Identification of Elasto-plastic Material Properties with Full-field Surface Displacement Measurements

Keita JINNO; Shuichi ARIKAWA; Satoru YONEYAMA; Yasuaki WATANABE; Tatsuhiko ASAI; Kunio SHIOKAWA; Mitsuo YAMASHITA

doi:10.11395/jjsem.14.s147

research-article

Identification of Elasto-plastic Material Properties with Full-field Surface Displacement Measurements

Keita JINNO, Shuichi ARIKAWA, Satoru YONEYAMA, Yasuaki WATANABE, Tatsuhiko ASAI, Kunio SHIOKAWA, Mitsuo YAMASHITA

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Keywords: Inverse Analysis, Virtual Fields Method, Digital Image Correlation, Elasto-plasticity, Ramberg-Osgood

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2014 Volume 14 Issue Special_Issue Pages s147-s152

DOI https://doi.org/10.11395/jjsem.14.s147

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Abstract

In this study, an inverse analysis method for determining the material properties from measured displacements for a power-law hardening material is proposed. Displacement distributions on a specimen surface under load are measured using digital image correlation. The virtual fields method combined with the total strain theory is used as a method for inverse analysis. The effectiveness of the proposed method is demonstrated by applying to aluminum specimens under three-point bending. Results show that the material properties after yielding can be identified from the displacement fields by the proposed method.

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