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论文类型：期刊论文

发表时间：2013-11-01

发表刊物：ACM Transactions on Graphics

收录刊物：SCIE、EI、CPCI-S、Scopus

卷号：32

期号：6

ISSN号：0730-0301

关键字：3D printing; fabrication; frame structure; sparsity optimization

摘要：3D printers have become popular in recent years and enable fabrication of custom objects for home users. However, the cost of the material used in printing remains high. In this paper, we present an automatic solution to design a skin-frame structure for the purpose of reducing the material cost in printing a given 3D object. The frame structure is designed by an optimization scheme which significantly reduces material volume and is guaranteed to be physically stable, geometrically approximate, and printable. Furthermore, the number of struts is minimized by solving an l(0) sparsity optimization. We formulate it as a multi-objective programming problem and an iterative extension of the preemptive algorithm is developed to find a compromise solution. We demonstrate the applicability and practicability of our solution by printing various objects using both powder-type and extrusion-type 3D printers. Our method is shown to be more cost-effective than previous works.