*Advances in Fatigue and Fracture Testing and Modelling*

traditional FEM and XFEM to give the same accuracy levels. The adopt of subtriangle technique for numerical integration, proper support field, and enrichment functions at the crack site has been shown to significantly increase the resolution of the solution. In addition, numerical simulation showed little effect of increasing incision length on the propagation path compared to the available experimental and numerical results. It is clear in this example that the growth of the crack is moving towards the soft side. There is no effect for increasing the crack length on the propagation path for current research with experimental work.

Additionally, the gradation of materials has no effect on the incision path of bending cases. Use of incompatible interaction integration method provides very accurate results for SIFs values.
