Measuring true stress-strain curves of cylindrical bar samples with mirror-assisted multi-view digital image correlation
Measuring true stress-strain curves of cylindrical bar samples with mirror-assisted multi-view digital image correlation
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DOI：
10.1111/str.12403
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发表时间：
2021-11-02
期刊：
影响因子：
2.1
通讯作者：
Pan, Bing
中科院分区：
文献类型：
--
作者：
Chen, Bin;Pan, Bing
This paper proposes to measure true stress-strain curves at the necking region of cylindrical bar samples by using an advanced mirror-assisted multi-view digital image correlation (MV-DIC) technique. The mirror-assisted MV-DIC can measure the panoramic shape and deformation fields of a cylindrical bar sample with only a single two-camera stereo-DIC system and two planar mirrors. The measured panoramic shape enables accurate determination of the cross-section area and radius of curvature at the necking region by using cylindrical or torus fitting. The retrieved cross-section area and radius of curvature at the necking region further enable the measurement of the true stress-strain curves and even the Bridgman's correction of the true stress.
