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Microforming Technology by Haibo Xie, Jingwei Zhao, Zhengyi Jiang

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Chapter 8

Simulation of Micro Flexible Rolling

Abstract

This chapter establishes a finite element model to numerically study the micro flexible rolling process, especially on the springback in thickness direction, where 3D Voronoi tessellation has been applied to describe grain boundary and generation process of grains in the workpiece. To reflect material heterogeneity, nine kinds of mechanical properties defined by nine types of heterogeneity coefficients are selected and assigned to Voronoi polyhedrons as per the statistical distribution of hardness of grains identified by micro hardness testing. Different initial workpiece thicknesses with different reductions are respectively considered in the numerical simulation of micro flexible rolling ...

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