Computational and experimental study of performance of an artificial ligament: Dacron™ yarn

Tai Ming Chu, Miroslaw Sokol, Ian S. Fischer

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The success rate of reconstructing the Anterior Cruciate Ligament (ACL) with prosthetic ligaments is currently low both in humans and animals. The stress distribution in prosthetic ligaments that causes failure is very complex and not yet understood. Therefore, we have begun to develop a Finite Element Model of a prosthetic ACL. Here we describe the normal and contact stresses in Dacron™ yarn (a multi-fibrillar structure) using input data based on experimental measurements of the load and strain of six designed yarns. The results show that the normal and contact stresses in the fibres of the ACL yarn are directly proportional to the yam strains. Increasing the twisting length (transverse deformation) of the yarn increases the normal stress in the fibres and the yarn modulus, but decreases the contact stresses between the fibres. The structural properties of a yarn are dependent on the specific arrangement of various filament types. Increasing the distance between the longitudinal (symmetry) axes of the filaments and the axis of symmetry of the yarn decreases the stresses.

Original languageEnglish (US)
Pages (from-to)309-319
Number of pages11
JournalComputer Methods in Biomechanics and Biomedical Engineering
Volume3
Issue number4
DOIs
StatePublished - Dec 1 2000

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Biomedical Engineering
  • Human-Computer Interaction
  • Computer Science Applications

Keywords

  • Anterior cruciate ligament (ACL)
  • Filament
  • Finite element analysis (FEA)
  • Stress and strain
  • Yarn

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