Constitutive Microstructural Modelling of Fibrous Soft Tissues

James Haughton (The University of Manchester)

ATB Frank Adams 1,

Fibrous soft tissues such as skin, tendons and ligaments are vital to the normal function of mammalian bodies. These soft tissues are complex materials: they exhibit anisotropy, nonlinearity and viscoelasticity. To the best of our understanding, a soft tissue’s microstructure – its constituents and their arrangement within the tissue – causes these complex behaviours. The microstructural modelling of soft tissues is, therefore, an important area of research into understanding the stresses and strains acting on a soft tissue, physiologically and non-physiologically (e.g. in surgery), and possibly, in the distant future, creating replacement tissues that can adequately replicate normal tissue behaviour. Consequently, we shall propose a new microstructural model of soft tissue deformation, fit the model to four experimental data sets of uniaxial tensile testing and compare the fits to two pre-existing models of soft tissue behaviour.

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