抄録
An application of the finite element method (FEM) to analysis of deformation of such anisotropic polymer solids as drawn polymer film was carried out. The stress-strain curve during the second extension of polymer film in different directions to its initial draw direction was assumed to behave like that of an elastic-plastic material with strain hardening.
On the basis of the above assumption, the yield criteria of anisotropic polymer solids were proposed and employed for the calculation in FEM.
Furthermore, plasticized polyvinyl chloride film was taken as an example, and FEM analysis and experimental investigation were performed to determine the stress and strain distribution during uni-axial extension at a constant rate. The comparison between calculated and measured strain distributions showed that the yield criteria for anisotropic polymer film developed in this paper were adequate.
