Geometric and biomechanical analysis for computer-aided design of assistive medical devices

Taeseung D. Yoo, Eunyoung Kim, Junghyun Han, Daniel K. Bogen

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


This paper presents geometric and biomechanical analysis for designing elastic braces used to restrict the motion of injured joints. Towards the ultimate goal of the brace research, which is to design custom-made braces of the stiffness prescribed by a physician, this paper presents an analysis of the relationship between the brace geometry/dimension and its stiffness. As input, physician-prescribed brace stiffness and 3D-scanned data of the injured joint are given. The 3D joint geometry determines the tentative dimension of the brace. When the joint is bent, the brace stuck onto it is accordingly deformed through an appropriately devised deformation model. As a result of the deformation, strain energy is stored in the brace material. The strain energy is calculated using strain energy density functions. For effective calculation, mesh simplification and surface parametrization techniques are innovatively applied, which have been widely investigated in the computer graphics field. The calculated strain energy leads to the brace stiffness, and the obtained relationship between the brace dimension and stiffness can be used for designing a custom-made brace that meets the stiffness prescribed by a physician. The experiment results prove that geometric and biomechanical analysis works quite well for computer-aided design of assistive medical devices.

Original languageEnglish
Pages (from-to)1521-1532
Number of pages12
JournalCAD Computer Aided Design
Issue number14
Publication statusPublished - 2005 Dec

Bibliographical note

Funding Information:
This paper was performed for the Intelligent Robotics Development Program, one of the 21st Century Frontier R&D programs funded by the Ministry of Commerce, Industry and Energy of Korea. This work is partly supported by the science and technology program of Gyeonggi province.

Copyright 2013 Elsevier B.V., All rights reserved.


  • Assisitve medical device design
  • Biomechanics
  • Mesh simplification
  • Strain energy
  • Strain energy density function
  • Surface parametrization

ASJC Scopus subject areas

  • Computer Science Applications
  • Computer Graphics and Computer-Aided Design
  • Industrial and Manufacturing Engineering


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