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

A material testing machine and testing function technology, applied in the direction of testing material hardness, etc., can solve the problem that the change of mechanical properties of loading and unloading materials cannot be reflected in real time, it is difficult to determine the starting point of the residual indentation diagonal, and the material testing machine can be widened. problems, to achieve accurate and reliable measurement, avoid measurement errors, and eliminate errors

Inactive Publication Date: 2006-03-29
INST OF MECHANICS - CHINESE ACAD OF SCI
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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 manuall

Method used

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

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Embodiment Construction

[0038] Preferred embodiments of the present invention are described in detail below in conjunction with accompanying drawing:

[0039] The flow process of the improved test method of the indentation test function of the material testing machine provided by the present invention is as follows: Figure 9 As shown, the specific steps are as follows:

[0040]Step 100: Fix the sample on the sample stage with the test surface facing upward, install the indenter under the load sensor, install a non-contact displacement sensor on the sample stage, and start the material testing machine to load the sample.

[0041] Step 101: Use the signal acquisition module of the computer to collect the load sensor signal of the material testing machine and the signal of the additional non-contact high-resolution displacement sensor in the present invention.

[0042] Step 102: The collected signal of the load sensor and the signal of the displacement sensor are converted to obtain the load and displ...

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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...

Claims

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Application Information

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IPC IPC(8): G01N3/42G01N3/40
Inventor 张泰华郇勇刘东旭杨业敏
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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