Dependence of micro-morphology of electrical strain gauges on stress distribution

Zhigang Wang; Chi Xiao; Yunlong Mao; Yinming Zhao; Zili Zhou; Yongqian Li

doi:10.1117/12.2512044

7 March 2019 Dependence of micro-morphology of electrical strain gauges on stress distribution

Zhigang Wang, Chi Xiao, Yunlong Mao, Yinming Zhao, Zili Zhou, Yongqian Li

Proceedings Volume 11053, Tenth International Symposium on Precision Engineering Measurements and Instrumentation; 110532U (2019) https://doi.org/10.1117/12.2512044
Event: 10th International Symposium on Precision Engineering Measurements and Instrumentation (ISPEMI 2018), 2018, Kunming, China

Abstract

We investigated the determinations by the micro-morphology of the sensitive grids of resistance strain gauge on their stress distributions. The micro-morphologies of the sidewalls for four typical resistance strain gauges were observed by scanning electron microscopy (SEM), and then the microscopic images were binarized to obtain the micromorphological characteristics of the sensitive grids. The observation shows that the sidewalls of the sensitive grids have periodic microstructures. A geometrical model of sinusoidal contour and a strain transfer model was established following the observed micro-morphological features. The influence of the amplitude and period parameters of the sinusoidal contour on the stress level of the sensitive grid was calculated numerically. The results show that the maximum stress increases, however the average stress decreases, with the increase of the profile amplitude with a certain periodicity. For a sinusoidal profile having a fixed amplitude, its maximum stress decreases with the increase of the cycle, wherever the average stress increases. The smaller side wall defects and longer interval in a sensitive grid would make the stress distribution more uniform. The obtained results would provide guidance for the fabrication of the resistance strain gauge.

Citation Download Citation

Zhigang Wang, Chi Xiao, Yunlong Mao, Yinming Zhao, Zili Zhou, and Yongqian Li "Dependence of micro-morphology of electrical strain gauges on stress distribution", Proc. SPIE 11053, Tenth International Symposium on Precision Engineering Measurements and Instrumentation, 110532U (7 March 2019); https://doi.org/10.1117/12.2512044

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available