Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2017-08-01

Journal: Conference on Shape Modeling International (SMI) Co-located with ACM Symposium on Solid and Physical Modeling (SPM) as part of the International Convention on Shape, Solid, Structure, and Physical Modeling (S3PM)

Included Journals: Scopus、CPCI-S、EI、SCIE

Volume: 66

Issue: ,SI

Page Number: 154-161

ISSN: 0097-8493

Key Words: Support-free; Lightweight structure; Frame structure; Overhanging angle

Abstract: Recently, different complex lightweight structures are designed to save printing material, while satisfying specific demands on physical and geometrical properties. However, most structures need additional interior support structures to help print, which not only damage the physical properties of the objects but also consume additional material, time, and energy.
   To handle the above problem, a sparsity optimization framework with support-free constraints is proposed in this work, to ensure the generated frame structures are support-free when manufactured with FDM printers. A struts elimination strategy is presented to avoid both inner and outer impending nodes. In addition, angles between adjacent inner struts and radii of struts are further optimized to reduce printing material while achieving a given structural strength. Extensive experimental results demonstrate the effectiveness and practicability of our algorithm. (C) 2017 Elsevier Ltd. All rights reserved.