r7.02.20 Computation of T-stress by extrapolation of displacement field

Abstract:

The computation of T-stress is implemented for linear, homogeneous and elastic-isotropic materials with plane crack mesh (FEM only). The accuracy of T-stress results obtained by extrapolation of the displacement fieldmethod is clearly improved if the meshing elements are quadratic. It is also highly recommended to use « Barsoum » type elements in the crack tip (elements where the mid-side nodes are located at the quarter of edges).

• 1. Theory
• 2. Implementation of extrapolation method
• 3. Accuracy of Suggested Method
• 4. Conclusion
• 5. Bibliography
• 6. Description of the document versions