especially when imaging residual indentations, are manually operated, which will undoubtedly bring human errors to the measurement results

Third, traditional methods cannot reflect the changes in mechanical properties of materials during loading and unloading in real time

Therefore, applying this method to the traditional material testing machine will greatly expand the function of the material testing machine, and this function cannot be realized by the conventional hardness tester.

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