Journal of Theoretical
and Applied Mechanics

37, 3, pp. 505-518, Warsaw 1999

Fatigue damage and reliability assessment of cemented hip prosthesis

Krzysztof Doliński
Continuum damage mechanics model is used in the finite element calculation of fatigue process in a cemented hip prosthesis. The cement mantle is assumed to be subjected to the fatigue damage resulting in evolution of the damage-induced material anisotropy and leading, eventually, to loosening of the prosthesis. Fatigue parameters and loads are assumed to be random variables. The reliability analysis is carried out for a linear approximation of the limit state function and, eventually, some corrections are presented to improve the fatigue lifetime probability distribution assessment.
Keywords: hip prosthesis; fatigue damage; material anisotropy; reliability