Van Loocke M, Lyons CG, Simms CK, Viscoelastic properties of passive skeletal muscle in compression: cyclic behaviour, Journal of Biomechanics, 42, 8, 2009, 1038-1048
Journal of Biomechanics; 42; 8;
The compressive properties of skeletal muscle are important in impact biomechanics, rehabilitation
engineering and surgical simulation. However, the mechanical behaviour of muscle tissue in
compression remains poorly characterised. In this paper, the time-dependent properties of passive
skeletal muscle were investigated using a combined experimental and theoretical approach. Uniaxial
ramp and hold compression tests were performed in vitro on fresh porcine skeletal muscle at various
rates and orientations of the tissue fibres. Results show that above a very small compression rate, the
viscoelastic component plays a significant role in muscle mechanical properties; it represents
approximately 50% of the total stress reached at a compression rate of 0.5%s-1. A stiffening effect with
compression rate is observed especially in directions closer to the muscle fibres. Skeletal muscle
viscoelastic behaviour is thus dependent on compression rate and fibre orientation.
A model is proposed to represent the observed experimental behaviour which is based on the
quasi-linear viscoelasticity framework. A previously developed Strain dependent Young’s Moduli
formulation was extended with Prony series to account for the tissue viscoelastic properties. Parameters
of the model were obtained by fitting to stress-relaxation data obtained in the muscle fibre, cross-fibre
and 45° directions. The model then successfully predicted stress-relaxation behaviour at 60° from the
fibre direction (errors < 25%). Simultaneous fitting to data obtained at compression rates of 0.5, 1 and
10%s-1 was performed and the model provided a good fit to the data as well as good predictions of
muscle behaviour at rates of 0.05 and 5%s-1 (errors < 25%).
Please note: There is a known bug in some browsers that causes an
error when a user tries to view large pdf file within the browser window.
If you receive the message "The file is damaged and could not be
repaired", please try one of the solutions linked below based on the
browser you are using.
Items in TARA are protected by copyright, with all rights reserved, unless otherwise indicated.