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The University of Southampton

Research project: Finite element modelling of biological connective soft tissue - application to the ligaments of the human knee

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The ligaments play an important role in knee kinematics, but modelling them accurately is highly challenging. This project addressed the issue of analytical and numerical aspects of the constitutive modelling of biological soft connective tissues.

A general theoretical framework for the modelling of strongly anisotropic continuum fibre-reinforced composites at finite strain was developed in order to provide solid theoretical bases for the formulation of a structurally-justified constitutive law describing the mechanical behaviour of ligaments. Then, a 3D incompressible transversely isotropic hyperelastic law accounting for the key features of ligaments (incompressibility, anisotropy, nonlinear material, large deformations and rotations, very small bending stiffness, presence of residual stresses) was implemented into a commercial explicit finite element environment. The incompressible transversely isotropic hyperelastic material implemented in the finite element code was properly validated against analytical solutions for homogeneous states of deformation and demonstrated robust performance

Finite element modelling

Related research groups

Bioengineering Science
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