Application of PVDF Gauges in Solid Interface

Proceedings

Xie, Ruoze¹  Deng, Zhifang²  Zhang, Fangju³ 

[1] Author to whom correspondence should be addressed.;Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621000, China;Presented at the 18th International Conference on Experimental Mechanics (ICEM18), Brussels, Belgium, 1–5 July 2018

关键词: PVDF gauge;    SHPB experiment;    stress concentration;    strain gauge;   

DOI  :  10.3390/ICEM18-05359

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

It’s difficult to directly measure the pressure on the surface of the material in the impact process. PVDF (Polyvinylidene Fluoride) gauges may help to solve this problem. In this paper, some split Hopkinson pressure bar (SHPB) experiments were carried out with the PVDF gauges as specimens, with the strain gauges pasted on the bars being used as the measurement method. By comparing the results of the strain gauges and the PVDF gauges, it is proved that there is a stress concentration when the PVDF gauges were sandwiched directly in the solid interface. Then, two methods to eliminate the stress concentration are verified by experiments. The first method is adding a cushion, such as electrical tape. The second method is using 502 glue, which is evenly coated on the interface.

【 授权许可】

CC BY