Application of Digital Image Correlation Method to In-Situ Dynamic Strain Measurement

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  • (School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

Online published: 2017-12-03

Abstract

Application of digital image correlation (DIC) method to determination of in-situ dynamic strain is presented in this study. Firstly, an integrative software is programmed based on the DIC algorithms and pointwise least-squares fitting technique. Then, simulated speckle images are generated to study the computational accuracy of this software. The experimental setup and procedures for measuring in-situ dynamic strain through both DIC and strain gauge are proposed. The DIC results are close to those measured by strain gauge. This fact reveals that DIC is a practical and effective tool for in-situ dynamic strain measurement. Finally, the full-field in-situ dynamic strain of another specimen is measured by DIC, and the overall distribution of the strain in the measurement area is clearly shown.

Cite this article

LIN Liexiong (林烈雄), LU Hao* (陆皓), XU Jijin (徐济进),CHEN Junmei (陈俊梅), YU Chun (余春) . Application of Digital Image Correlation Method to In-Situ Dynamic Strain Measurement[J]. Journal of Shanghai Jiaotong University(Science), 2017 , 22(6) : 719 -725 . DOI: 10.1007/s12204-017-1864-y

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