Strength-based topology optimization for anisotropic parts
Strength-based topology optimization for anisotropic parts
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DOI：
10.1016/j.addma.2017.11.007
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发表时间：
2018-01-01
影响因子：
11
通讯作者：
Suresh, Krishnan
中科院分区：
文献类型：
--
作者：
Mirzendehdel, Amir M.;Rankouhi, Behzad;Suresh, Krishnan
增材制造（AM）正在成为一种有前途的技术，用于制造具有成本效益的定制功能部件。设计这样的功能，即，在目标是平衡性能和材料使用的情况下，承载部件可能具有挑战性且耗时。拓扑优化（TO）是一种强大的设计方法，可以补充AM通过自动化的设计过程。然而，为了使TO成为一种有用的方法，必须仔细构建基本的数学模型。具体地，已经确定通过一些AM技术（例如熔融沉积成型（FDM））制造的部件表现出行为各向异性。这种诱导的各向异性可能对零件的功能产生负面影响，必须予以考虑。据我们所知，一个强大的TO方法来处理各向异性还没有提出。提出了一种基于强度的各向异性材料结构拓扑优化方法。更具体地说，我们提出了一个新的拓扑灵敏度公式的强度比的非齐次失效准则，如蔡武。整个文件的实施细节进行了讨论，所提出的方法的有效性证明了通过数值和实验测试。(C)2017爱思唯尔B.V.保留所有权利。
Additive manufacturing (AM) is emerging as a promising technology to fabricate cost-effective, customized functional parts. Designing such functional, i.e., load bearing, parts can be challenging and time consuming where the goal is to balance performance and material usage. Topology optimization (TO) is a powerful design method which can complement AM by automating the design process. However, for TO to be a useful methodology, the underlying mathematical model must be carefully constructed. Specifically, it is well established that parts fabricated through some AM technologies, such as fused deposition modeling (FDM), exhibit behavioral anisotropicity. This induced anisotropy can have a negative impact on functionality of the part, and must be considered. To the best of our knowledge, a robust TO method to handle anisotropy has not been proposed. In the present work, a strength-based topology optimization method for structures with anisotropic materials is presented. More specifically, we propose a new topological sensitivity formulation based on strength ratio of non-homogeneous failure criteria, such as Tsai-Wu. Implementation details are discussed throughout the paper, and the effectiveness of the proposed method is demonstrated through numerical and experimental tests. (C) 2017 Elsevier B.V. All rights reserved.