Ting Du1, J. P. Xu1, Y.Q. Liu2, Z. B. Zhang1
CMES-Computer Modeling in Engineering & Sciences, Vol.51, No.2, pp. 93-114, 2009, DOI:10.3970/cmes.2009.051.093
Abstract An eight-node hexahedral element with four-point quadrature in plane is developed using the assumed strain method, which can eliminate volumetric locking of incompressible material and absence of the portion of shear velocity strain related with hourglass mode to suppress hourglass mode and shear locking. In this approach, the radial return algorithm is adopted for more precise calculation of internal forces, stress and strain. In addition, a co-rotational coordinates system is established to make bending simulation much more effective, and the system is applicable to arbitrary 3D anisotropic yield criteria. A large elastic-plastic deformation of unconstrained thick plate bending example is… More >
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