Three-dimensional crystal plasticity finite element modeling method and system for crystal material part

Abstract

The invention discloses a three-dimensional crystal plasticity finite element modeling method and system for a crystal material part. The method comprises the steps of obtaining the data of a real crystal material part, and obtaining a distribution rule according to the obtained data, generating grain size data for the minimum directional bounding box of the crystal material part model through the obtained grain size data distribution rule, generating a grain size model of the minimum directional bounding box, removing redundancy of the grain size model to obtain a three-dimensional pseudo-random grain size microstructure of the crystal material part, iteratively giving orientation to each grain in the three-dimensional pseudo-random grain scale microstructure through the obtained grain orientation data distribution rule and the obtained crystal boundary orientation difference data distribution rule, constructing a crystal plasticity finite element model of the crystal material part through the obtained three-dimensional pseudo-random grain scale microstructure of the crystal material part and the orientation data of the grains, and realizing crystal plasticity finite element simulation. The method can be used for mechanical property simulation and service simulation.

Description

technical field [0001] The invention relates to the technical field of finite element model modeling, in particular to a three-dimensional crystal plastic finite element modeling method and system for crystal material parts. Background technique [0002] The statements in this section merely mention the background technology related to the present invention and do not necessarily constitute the prior art. [0003] There are two main problems in the existing crystal plastic finite element modeling technology of crystal material parts: [0004] The existing grain-scale microstructure modeling methods mainly include the EBSD layered slice method and the Voronoi random generation method, both of which have shortcomings. The Voronoi random generation method uses triangulation technology to randomly create a grain-scale microstructure model. This method does not consider the real grain-scale microstructure information of the material, which is quite different from the actual situ...

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Problems solved by technology

[0006] In view of the fact that the actual microstructure of the material and the geometric elements of the part are not fully considered in the prior art, resulting in a large difference between the established grain-scale microstructure model of the crystal material part and the actual situation, and the inaccurate results of the finite element simulation of crystal plasticity, this paper The invention proposes a finite element modeling method for 3D crystal plasticity of crystal material parts that combines the real microstructure and geometric elements of the part, which can fully consider the statistical information of the 3D grain-scale microstructure of the material and the geometric elements of the part, and establish high-quality crystal plasticity. Finite element simulation model, which greatly improves the simulation accuracy

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