Transactions of Materials and Heat Treatment

Title：Improvement of load oscillation in highspeed tension by strain gauge force sensor

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ClassificationCode：TG142；O329

year,vol(issue):pagenumber：2019,44(8):124-128

Abstract：

The highspeed tensile test using a hydraulic servo tester is the most direct experimental method to obtain the dynamic mechanical properties of material, but the load oscillation problem often occurs at higher tensile strain rates. For B410LA and DP1180 steels produced by Baosteel, the uniaxial tensile test was conducted at different strain rates by the orginal piezoelectric force sensor of test mechine and the improved strain gauge force sensor, and the timeload curves at different strain rates were compared. It is found that with the increasing of strain rate, the oscillation amplitude of the piezoelectric force sensor increases significantly, when the strain rate reaches 500 s-1 and above, the load oscillation amplitude reaches 30%~40%, and the measurement accuracy of load is affected. Furthermore, the oscillation amplitude shown on the time-load curve is controlled within 10% by the strain gauge force sensor in the case of the tensile strain rate less than 500 s-1.

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作者简介：郑韬（1983-），男，本科，助理工程师 E-mail：13774293603@139.com

Reference：

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