000003448 001__ 3448
000003448 005__ 20141118153359.0
000003448 04107 $$acze
000003448 046__ $$k2006-05-15
000003448 100__ $$aFuis, V.
000003448 24500 $$aCalculation of the ceramics material parameters from the testing destructions of the heads

000003448 24630 $$n12.$$pENGINEERING MECHANICS 2006
000003448 260__ $$bInstitute of Theoretical and Applied Mechanics, AS CR, v.v.i., Prague
000003448 506__ $$arestricted
000003448 520__ $$2eng$$aThis paper deals with increasing of the computation modelling level of the reliability problem of ceramic heads of total hip joint endoprostheses. The solution to this problem was invoked by recent more frequent failures of these heads in clinical practice. Results of computational and experimental modelling have shown a substantial influence of shape deviations in the conical connection between stem and head on the initiation of ceramic head fractures. The fracture probability was evaluated step by step for various macroscopic shape deviations in the conical connection and then for microscopic shape deviations superposed on the macroscopic deviations. The solution to the problem of ceramic head reliability requires realization of two computational models: one for determination of stress states and another one for evaluation of the fracture probability. Material characteristics of ceramics used in fracture probability evaluation have been determined by a three-point-bending test till now. Within the framework of this paper is that the characteristics will be determined by destruction tests of ceramic heads and they will be used as new input data in the computational variants realized till now.

000003448 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000003448 653__ $$a

000003448 7112_ $$aENGINEERING MECHANICS 2006$$cSvratka (CZ)$$d2006-05-15 / 2006-05-18$$gEM2006
000003448 720__ $$aFuis, V.$$iNávrat, T.$$iHlavoň, P.
000003448 8560_ $$ffischerc@itam.cas.cz
000003448 8564_ $$s1048661$$uhttps://invenio.itam.cas.cz/record/3448/files/Fuis-268-PT.pdf$$y
             Original version of the author's contribution as presented on CD, , paper No. 268.
            
000003448 962__ $$r3410
000003448 980__ $$aPAPER