A Smoothing Gradient-Enhanced Damage Model
An implicit gradient-enhanced damage model with the characteristic length which is a stress level dependent parameter is developed. Both displacements and nonlocal equivalent strain fields are approximated using low-order elements. The spurious damage zones and stress oscillation induced by the conventional strain-based gradient damage can be eliminated. Numerical examples are considered to show the accuracy and performance of the developed method.
KeywordsGradient damage Fracture FEM Quasi-brittle
- 5.Bui, Q.T., Nguyen, H.A.T., Doan, H.D., Hirose, S.: Numerical failure simulation of quasi-brittle materials using a second-order implicit theory. In: Proceedings of the 4th International Conference on Engineering Mechanics and Automation (2016)Google Scholar