Generalization of the pinball contact/impact model for use with mesh adaptivity and element erosion in EUROPLEXUS

This report presents the generalization of the pinball-based contact-impact model (PINB) of the EU- ROPLEXUS code for use in conjunction with mesh adaptivity, i.e. with adaptive mesh refinement and un-refinement. The interaction of the pinball model with the mechanism of element failure and erosion is also revised. EUROPLEXUS (also abbreviated as EPX) is a computer code jointly developed by the French Commissariat à l'Energie Atomique (CEA DMT Saclay) and by EC-JRC. The code application domain is the numerical simulation of fast transient phenomena such as explosions, crashes and impacts in complex three-dimensional uid-structure systems. The Cast3m software from CEA is used as a pre-processor to EPX when it is necessary to generate complex meshes.