1 Department of Solid Mechanics, Technical University of Denmark
The internal bone adaptation of the proximal femur is considered. A three-dimensional finite element model of the proximal femur is used. The bone remodeling in this work is numerically described byan evolutionary remodeling scheme with anisotropic material parameters andtime-dependent loading. The memory of past loadings is included in themodel to account for the delay in the bone response from the loadchanges. The remodeling rate equation is derived from the structuraloptimization task of maximizing the stiffness in each time step. Additional informationscan be extracted from the optimization process; the remodelingequilibrium parameter where no apposition or resorption takes place is defined asthe element optimality conditions and the optimal design is used as aninitial design for the onset ofthe remodeling simulation. Some examples of boneadaptation resulting from load changes is given.