ELASTIC-VISCOPLASTIC DIFFERENTIAL-EQUATIONS ON A MANIFOLD MODELING OFINPLANE STRETCHING OF SHEET-METAL

The computational method for large deformation plasticity called diffe rential equations on a manifold (DEM) has previously been shown to be effective for axisymmetric and plane strain sheet metal forming proble ms. The method has now been formulated for in-plane stretching problem s, incorporated into a computer code, and applied to several problems. The code's performance is robust and accurate, as evidenced by a comp arison with other published results. Incorporation of an automatic mes h generator significantly reduces data preparation time.