Stress Smoothing in Large Strain, Large Rotation Problems
Stress smoothing using Trefftz polynomials as interpolation functions in connection with moving least squares (MLS) procedure is shown to be efficient approach for infinitesimal elasticity and plasticity. In the case of large displacements the smoothing procedure based on the classical polynomial interpolation over the domain of influence gives satisfactory smoothing effect in the internal points of the domain, but not in the vicinity of the domain boundaries with prescribed tractions. In such points the static boundary conditions are included into the procedure, which leads to the nonlinear MLS problem.
KeywordsMove Little Square Displacement Gradient Smoothing Procedure Static Boundary Condition Undeformed Configuration
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