期刊
FINITE ELEMENTS IN ANALYSIS AND DESIGN
卷 111, 期 -, 页码 46-55出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.finel.2015.11.005
关键词
Micro deep drawing; Surface roughness; Size effects; Voronoi; Cup quality
资金
- Chinese Scholar Council [CSC 201206160011]
- International Postgraduate Tuition Award (IPTA) from the University of Wollongong
- Australian Research Council (ARC) Future Fellowship Project
- Japan Society for Promotion of Science (JSPS) Invitation Fellowship project
Surface roughness, compared with tiny sizes of micro products, can be relatively large and has significant influences on micro forming processes and products' quality. In this study, a voronoi finite element model that considers size effects of material was developed. Next the surface roughness information was assigned to this voronoi model through different elemental thickness distributions. Furthermore, springback simulation was conducted for the micro deep drawn circular cups. Simulation results demonstrate that the surface roughness with consideration of size effects has significant influences on the overall springback, the drawability represented by the minimum thickness and products' quality regarding thickness evenness and shape accuracy. This study also shows that the results from the new models are close to the experimental results concerning the diameter of cup mouth and the maximum drawing force. The developed model for the micro deep drawing is accurate and beneficial for the development of micro deep drawing process. (C) 2015 Elsevier B.V. All rights reserved.
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