Abstract
A strategy for direct generation of tool shapes from a CAD model expressed by NURBS surfaces is presented in this paper. Several algorithms that are necessary for direct generation of tool shape are developed. The shapes of objects are defined by NURBS surfaces and the NURBS control points are used as nodes in a meshless method of analysis. A new approach to construct N-sided surfaces is proposed in the paper. An iterative meshless method is developed to design a die surface that compensates for springback in stamped sheet metal. All of the emphasis is on the NURBS-based objects and the meshless treatment of large plastic deformation and complicated contact conditions.
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