{"title":"A tribological investigation of cochlear implant electrode arrays with different wire shapes","authors":"Bilsay Sümer , Gülçin Şefiye Aşkın","doi":"10.1016/j.triboint.2025.110679","DOIUrl":null,"url":null,"abstract":"<div><div>The elasticity and frictional dynamics of a cochlear implant electrode array (EA) with different wire shapes are investigated by numerical and experimental analysis. Finite element method (FEM) analysis with varying wavelengths under large deformations indicates that the corrugated wire exhibits enhanced flexibility in both the transverse and longitudinal directions, while the buckling limit of the EA is governed by the wavelength of the wires. The friction experiments are carried out on a flat surface and an artificial cochlea model at different preloads, speeds and surface conditions, and the resulting data are analyzed using friction loops. It is found that wavy wired EA has a lower friction response and insertion force, while they are more prone to tip buckling and electrode array tip fold-over.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"209 ","pages":"Article 110679"},"PeriodicalIF":6.1000,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Tribology International","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0301679X25001744","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The elasticity and frictional dynamics of a cochlear implant electrode array (EA) with different wire shapes are investigated by numerical and experimental analysis. Finite element method (FEM) analysis with varying wavelengths under large deformations indicates that the corrugated wire exhibits enhanced flexibility in both the transverse and longitudinal directions, while the buckling limit of the EA is governed by the wavelength of the wires. The friction experiments are carried out on a flat surface and an artificial cochlea model at different preloads, speeds and surface conditions, and the resulting data are analyzed using friction loops. It is found that wavy wired EA has a lower friction response and insertion force, while they are more prone to tip buckling and electrode array tip fold-over.
期刊介绍：
Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International.
Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.
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