Strength-constrainted Topology Optimization Based on Additive Manufacturing Anisotropy

被引：0
|
作者：
He Z. [1 ]
Yang D. [1 ]
Jiang C. [1 ]
Wu Y. [1 ]
Jiang H. [1 ]
机构：
[1] State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha
来源：
Zhongguo Jixie Gongcheng/China Mechanical Engineering | 2022年 / 33卷 / 19期
关键词：
additive manufacturing; anisotropic failure strength; bi-directional evolutionary structural optimization(BESO); topology optimization; Tsai-Hill failure coefficient;
D O I：
10.3969/j.issn.1004-132X.2022.19.012
中图分类号：
学科分类号：
摘要：
The particularity of additive manufacturing processes leds to the fact that the manufacturing structure exhibited anisotropic mechanics properties. In order to meet the more stringent structural strength design requirements, atopology optimization strategy considering anisotropic strength constraints was proposed based on bi-directional evolutionary structural optimization. The anisotropic Tsai-Hill failure coefficient evaluating additive structural strength was derived, and an objective function containing the constraint of failure coefficient was established by the scale factor. The sensitivity numbers were analyzed in detail, moreover, numerical methods such as sensitivity normalization were used to stabilize the optimization processes. It shows that the proposed method effectively suppresses the high failure risk area, thus, ensures the structural strength, and may obtain better results than that of von-Mesis stress-dependent design under material anisotropic strength assumption. In addition, the optimization results are deeply rely on the variation of anisotropy and the material stacking angle parameters, therefore reasonable tuning will help to optimize structural properties. © 2022 China Mechanical Engineering Magazine Office. All rights reserved.
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页码：2372 / 2380and2393
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