Global Stiffness Structural Optimization for 3D Printing Under Unknown Loads

	Global Stiffness Structural Optimization for 3D Printing Under Unknown Loads
	Wang,Y. Tuanfeng; Liu, Yuan; Liu, Xuefeng; Yang, Zhouwang; Yan, Dong-Ming; Liu, Ligang
发表期刊	Journal of Computer Graphics Techniques
	2016
卷号	5 期号:3 页码:18-38
摘要	; The importance of the stiffness of a 3D printed object has only been realized gradually over the years. 3D printed objects are always hollow with interior structure to make the fabrication process cost-effective while maintaining stiffness. State-of-the-art techniques are either redundant (using much more material than necessary to ensure the stiffness in any case) oroptimize the structure under one of the most-probable load distributions, which may fall short in other distribution cases. Furthermore, unlike industrial products using brittle materials such as metal, cement, etc., where stress plays a very important role in structural analysis, materials used in 3D printing such as ABS, Nylon, resin, etc. are rather elastic (flexible). When considering structural problems of 3D printed objects, large-scale deformation always comes before reaching stress limits when loads are applied. We propose a novel approach for designing the interior of an object by optimizing the global stiffness — minimizing the maximum deformation under any possible load distribution. The basic idea is to maximize the smallest eigenvalue of the stiffness matrix. More specifically, we first simulate the object as a lightweight frame structure, and optimize both the size and the geometry using an eigen-mode-like formulation, interleaved with a topology clean. A postprocess is applied to generate the final object based on the optimized frame structure. The proposed method does not require specific load cases and material strengths as inputs, which the existing methods require. The results obtained from our experiments show that optimizing the interior structure under unknown loads automatically keeps strength where the structure is the weakest and is proven to be a powerful and reasonable design framework.
关键词	3d Printing
文献类型	期刊论文
条目标识符	http://ir.ia.ac.cn/handle/173211/13998
专题	多模态人工智能系统全国重点实验室_多媒体计算
推荐引用方式 GB/T 7714	Wang,Y. Tuanfeng,Liu, Yuan,Liu, Xuefeng,et al. Global Stiffness Structural Optimization for 3D Printing Under Unknown Loads[J]. Journal of Computer Graphics Techniques,2016,5(3):18-38.
APA	Wang,Y. Tuanfeng,Liu, Yuan,Liu, Xuefeng,Yang, Zhouwang,Yan, Dong-Ming,&Liu, Ligang.(2016).Global Stiffness Structural Optimization for 3D Printing Under Unknown Loads.Journal of Computer Graphics Techniques,5(3),18-38.
MLA	Wang,Y. Tuanfeng,et al."Global Stiffness Structural Optimization for 3D Printing Under Unknown Loads".Journal of Computer Graphics Techniques 5.3(2016):18-38.

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