Split type micro extensometer for measuring tensile deformation of small in-situ tension tester

Abstract

The invention relates to a split type micro extensometer for measuring tensile deformation of a small in-situ tension tester and belongs to the technical field of precise sensors and precise instruments. Fixing clips are close to the side surface of a sample, clamping clips are fixedly connected with the fixing clips through rotary shafts, the clamping clips provided with cutting edges clamp the sample and are tightened with the fixing clips through rubber bands, and a capacitive displacement sensor and a measuring plate fixing rack are connected with the fixing clips through screws. The wholeextensometer is very compact in size due to adoption of tiny sensing elements and can be applied to micro tension samples with 8-20 mm long gauge length sections, and the gauge length sections of thesamples cannot be shielded and in-situ imaging of the samples in the experiment process is not affected by the aid of the split type structure. The extensometer has the advantages as follows: the extensometer is compact in structure, small in size, high in precision and particularly applicable to deformation measurement of in-situ tension tests for material micro-mechanical properties under a scanning electron microscope.

Description

technical field [0001] The invention relates to the technical field of precision sensors and precision instruments, in particular to the technical field of material mechanics test equipment, especially to a split-type miniature extensometer for measuring the tensile deformation of a small in-situ extensometer. Background technique [0002] With the improvement of material science research level, material performance testing machine is developing towards miniaturization and microcosmization. A series of in-situ micro-mechanical performance testing instruments for materials came into being. In order to obtain microscopic images of the microscopic deformation and failure behavior of materials, this type of instrument is often integrated with imaging devices such as scanning electron microscopes. Therefore, the instrument adopts a miniaturized design, and its sample size is much smaller than that of traditional mechanical performance test samples. Traditional conventional exten...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a split type miniature extensometer for measuring the tensile deformation of a small in-situ extensometer, which solves the problem that the extensometer in the prior art cannot be integrated with a small in-situ extensometer and obtains the tensile deformation of the material The problem

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