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Stress and reliability analyses of the hip joint endoprosthesis ceramic head with measured manufacturing inaccuracies

Fuis V.

Zeszyty Naukowe Katedry Mechaniki Stosowanej / Politechnika Śląska

2003

nr 21

51-56

The paper presents the results of the computational modelling of the stress and reliability of the ceramic head of the total hip joint endoprosthesis under ISO 7206-5 loading. Endoprosthesis consists of the two fmain parts - ceramic head and the steel stem. The joint of these two parts is realised by the self-locking cone and the manufacturing inaceuracies of these cones significantly influence the tensile stresses in the head and head's failure probability. The manufacturing inaceuracies were measured on 3D measuring devrce, stress in the analysed system is calculated using FEM system ANSYS and the head's reliability calculation is based in the Weibull weakest link theory.