Failureanalysis of pressure sensors in vibration environment

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (2) : 207-211.

CUI Hongmin1,CHEN Baocheng1,CUI Guanghao1,DING Zhongkai1,HU Yuncong2

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Abstract

In a complex vibration environment,some kind of pressure sensors with specific structure may often meet the case of internal down-lead fracture due to vibration fatigue,which can be determined through the observation of internal down-lead cross section and fracture profile. The mechanical model of the lead wire was simplified as a Bernoulli-Euler beam. Its fundamental frequency was calculated theoretically and compared with the results of finite element analysis. It is proved that the finite element model can reflect the dynamics of sensor accurately. Applying proper finite element,a modal analysis was carried out,the results of calculation and test were compared,and the reason of fracture,revealed by the analysis,was proved to be correct.

Key words

pressure sensor / failure mechanism / finite element / resonance oscillation / fatigue fracture

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CUI Hongmin1,CHEN Baocheng1,CUI Guanghao1,DING Zhongkai1,HU Yuncong2. Failureanalysis of pressure sensors in vibration environment[J]. Journal of Vibration and Shock, 2017, 36(2): 207-211

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