Mechanistic And Multiscale Predictions For Properties Of Polycrystalline Materials

Material properties very different in scale of micro-macro,Macro-theory has been generally no longer applicable in the meso-scale.In order to better understand the mechanical properties of polycrystalline materials need cross-scale study.But how the link two level phenomenon,are still problems.My mentor Professor LiXudong Put forward,the "Microstructure-structure-the structure of components" for the first time in China,and developed the "form large to small" and "from small to large" the convergence of "Multiscale" means of numerical calculation Analysis Method,the effective establishment the purpose of calculating the geometry,computer simulation, finite element numerical simulation of applied research at the core framework to build a "digital materials+Numerical materials+environment" for the integration of numerical information as the characteristics of composite materials in service performance/service behavior prediction.In this paper,based on mentor's research methods and means to carry out a practical study and development software tools,and research methods to try.This paper first introduces the tutor Professor LiXudong propose the "material microstructure Computing",followed by CAE technology that has become part of scientific research throughout the material,and plays a key role. Therefore,in the material science research finite element analysis has an important significance.Next introduced the subject relates to the software platform,software programming languages and issues involved in such file formats introduced accordingly. In this paper,experimental and computer modeling for polycrystalline materials introduced macro-meso combination of research,and macro-polycrystalline materials,a combination of meso-scale study was carried out cross-highlighting.Based on ABAQUS software,the polycrystalline material sample macro-mechanical simulation, and then use their own team software combined with ProDesign Programming and Python script in ABAQUS/CAE environment achieve the microstructure of polycrystalline materials for three-dimensional simulation,involve microstructure of polycrystalline materials of the geometric model,material parameters given the model mesh,on the basis of self-developed software for the micro-structure model Submode_BC definition of boundary conditions.Combined with the development of my own series of software programs to achieve "smallest","component parts-structure - Microstructure" research techniques.These interpolations process through the development of modules for the realization of cross-scale microstructure of polycrystalline materials the definition of boundary conditions to simulate the microstructure of the service environment.For the microstructure of polycrystalline materials "material structural weaknesses",the use of self-development of software AutoORI to explore its Crystallographic orientation of the polycrystalline microstructure of the material in "material structure weaknesses" the impact of the mechanical behavior,as well as multi-containing inclusions the organizational structure of the micro-crystal materials mechanical behavior.The next chapter based on the finite element method,the macro-mechanical properties of polycrystalline materials predicted by the known combination of single-crystal material parameters of the finite element method,the microstructure of polycrystalline materials for the process of stretching or warming up the simulation,thus polycrystalline materials has been the organizational structure of the micro-macro-mechanical response,combined with the development of program to achieve their macro-mechanical properties.