220 Computational Modelling of Biomechanics and Biotribology
theory have also been tested against the results from the biphasic theory.
No signi cant difference has been found among the results obtained from
the commercial solvers of poroelastic theory, experiments and the biphasic
theory (Prendergast et al ., 1996). In another study, ABAQUS was also found
to be capable of approximating the biphasic model of cartilage (Wu et al .,
1998). It must be noted that these FE packages may not be able to account
for high strain-rate compressions.
7.3 Comparison and discussion of major theories
The main features of three commonly used categories of cartilage models
are rst brie y summarized in this section consecutively. The required fea- ...