Numerical Simulation of Fracture in Coatings Subjected to Sudden Temperature Change Using Element-Free Galerkin Method
- 879 Downloads
The article presented broadens the dexterity of element-free Galerkin method (EFGM) for analysis of thermal fracture in case of materials with coatings under plane stress conditions. A conjugated modeling approach developed and employed in this work by amalgamation of jump function approach and enrichment criterion. This approach allows the successful modeling of multiple weak and strong discontinuities in one domain. To distinguish the interface of two materials, jump function methodology is used, while for capturing the stress field oscillations around the crack tip are intrinsic enrichment criterion is put to use. The interaction integral scheme for thermal fracture has been modified to compensate thermal strains for generating mode-I stress intensity factors (SIFs). The effect of mechanical properties on crack under sudden temperature change is compared using three cases in which Zinc and Steel substrates are used (Steel/Zinc/Steel configuration and Zinc/Steel/Zinc configuration) and compared with results of mono-material configuration.
KeywordsEFGM SIF Thermal fracture Coatings
- 4.Belytschko T, Lu YY, Gu L (1995) Crack propagation by element-free Galerkin methods. Eng Fract Mech. 51:295–315Google Scholar