Impact damage prediction in thin woven composite laminates – Part II: Application to normal and oblique impacts on sandwich structure

摘要: Abstract This article concerns the Finite Element modeling of impacts on composite sandwich structures. Low velocity normal and medium oblique panels made with woven skins a polyurethane foam core are investigated. The ply orientations materials laminate skin varied. is modeled using semi-continuous approach, described in first part this two parts article, which behavior bundles fibers that resin disconnected. represented solid elements continuous material law. strategy provides results accurate enough to represent damage scenario observed experimentally an acceptable calculation time. numerical used analyze mechanisms leading final fracture shape.