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A review of topology optimization for additive manufacturing:Status and challenges

Chinese Journal of Aeronautics 2021年第1期34卷 91-110页

作者： Jihong ZHU Han ZHOU Chuang WANG Lu ZHOU Shangqin YUAN Weihong ZHANG State IJR Center of Aerospace Design and Additive manufacturing Northwestern Poly technical UniversityXi'an 710072China MIIT Lab of Metal Additive manufacturing and Innovative Design Northwestern Polytechnical UniversityXi'an 710072China Institute of Intelligence Material and Structure Unmanned System TechnologiesNorthwestern Polytechnical UniversityXi'an 710072China

Topology optimization was developed as an advanced structural design methodology to generate innovative lightweight and high-performance configurations that are difficult to obtain with conventional *** manufacturing is an advanced manufacturing technique building asdesigned structures via layer-by-layer joining material,providing an alternative pattern for complex *** integration of topology optimization and additive manufacturing can make the most of their advantages and potentials,and has wide application prospects in modern *** article reviews the main content and applications of the research on the integration of topology optimization and additive manufacturing in recent years,including multi-scale or hierarchical structural optimization design and topology optimization considering additive manufacturing ***,some challenges of structural design approaches for additive manufacturing are discussed,such as the performance characterization and scale effects of additively manufactured lattice structures,the anisotropy and fatigue performance of additively manufactured material,and additively manufactured functionally graded material issues,*** is shown that in the research of topology optimization for additive manufacturing,the integration of material,structure,process and performance is important to pursue high-performance,multi-functional and lightweight *** article provides a reference for further related research and aerospace applications.

关键词： Additive manufacturing Aerospace applications Hierarchical structure manufacturing constraints Material feature Topology optimization

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manufacturing tolerant topology optimization

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Acta Mechanica Sinica 2009年第2期25卷 227-239页

作者： Ole Sigmund Department

In this paper we present an extension of the topology optimization method to include uncertainties during the fabrication of macro, micro and nano structures. More specifically, we consider devices that are manufactured using processes which may result in （uniformly） too thin （eroded） or too thick （dilated） structures compared to the intended topology. Examples are MEMS devices manufactured using etching processes, nano-devices manufactured using e-beam lithography or laser micro-machining and macro structures manufactured using milling processes. In the suggested robust topology optimization approach, under- and over-etching is modelled by image processing-based ＂erode＂ and ＂dilate＂ operators and the optimization problem is formulated as a worst case design problem. Applications of the method to the design of macro structures for minimum compliance and micro compliant mechanisms show that the method provides manufacturing tolerant designs with little decrease in performance. As a positive side effect the robust design formulation also eliminates the longstanding problem of one-node connected hinges in compliant mechanism design using topology optimization.

关键词： Topology optimization Robust designCompliant mechanisms manufacturing constraints

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Filters for manufacturability in design optimization of variable stiffness composites

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Chinese Journal of Aeronautics 2021年第4期34卷 153-159页

作者： Ye TIAN Yuhang HUO Tielin SHI Qi XIA State Key Laboratory of Digital manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of TechnologyDalian 116024China

In the design optimization of variable stiffness composites,manufacturing constraints imposed by the automated fiber placement technology must be *** the present paper,two filters are proposed to address this issue,and they are incorporated into the Shepard interpolation-based design optimization framework developed in our previous *** fiber angle arrangement of a composite is represented by a continuous function that interpolates fiber angles at scattered design *** filters are appointed for each design point to deal with two typical manufacturing constraints,i.e.,fiber curvature and gap/*** each design point,the sensitivity is first filtered in a rectangular region around this point,and by this means the fiber curvature is controlled;then in another rectangular region around this design point,the filtered sensitivities are averaged,and the result is used to update the corresponding design *** numerical examples are investigated,and the results show that the proposed method is effective.

关键词： Composite laminates Design optimization Fiber angle Filter manufacturing constraints

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