High frequency responding high temperature drawing-twisting fatigue extender

Abstract

The invention of a high frequency response high temperature drag-twist fatigue extensometer belongs to modified technique of drag-twist fatigue tester including displacement sensor and dual-direction two liver mechanism which includes two inisopachous wall right angle type stressedpiston installed symmetrically with facing ends of vertical thick walled board linked with a quartz thimble separately and drag-twist atresser, torsion moment measuring machine, stretching tester linked successive towards outer with two thin walled boards. The drag-twist atresser includes two rotating shafts, spring slice and support stick linking to it, the torsion moment tester in stretching tester includes rotation reflecting plate and torsion moment displacement senser and the stretch tester includes axial reflecting plate and axial displacement sensor. The invention has the advantages of simple installation, fast dynamic response of measurement, small temperature drift, wide measuring range, long life and high accuracy.

Description

Technical field: [0001] The invention relates to a high-frequency response high-temperature pull-torsion fatigue extensometer, which belongs to the improvement technology of the pull-torsion fatigue tester for materials. Background technique: [0002] At present, there are only uniaxial fatigue extensometers in China, and there is no manufacturing technology for multiaxial fatigue extensometers, and the testing principle of uniaxial extensometers is still based on the strain gauge method, which has not fundamentally overcome the inherent shortcomings of the strain gauge method. For example, the test accuracy is greatly affected by the quality of the patch, temperature drift, slow dynamic response, small measurement range, short service life, etc. At the same time, the existing extensometer cannot be used for high temperature material testing, so its applicability is poor. Invention content: [0003] The object of the present invention is to provide a high-frequency respons...

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Problems solved by technology

[0002] At present, there are only uniaxial fatigue extensometers in China, and there is no manufacturing technology for multiaxial fatigue extensometers, and the testing principle of uniaxial extensometers is still based on the strain gauge method, which has not fundamentally overcome the inherent shortcomings of the strain gauge method. For example, the test accuracy is greatly affected by the quality of the patch, temperature drift, slow dynamic response, small measurement range, short service life, etc. At the same time, the existing extensometer cannot be used for high temperature material testing, so its applicability is poor

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