Decohesion Elements using Two and Three-Parameter Mixed-Mode Criteria

摘要

An 8-node decohesion element implementing differentrncriteria to predict delamination growth under mixed-modernloading is proposed. The element is used at the interfacernbetween solid finite elements to model the initiation andrnpropagation of delamination. A single displacement-basedrndamage parameter is used in a softening law to track therndamage state of the interface. The power law criterion and arnthree-parameter mixed-mode criterion are used to predictrndelamination growth. The accuracy of the predictions isrnevaluated in single mode delamination and in the mixedmodernbending tests.