188 Computational Modelling of Biomechanics and Biotribology
relation and measured rate of energy liberation (Hill, 1964). They replace
the contractile component with a force-producing element parallel to a
force-dependent damper, which are both in series to a serial elastic element.
With this structure they obtain both the force–velocity relation and the rate
of energy liberation of the muscle.
Simplifying assumptions in the Hill-type models are that, in contrast to
the cross-bridge theory, the force exerted by the contractile element is a
xed value with respect to its contraction velocity, and that the myriad of
half-sarcomeres function as one half-sarcomere. An exception to the latter
are simulations with many Hill-type models of half-sar ...