Topology Optimization of Infill Structures for Additive Manufacturing Considering Structural Strength

被引：0
|
作者：
Wang C. [1 ]
Liu Y. [1 ]
Lu Y. [1 ]
Lai Z. [1 ]
Zhou M. [1 ]
机构：
[1] School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai
来源：
Shanghai Jiaotong Daxue Xuebao/Journal of Shanghai Jiaotong University | 2024年 / 58卷 / 03期
关键词：
additive manufacturing; infill structures strength; p-norm stress; topology optimization;
D O I：
10.16183/j.cnki.jsjtu.2022.333
中图分类号：
学科分类号：
摘要：
A topology optimization approach is proposed to design lightweight and high-strength porous infill structures for additive manufacturing. The maximum stress approximated by the p-norm function is minimized to enhance the structural strength. A local volume constraint is utilized to generate porous infill pattern. A continuation strategy on the upper bound of the local volume fraction is proposed to improve the stability of the optimization process and avoid the sharp rising of stress. An overhang constraint is utilized to make sure that the optimized infill structures are self-supporting and can support the given shell. Besides, two-field-based topology optimization formulations are used to ensure that the optimized infill structures satisfy the minimum length scale for additive manufacturing. The numerical results show that the optimized infill structures can significantly improve the structural strength compared with the optimized design of compliance minimization problem at the same weight. A compliance constraint is further imposed in the optimization model and the relation between stiffness and strength of the infill structures is also discussed. © 2024 Shanghai Jiaotong University. All rights reserved.
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页码：333 / 341
页数：8
相关论文
共 24 条
  • [1] CLAUSEN A, AAGE N, SIGMUND O., Exploiting additive manufacturing infill in topology optimization for improved buckling load, Engineering, 2, 2, pp. 250-257, (2016)
  • [2] WU J, AAGE N, WESTERMANN R, Et al., Infill optimization for additive manufacturing-approaching bone-like porous structures, IEEE Transactions on Visualization and Computer Graphics, 24, 2, pp. 1127-1140, (2018)
  • [3] BRUGGI M, DUYSINX P., Topology optimization for minimum weight with compliance and stress constraints, Structural and Multidisciplinary Optimization, 46, pp. 369-384, (2012)
  • [4] WANG M, LI L., Shape equilibrium constraint: A strategy for stress-constrained structural topology optimization, Structural and Multidisciplinary Optimization, 47, pp. 335-352, (2013)
  • [5] LEE K, AHN K, YOO J., A novel p-norm correction method for lightweight topology optimization under maximum stress constraints, Computers and Structures, 171, pp. 18-30, (2016)
  • [6] KHAN SA, SIDDIQUI BA, FAHAD M, Et al., Evaluation of the effect of infill pattern on mechanical strength of additively manufactured specimen, Materials Science Forum, 887, pp. 128-132, (2017)
  • [7] LIU Y, ZHOU M, WEI C, Et al., Topology optimization of self-supporting infill structures, Structural and Multidisciplinary Optimization, 63, pp. 2289-2304, (2021)
  • [8] QIU W, JIN P, JIN S, Et al., An evolutionary design approach to shell-infill structures, Additive Manufacturing, 34, (2020)
  • [9] GROEN J P, WU J, SIGMUND O., Homogenization-based stiffness optimization and projection of 2D coated structures with orthotropic infill, Computer Methods in Applied Mechanics and Engineering, 349, pp. 722-742, (2019)
  • [10] WADBRO E, NIU B., Multiscale design for additive manufactured structures with solid coating and periodic infill pattern, Computer Methods in Applied Mechanics and Engineering, 357, (2019)
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