Superconvergent second derivative recovery technique and its application in a nonlocal damage mechanics model
A nonlocal finite element technique is proposed that is based on the superconvergent second derivative recovery methods. A way to construct element-based patches is proposed that is suitable for unstructured meshes. The proposed technique is implemented with a simplified Hessian matrix computation process. The proposed technique is verified by the recovery of the equivalent strains in a nonlocal damage mechanics model.
nonlocal damage mechanics super-convergent patch strain gradients finite element method