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Comparison of structural anisotropic soft tissue models for simulating Achilles tendon tensile behaviour

Khayyeri, Hanifeh LU ; Longo, Giacomo; Gustafsson, Anna LU and Isaksson, Hanna LU (2016) In Journal of the Mechanical Behavior of Biomedical Materials 61. p.431-443
Abstract

The incidence of tendon injury (tendinopathy) has increased over the past decades due to greater participation in sports and recreational activities. But little is known about the aetiology of tendon injuries because of our limited knowledge in the complex structure-function relationship in tendons. Computer models can capture the biomechanical behaviour of tendons and its structural components, which is essential for understanding the underlying mechanisms of tendon injuries. This study compares three structural constitutive material models for the Achilles tendon and discusses their application on different biomechanical simulations. The models have been previously used to describe cardiovascular tissue and articular cartilage, and... (More)

The incidence of tendon injury (tendinopathy) has increased over the past decades due to greater participation in sports and recreational activities. But little is known about the aetiology of tendon injuries because of our limited knowledge in the complex structure-function relationship in tendons. Computer models can capture the biomechanical behaviour of tendons and its structural components, which is essential for understanding the underlying mechanisms of tendon injuries. This study compares three structural constitutive material models for the Achilles tendon and discusses their application on different biomechanical simulations. The models have been previously used to describe cardiovascular tissue and articular cartilage, and one model is novel to this study. All three constitutive models captured the tensile behaviour of rat Achilles tendon (root mean square errors between models and experimental data are 0.50-0.64). They further showed that collagen fibres are the main load-bearing component and that the non-collagenous matrix plays a minor role in tension. By introducing anisotropic behaviour also in the non-fibrillar matrix, the new biphasic structural model was also able to capture fluid exudation during tension and high values of Poisson's ratio that is reported in tendon experiments.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Collagen fibre mechanics, Constitutive model, Fibre-reinforced, Poroelastic, Tendon
in
Journal of the Mechanical Behavior of Biomedical Materials
volume
61
pages
13 pages
publisher
Elsevier
external identifiers
  • scopus:84963860744
  • wos:000380080400040
ISSN
1751-6161
DOI
10.1016/j.jmbbm.2016.04.007
language
English
LU publication?
yes
id
80de24c5-3e88-4c27-bd58-ec7d8d04c1e6
date added to LUP
2016-05-10 07:27:45
date last changed
2017-01-01 08:25:35
@article{80de24c5-3e88-4c27-bd58-ec7d8d04c1e6,
  abstract     = {<p>The incidence of tendon injury (tendinopathy) has increased over the past decades due to greater participation in sports and recreational activities. But little is known about the aetiology of tendon injuries because of our limited knowledge in the complex structure-function relationship in tendons. Computer models can capture the biomechanical behaviour of tendons and its structural components, which is essential for understanding the underlying mechanisms of tendon injuries. This study compares three structural constitutive material models for the Achilles tendon and discusses their application on different biomechanical simulations. The models have been previously used to describe cardiovascular tissue and articular cartilage, and one model is novel to this study. All three constitutive models captured the tensile behaviour of rat Achilles tendon (root mean square errors between models and experimental data are 0.50-0.64). They further showed that collagen fibres are the main load-bearing component and that the non-collagenous matrix plays a minor role in tension. By introducing anisotropic behaviour also in the non-fibrillar matrix, the new biphasic structural model was also able to capture fluid exudation during tension and high values of Poisson's ratio that is reported in tendon experiments.</p>},
  author       = {Khayyeri, Hanifeh and Longo, Giacomo and Gustafsson, Anna and Isaksson, Hanna},
  issn         = {1751-6161},
  keyword      = {Collagen fibre mechanics,Constitutive model,Fibre-reinforced,Poroelastic,Tendon},
  language     = {eng},
  month        = {08},
  pages        = {431--443},
  publisher    = {Elsevier},
  series       = {Journal of the Mechanical Behavior of Biomedical Materials},
  title        = {Comparison of structural anisotropic soft tissue models for simulating Achilles tendon tensile behaviour},
  url          = {http://dx.doi.org/10.1016/j.jmbbm.2016.04.007},
  volume       = {61},
  year         = {2016},
}