Material microstructure evolution simulation solved on the basis of exponential time difference format

TL;DR: In this paper, a method for material microstructure evolution simulation solved on the basis of an exponential time difference format, and a device is presented, which is based on the reaction rate theoretical model of a substance defect, the model being expressed by using an equation and the equation comprising a linear term having a coefficient represented by using a matrix.

Abstract: A method for material microstructure evolution simulation solved on the basis of an exponential time difference format, and a device. Said method comprises: establishing a reaction rate theoretical model of a substance defect, the model being expressed by using an equation, and the equation comprising a linear term having a coefficient represented by using a matrix; iteratively solving the equation by using an exponential time difference format, and during the iterative solution, integrating the linear term having a coefficient being an exponential power of the matrix. The rate theory has no space-time scale limitation, and therefore when simulating the evolution of a microstructure under a high damage dose condition, the advantages of the rate theory can be obviously embodied, and then the exponential time difference format is used to solve the equation, obtaining a solved result having better accuracy and higher precision.