S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Material Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
Numerical Implementation of Modified Coulomb-Mohr Yield Criterion for Anisotropic and Asymmetric Materials
- Lee, Myoung-Gyu; Kim, Ji Hoon; Ryou, Hansun; Chung, Kwansoo; Ryoun, Jae Ryoun; Kang, Tae Jin
- Issue Date
- The Korean Fiber Society
- Fibers and Polymers, v.7(3), pp.276-285
- 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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