Typically, MultiBody Dynamics (MBD) simulations of the human hip use 3 degrees of freedom to represent joint constraints. Consequently, typical MBD simulations omit the important characteristic of cartilage deformation. This paper presents a novel development of a surface-to-surface contact model that allows for an improved understanding of joint mechanics during dynamic activities such as walking. The contact model uses bilateral constraints, whereby the cartilage mechanical properties are derived from Finite Element (FE) and experimental investigations. Future developments will use this new technique for modeling the hip in order to help clinicians understand how movement sequences may cause severe deformations, and so clinicians can then advise patients to avoid activities that increase the risk of wear and degeneration.

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