断裂相场模型的三维自适应有限元方法OA北大核心CSTPCD

A robust predictor-corrector algorithm was developed and a 3D adaptive finite element analysis for the fracture phase-field model was established.This model can deal with complex fracture problems convenient-ly,avoiding extra tracking of crack paths and without mesh-dependency.However,the 3D phase-field modeling usually requires extremely fine meshes,which brings reduction of the solving efficiency.Aimed at this problem,the predictor-corrector adaptive mesh refinement algorithm was developed based on a staggered solution scheme,to achieve high-precision analysis of crack propagation in 3D structures.Numerical examples show that,the developed method can accurately and reasonably describe crack propagation in structures,and the meshes can be adaptively refined along the crack propagation paths.