3-D転位動力学と有限要素法の大規模並列連成解析

抄録

It is well known that the embrittlement of metal materials is promoted by neutron irradiation. In order to improve the reliability of structural integrity assessment it is necessary to understand the embrittlement mechanism. Discrete Dislocation Dynamics (DDD) simulations have proven to be an effective tool for handling the dislocation and the movement of dislocation in infinite space. However, only the periodic boundary conditions are considered in traditional DDD simulation. In this paper, we develop a three-dimensional (3D) numerical model considering the actual boundary conditions by coupling 3D DDD and FEM to simulate the dislocation movement. The analysis is based on the superposition principle. We use the DDD code to compute the solution for dislocations in a nanoscale crystal. The external and internal boundaries are solved by parallel large-scale FEM code – ADVENTURE_Solid.