Comparative study of the strain gauge and 3D digital image correlation testing methods under hydrostatic conditions of composite shells

Feng Luo; Xiangshao Kong; Zeyu Jin; Peng Wang; Hu Zhou; Zihan Zhu; Han Gao

doi:10.1117/12.3007146

25 October 2023 Comparative study of the strain gauge and 3D digital image correlation testing methods under hydrostatic conditions of composite shells

Feng Luo, Xiangshao Kong, Zeyu Jin, Peng Wang, Hu Zhou, Zihan Zhu, Han Gao

Author Affiliations +

Proceedings Volume 12801, Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023); 128010X (2023) https://doi.org/10.1117/12.3007146
Event: Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023), 2023, Dalian, China

Abstract

Experimental strain testing of composite shells under 15MPa hydrostatic pressure was conducted using both strain gauges and underwater 3D-DIC (Digital Image Correlation) testing technology. The experimental results showed a large error in the measurement results of strain gauges when small-sized components were present in the test area of the experimental object. The average standard deviation of the strain results was 716.1 με and the average standard deviation of the Mises stress results was 120.9 MPa. However, the strain results of the underwater 3D-DIC test system in the circumferential direction of the composite shell were generally consistent. This proves that the system can maintain good test accuracy even under high hydrostatic pressure environments.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Feng Luo, Xiangshao Kong, Zeyu Jin, Peng Wang, Hu Zhou, Zihan Zhu, and Han Gao "Comparative study of the strain gauge and 3D digital image correlation testing methods under hydrostatic conditions of composite shells", Proc. SPIE 12801, Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023), 128010X (25 October 2023); https://doi.org/10.1117/12.3007146

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KEYWORDS

Digital image correlation

3D modeling

Testing and analysis

3D image processing

Environmental sensing

Foam

Imaging systems

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