Submodelling of Stress Concentrations in Helical Strand Cables within a Computational Homogenisation Framework

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Abstract

Generic helical strand cables are used in many engineering applications including overhead lines, suspension bridges and subsea mooring lines. Accurate failure prediction of these cables requires detailed assessment
of the stress concentrations at wire contact points. Finite element models of helical strands typically discretise wires into 3D solid elements. However, generating a suitably refined mesh capable of capturing stress concentrations leads to impractically large models. This paper proposes a submodelling procedure asa computationally efficient method to examine stress concentrations at wire contact points. A global model is developed first where computational homogenisation is employed to exploit the geometric periodicity of helical strands. A local finite element model of the critical contact region is subsequently constructed to determine the contact stresses. The submodel indicates stress concentrations are an order of magnitude larger than nominal wire axial stresses.

Bibliographical metadata

Original languageEnglish
Title of host publicationProceedings of the UK Association for Computational Mechanics UKACM Annual Conference 2022
EditorsJelena Ninic, Matteo Icardi, Kris van der Zee, Fangying Wang
Pages1-4
Publication statusPublished - 22 Apr 2022
EventUK Association for Computational Mechanics - Annual Conference 2022 - University of Nottingham, Nottingham, United Kingdom
Event duration: 20 Apr 202222 Apr 2022
https://www.ukacm2022.ukacm.org/

Conference

ConferenceUK Association for Computational Mechanics - Annual Conference 2022
Abbreviated titleUKACM 2022
Country/TerritoryUnited Kingdom
CityNottingham
Period20/04/2222/04/22
Internet address