Estimated delamination of an elastic-plastic liner in a high-pressure metal composite vessel

Abstract

To carry out delamination analysis in high-pressure metal composite vessels, a software approach is proposed in which the dynamic calculation algorithm is implemented in software systems. The algorithm is built on three points: the introduction of technological deviations (at the level of permissible defects), the determination of a three-dimensional stress-strain state, and a real-time solution. As a calculation program, LS-DYNA was selected in a dynamic formulation with the structure divided into 3D solid elements and unilateral constraint on the contact surface of the metal (liner) and composite shells was introduced. A geometrically and physically nonlinear problem is solved. The moment of liner delamination from the composite shell is determined by the change in the liner stress-strain state and by the liner deformable surface in time presented visually.