A Fibril-reinforced Poromechanical Model of Articular Cartilage Undergoing Large Deformation
نویسندگان
چکیده
INTRODUCTION Fluid pressurization in articular cartilage and meniscus has been successfully modelled in recent 3D knee models. Due to computational cost and convergence difficulties, these studies were limited to small deformations. The long term goal of the current study is to investigate the fluid pressurization under physiological loading and boundary conditions. Our small deformation results suggested that the cartilaginous tissues should be modeled as fibril-reinforced porous materials. Therefore, in the present work, the quasi-linear viscoleasticity (QLV) theory is used to define the constitutive behaviour of the fibers undergoing large deformation. A user defined FORTRAN subroutine, UMAT, was incorporated in ABAQUS for this purpose.
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