Parallel solving method for simulating dislocation motion of nuclear reactor key material

Abstract

The invention provides a parallel solving method for simulating dislocation motion of a nuclear reactor key material. The parallel solving method can improve the solving speed. The method comprises the steps that S1, adding astress to a dislocation line, updating point defects on the dislocation line at the same time, and simulating dislocation motion and a calculation model of interaction betweenthe dislocation motion and the point defects on the mesoscopic scale; S2, dividing all structural evolution mechanical equations in the calculation model into a plurality of processes, and solving the structural evolution mechanical equations in parallel to obtain a resultant line tension force applied to each point defect by a dislocation line; S3, judging whether a pinning removing or bypassingcondition is met according to the obtained resultant line tension, and if not, returning to the step S1; if yes, resetting the stress to 0, and returning to S1; and S4, circularly executing accordingto the steps S1-S3 until the dislocation line passes through all point defects on the sliding plane. The invention relates to the field of nuclear materials.

Description

technical field [0001] The invention relates to the field of nuclear materials, in particular to a parallel solution method for simulating dislocation movement of key materials of nuclear reactors. Background technique [0002] Dislocations are inherent defects in a material, and the crystal slip process is carried out by the movement of dislocations. Dislocations are easy to trap point defects and small defect clusters produced by irradiation to form dislocation loops, which have a decisive impact on the mechanical properties of materials such as hardening. Dislocation Dynamics (DD, Dislocation Dynamics) is usually used to study the movement of dislocations in materials and their interactions with other defects. The key to dislocation dynamics lies in the discretization of the mechanical equations for the structural evolution of dislocation segments. The structural evolution mechanical equation of structural evolution is the basis of dislocation dynamics. Its basic idea i...

AI Technical Summary

Problems solved by technology

However, in the field of nuclear materials, the parallel computation of dislocation motion and interaction of point defects is still a gap

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