A crack length control scheme for solving nonlinear finite element equations in stable and unstable delamination propagation analysis

作者：Gasco Federico^*; Feraboli Paolo

来源：Composite Structures, 2014, 117: 267-273.

DOI：10.1016/j.compstruct.2014.06.038

• Delamination
• Damage mechanics
• Finite element analysis (FEA)
• Virtual crack closure technique

An automatic incremental solution algorithm for nonlinear static finite element analysis of delamination propagation problems is presented. This load-displacement-constraint method iterates in the load displacement space utilizing the Newton-Raphson method, allowing to trace out the complete equilibrium path. The procedure can calculate pre- and post-critical responses of bi-dimensional problems, ranging from stable delamination growth to structural collapse by unstable growth or delamination buckling with arbitrarily sharp snap-back instabilities. Benchmark solution examples of established composite materials structural problems illustrate the effectiveness of the method.

• 出版日期2014-11