A Computational Framework for 2D Crack Growth Based on the Adaptive Finite Element Method

As a part of damage tolerance assessment, the goal this research is to estimate two-dimensional crack propagation trajectory and its accompanying stress intensity factors (SIFs) using adaptive finite element method. The code was developed Visual Fortran language. advancing-front method used construct an mesh structure, whereas singularity represented through construction quarter-point single elements around tip. To generate optimal mesh, refinement procedure based on posteriori norm error estimator used. splitting node strategy model fracture, follows successive linear extensions for every increment. each extension increment are calculated displacement extrapolation technique. direction determined theory maximum circumferential stress. present study carried out two geometries, namely rectangular structure with holes one central crack, cracked plate four holes. results demonstrate that, depending position hole, propagates in hole due unequal stresses at tip, which caused by hole’s influence. consistent other numerical investigations predicting trajectories SIFs.