Contact Laws

Introduction

NairnMPM and OSParticulas implement contact physics on crack surfaces and between materials in multimaterial mode by using contact laws. Each contact law can define [#Frictional Contact Laws|frictional contact]] or describe an imperfect interface. Contact laws are assigned to crack or material surfaces by using the ContactCracks or ContactMM commands, by using the Contact material property, or by choosing a custom contact law in the NewCrack command. This section explains the p]]ossible contact laws.