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From shear centre to eigenwrenches

Stacey, Jonathan P.; O’Donnell, Matthew P.; Kim, Charles J.; Schenk, Mark


Jonathan P. Stacey

Matthew P. O’Donnell

Charles J. Kim

Mark Schenk


In the field of mechanism design, the behaviour of compliant shell mechanisms is commonly characterised via the eigenscrew decomposition of their spatial stiffness matrix. Recent developments have included the design of compliant shell mechanisms made with anisotropic materials. Conceptually, these compliant mechanisms are very similar to morphing composite structures that are typically designed using structural mechanics approaches. Eigenscrew decomposition could, therefore, provide additional insight to designers. To bridge the gap between the two communities, we present the equivalence of eigenscrews (eigenwrench and eigentwist) and familiar structural concepts such as shear centre and centre of twist for the special case of a cantilevered beam. It is hoped that this explicit link will help bridge these disparate fields, and encourage cross-fertilisation of ideas.


Stacey, J. P., O’Donnell, M. P., Kim, C. J., & Schenk, M. (2021). From shear centre to eigenwrenches. Thin-Walled Structures, 161,

Journal Article Type Article
Acceptance Date Jan 16, 2021
Online Publication Date Feb 12, 2021
Publication Date Apr 1, 2021
Deposit Date Feb 17, 2021
Publicly Available Date Feb 13, 2022
Journal Thin-Walled Structures
Print ISSN 0263-8231
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 161
Article Number 107478
Keywords Mechanical Engineering; Civil and Structural Engineering; Building and Construction
Public URL
Additional Information This article is maintained by: Elsevier; Article Title: From shear centre to eigenwrenches; Journal Title: Thin-Walled Structures; CrossRef DOI link to publisher maintained version:; Content Type: article; Copyright: © 2021 Elsevier Ltd. All rights reserved.


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