As a matter of fact, most natural structures are complex topology structures with intricate holes or irregular surface morphology. These structures can be used as lightweight infill, porous scaffold, energy absorber or micro-reactor. With the rapid advancement of 3D printing, the complex topology structures can now be efficiently and accurately fabricated by stacking layered materials. The novel manufacturing technology and application background put forward new demands and challenges to the current design methodologies of complex topology structures. In this paper, a brief review on the development of recent complex topology structure design methods was provided; meanwhile, the limitations of existing methods and future work are also discussed in the end.

中文翻译：

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3D打印复杂拓扑结构设计方法综述


事实上，大多数自然结构都是复杂的拓扑结构，具有错综复杂的孔洞或不规则的表面形态。这些结构可用作轻质填充物、多孔支架、能量吸收器或微反应器。随着3D打印的快速发展，现在可以通过堆叠层状材料来高效、准确地制造复杂的拓扑结构。新颖的制造技术和应用背景对当前复杂拓扑结构的设计方法提出了新的要求和挑战。本文对近年来复杂拓扑结构设计方法的发展进行了简要回顾；同时，最后还讨论了现有方法的局限性和未来的工作。