The boundary element method is employed in this study in conjunction with the finite element method to build a multi-physics hybrid numerical model for the computational study of stress corrosion cracking related to hydrogen diffusion in polycrystalline microstructures. More specifically a boundary integral representation is used to represent the micro-mechanics of the aggregate while an explicit finite element method is used to model inter-granular hydrogen diffusion. The inter-granular interaction between contiguous grains is represented through cohesive laws, whose physical parameters depend on the concentration of inter-granular hydrogen, diffusing along the interfaces according to the Fick's second law. The model couples the effectiveness of the polycrystalline boundary element micro-mechanics model with the generality of the finite element representation of the inter-granular diffusion process. Few numerical tests are reported, to demonstrate the potential of the proposed technique.
|Titolo della pubblicazione ospite||Advances in Boundary Element and Meshless Techniques XX|
|Numero di pagine||6|
|Stato di pubblicazione||Published - 2019|
Gulizzi, V., Milazzo, A., & Benedetti, I. (2019). Modelling stress-corrosion microcracking in polycrystalline materials by the Boundary Element Method. In Advances in Boundary Element and Meshless Techniques XX (pagg. 194-199)