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The International Journal of Advanced Manufacturing Technology

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26-11-2019 | ORIGINAL ARTICLE

Topology optimization of blank holders in nonisothermal stamping of magnesium alloys based on discrete loads

Authors: Yanmin Xie, Yuepeng Yue, Wei Tang, Meiqiang Feng, Yuanheng Guo, Dongtao Wang, Yun Zhu

Published in: The International Journal of Advanced Manufacturing Technology | Issue 1-2/2020

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Abstract

The structure of blank holders has a great influence on heat transfer in nonisothermal stamping of magnesium alloys. In order to improve the quality of nonisothermal stamping parts, a topology optimization method based on discrete loads is proposed, and applied to optimize blank holders. Based on the finite element model (FEM) of a cross-shaped cup in NUMISHEET2011, the one-step method is used to inverse the optimization area of the blank holder. The optimization area is rediscretized into squares. The coupled thermo-mechanical analysis is carried out based on the discretized blank holder, and the reactive forces of the discrete squares are obtained, and taken as the constraint to carry out the topology optimization of the blank holder. Based on the optimized blank holder, the plasticity difference of the blank flange can be realized by controlling the temperature on the blank flange. The nonisothermal stamping is analyzed based on the optimized blank holder. Compared with the results based on the initial blank holder, the optimization results show that the optimized blank holder can improve thickness uniformity effectively in the nonisothermal stamping of AZ31B magnesium alloy.

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Title: Topology optimization of blank holders in nonisothermal stamping of magnesium alloys based on discrete loads
Authors: Yanmin Xie
Yuepeng Yue
Wei Tang
Meiqiang Feng
Yuanheng Guo
Dongtao Wang
Yun Zhu
Publication date: 26-11-2019
Publisher: Springer London
Published in: The International Journal of Advanced Manufacturing Technology / Issue 1-2/2020
Print ISSN: 0268-3768
Electronic ISSN: 1433-3015
DOI: https://doi.org/10.1007/s00170-019-04467-7

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