Login | Register

Customization and topology optimization of compression casts/braces on two-manifold surfaces

Title:

Customization and topology optimization of compression casts/braces on two-manifold surfaces

Zhang, Yunbo and Kwok, Tsz-Ho ORCID: https://orcid.org/0000-0001-7240-1426 (2019) Customization and topology optimization of compression casts/braces on two-manifold surfaces. Computer-Aided Design, 111 . pp. 113-122. ISSN 00104485

[img]
Text (application/pdf)
CAD19_SurfaceTO.pdf - Accepted Version
Restricted to Repository staff only until 24 February 2021.
Available under License Creative Commons Attribution Non-commercial No Derivatives.
6MB

Official URL: http://dx.doi.org/10.1016/j.cad.2019.02.005

Abstract

This paper applies the topology optimization (TO) technique to the design of custom compression casts/braces on two-manifold mesh surfaces. Conventional braces or casts, usually made of plaster or fiberglass, have the drawbacks of being heavy and unventilated to wear. To reduce the weight and improve the performance of a custom brace, TO methods are adopted to optimize the geometry of the brace in the three-dimensional (3D) space, but they are computationally expensive. Based on our observation that the brace has a much smaller thickness compared to other dimensions and the applied loads are normal forces, this paper presents a novel TO method based on thin plate elements on the two-dimensional manifold (2-manifold) surfaces instead of 3D solid elements. Our working pipeline starts from a 3D scan of a human body represented by a 2-manifold mesh surface, which is the base design domain for the custom brace. Similar to the concept of isoparametric representation, the 3D design domain is mapped onto a two-dimensional (2D) parametric domain. An Finite Element Analysis (FEA) with bending moments is performed on the parameterized 2D design domain, and the Solid Isotropic Material with Penalization (SIMP) method is applied to optimize the pattern in the parametric domain. After the optimized cast/brace is obtained on the 2-manifold mesh surface, a solid model is generated by our design interface and then sent to a 3D printer for fabrication. Compared with the optimization method with solid elements, our method is more efficient and controllable due to the high efficiency of solving FEA in the 2D domain.

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Mechanical, Industrial and Aerospace Engineering
Item Type:Article
Refereed:Yes
Authors:Zhang, Yunbo and Kwok, Tsz-Ho
Journal or Publication:Computer-Aided Design
Date:2019
Funders:
  • Natural Sciences & Engineering Research Council of Canada (NSERC)
Digital Object Identifier (DOI):10.1016/j.cad.2019.02.005
Keywords:Compression garment, Customization, Topology optimization, Computer-aided design
ID Code:985964
Deposited By: TSZ HO KWOK
Deposited On:11 Feb 2020 17:01
Last Modified:11 Feb 2020 17:01
All items in Spectrum are protected by copyright, with all rights reserved. The use of items is governed by Spectrum's terms of access.

Repository Staff Only: item control page

Downloads per month over past year

Research related to the current document (at the CORE website)
- Research related to the current document (at the CORE website)
Back to top Back to top