Macromechanical finite-element simulations for predicting microstructures by experimental calibration

19th Chemnitz Seminar on Materials Engineering – 19. Werkstofftechnisches Kolloquium

Mehner, T.^1 ; Bauer, A.^2 ; Awiszus, B.^2 ; Lampke, T.^1

Institute of Materials Science and Engineering, Chemnitz University of Technology, Chemnitz

09125, Germany^1

Prof. Virtual Production Engineering, Institute for Machine Tools and Production Processes, Chemnitz University of Technology, Chemnitz

09107, Germany^2

关键词: Complex simulation;    Corrosion behaviour;    Experimental calibration;    Finite element simulations;    Forming simulations;    Geometrical dimensions;    Micro-structural;    Representative volume element (RVE);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/181/1/012036/pdf
DOI  :  10.1088/1757-899X/181/1/012036

来源: IOP

【 摘 要 】

Macromechanical simulations provide excellent opportunities for rapid calculations of forming processes. Geometrical dimensions and residual stresses can be calculated with very good agreement. More complex forming simulations (e.g. crystal dynamic simulations or calculations with representative volume elements) are necessary if microstructural magnitudes, like crystallite sizes and microstrains, have to be included. Using the example of cold-rolling, this paper aims to describe a different approach for connecting macromechanical finite-element simulations with key parameters of the microstructure. By means of X-ray diffraction and confocal microscopy, crystallite sizes, microstrains, texture and roughness values are determined and correlated to the plastic strain. The plastic strain can be simulated easily and the microstructure after forming can be predicted. As a result of this calibration, more complex simulations can be avoided. Nonetheless, these calibrated macromechanical simulations can be used for the estimation of microstructure-related properties, like the corrosion behaviour.