Finite element modeling of crack extension under impact was performed to study the suitability of layered composite structures in plasma-facing and primary wall structures for ITER and other fusion devices. The layers may consist of dissimilar metal alloys, each of which performs a necessary design function for sputtering resistance, heat removal, and structural integrity. Several layered structures with varying material properties were modelled using finite element analysis. Compared to monolithic solid bars with the same mechanical properties, layered structures with frictional interfaces dissipate more energy before a pre-crack normal to the interface can propagate. For these layered structures, there is an optimum for the coefficient of friction that provides maximum resistance to crack extension.
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Materials Science(all)
- Nuclear Energy and Engineering