FE simulation of rupture of diaphragm with initiated defect

Abstract

Nonlinear FE deformation and rupture analysis of the shock tube diaphragm behavior under pressure is pre-sented. The combined three-dimensional finite element model is suitable for describing deformation and rupture in the investigation. Plastic deformation zones after loading are concentrated along the clamped boundary and along the defect area. Their values and distribution depend on the load value and defect depth. The FE model for rupture analyses is simulated with special link elements. The rup-ture of diaphragms with smaller defect causes higher plastic strains in the contour and may be results of undesired rup-ture of the diaphragm on the contour.