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논문 기본 정보

자료유형
학술저널
저자정보
Lee Myoung-Gyu (School of Materials Science and Engineering, Seoul National University) Kim Ji-Hoon (School of Materials Science and Engineering, Seoul National University) Ryou Han-Sun (School of Materials Science and Engineering, Seoul National University) Chung Kwan-Soo (School of Materials Science and Engineering, Seoul National University) Youn Jae-Ryoun (School of Materials Science and Engineering, Seoul National University) Kang Tae-Jin (School of Materials Science and Engineering, Seoul National University)
저널정보
한국섬유공학회 Fibers and Polymers Fibers and polymers 제7권 제3호
발행연도
2006.1
수록면
276 - 285 (10page)

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Development and numerical implementation for an elastoplastic constitutive model for anisotropic and asymmetric materials are presented in this paper. The Coulomb-Mohr yield criterion was modified to consider both the anisotropic and asymmetric properties. The modified yield criterion is an isotropic function of the principal values of a symmetric matrix which is linearly transformed from the Cauchy stress space. In addition to the constitutive equation, the numerical treatment for the singularity in the vertex region of yield surface and stress integration algorithm based on elastoplasticity were presented. In order to assess the accuracy of numerical algorithm, isoerror maps were considered. Also, extension of a strip with a circular hole was simulated and results compared with those obtained using the (smooth) Mises yield criterion to validate stress output for a complex stress state.

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