A Computational Model for Contact Stress Problems.
VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF ENGINEERING SCIENCE AND MECHANICS
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A mixed finite element model based on the incremental, updated Lagrangian, nonlinear description of continua is developed using a mixed virtual work statement, and its application to planar elastic contact problems is discussed. The computational model is evaluated by comparing the numerical results with those obtained by a displacement finite element model. The mixed model, which contains displacements and stresses as nodal degrees of freedom, yields accurate stresses while the displacements are no better than those of the displacements finite element model. Author