Virtual experiment method and device for anisotropic mechanical behavior of metal material

Abstract

The invention relates to a virtual experiment method and device for anisotropic mechanical behaviors of a metal material. The method comprises the following steps: constructing a microstructure representative voxel model according to an electron back scattering diffraction experiment result of the metal material to be experimented; specifying a deformation number and a deformation degree, and generating any periodic boundary condition through a random number generator; performing full-field crystal plasticity simulation according to the microstructure representative voxel model and any periodic boundary condition, and extracting a yield stress point of the microstructure representative voxel model under a specified deformation degree, so as to fit yield function parameters through a trust region algorithm; and extracting the history that the stress three-axis degree and Rode parameters of the microstructure representative voxel model change along with equivalent strain under the periodic boundary condition, so as to fit fracture model parameters through a trust region algorithm. Compared with the prior art, a virtual experiment is used for replacing a traditional mechanical experiment, so that the research and development period of a metal material product is shortened, and waste of manpower, material resources and financial resources is reduced.

Description

technical field [0001] The invention relates to the technical field of metal material performance experiments, in particular to a virtual experiment method and device for anisotropic mechanical behavior of metal materials. Background technique [0002] With the development of human civilization, materials are constantly being updated and iterated. In recent years, in order to meet the needs of energy conservation and environmental protection, lightweight and high-strength metals and alloy materials represented by aluminum alloys, magnesium alloys, titanium alloys and advanced high-strength steels have been adopted. Widely used in industrial production and manufacturing. In order to improve the production success rate of metal materials, avoid material waste, and reduce product development cycle and other requirements, numerical simulation technology based on finite element method is widely used in the field of material forming to escort forming process design and product man...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a virtual experiment method and device for the anisotropic mechanical behavior of metal materials in order to overcome the above-mentioned prior art that requires a large number of mechanical experiments to test the mechanical properties of metal materials, high cost and long product production cycle

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