축대칭 프레스가공 제품의 변형률 예측기술과 변형여유 해석에의 적용

A method of calculating strain state and forming severity analysis for axisymmetric sheet formed parts.

A method of obtaining deformation severity of axisymmetric shape deep-drawn products was developed. Strain states of products produced by single or multi-stage drawing were predicted by using finite element analysis. This method used minimization of potential energy between the known shape of final product and the unknown in initial blank. And that was done numerically by nonlinear finite element method. Deformation theory of plasticity was used for practical purposes. From predicted strain states of drawn parts, deformation severity was found by using forming limit diagrams.