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Design and Analysis of a Shell Mechanism Based Two-Fold Force Controlled Scoliosis Brace

[+] Author Affiliations
Joep P. A. Nijssen, Giuseppe Radaelli, Just L. Herder

Delft University of Technology, Delft, Netherlands

Charles J. Kim, J. B. Ring

Bucknell University, Lewisburg, PA

Paper No. DETC2017-67812, pp. V05AT08A014; 12 pages
  • ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 5A: 41st Mechanisms and Robotics Conference
  • Cleveland, Ohio, USA, August 6–9, 2017
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5817-2
  • Copyright © 2017 by ASME


In this paper a first iteration of a new scoliosis brace design and correction strategy is presented using compliant shell mechanisms to create both motion and correction. The motion profile of the human spine was found using a segmented motion capture approach. The brace was designed for a case study using a conceptual ellipsoid design approach. The force controlled correction profile was re-invented using a two fold zero and positive stiffness profile. These force generators were built and validated to prove their zero stiffness characteristic. The kinematic part of the brace was detail designed with the correct order of magnitude and validated through their force-deflection characteristic. The end result was a first iteration of a new brace validated and analysed on some critical components which can form the basis for a future biomechanical study.

Copyright © 2017 by ASME



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