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National Repository of Grey Literature 4 records found  Search took 0.01 seconds. 
Stress analysis in ceramic head of the hip joint endoprosthesis under oblique load
 Fuis, Vladimír
Problem of the stress in the ceramic head of hip joint endoprosthesis pressed on the stem under oblique loading is solved in this paper. Oblique loading simulated the physiologi-cal conditions in vivo. The axis-symmetric production inaccuracies (deflection of nominal degree of taper) of the head - stem conical joint are considered. Computational modelling is realized by FEM - system ANSYS.
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Analysis of real production inaccuracies on the contact cone joint of head and stem
 Fuis, Vladimír
Ceramic head reliability evaluation is significantly influenced by the factors that can allow increasing of the ten-sile stress in analysed body. Previous study eventuates that the production inaccuracies of contact cone joint of the head and the stem can significantly increase the tensile stress and decrease the reliability of whole implant. Paper deals with the problem of measuring real cone shape deflections on the different measuring devices.
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Integral methods for the determination of fracture characteristics of general stress concentrators
 Gröger, Roman
The integral appoaches for calculation of generalized stress intensity factors (GSIF) are presented. Integral identities are derived using the Betti reciprocal theorem as a superposition of two independent solutions satisfying the sam boundary conditions. The complementary solution for computation of GSIF is assembled using the negative eigenvalues lambda. This algorithm yields a set of integral identities that allow to estimate GSIF separately for mode I and II. A quantitative comparsion of the integral approach with recently used extrapolation method is proposed in conclusion.
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Two paramether description of crack opening displacement
 Hutař, Pavel
The basic aim of this paper is to describe the influence of T-stress on a crack profile, crack tip opening displacement CTOD and crack mouth opening displacement CMOD. Different methods of determination CTOD values are discussed. Numerical analysis of specimens is made by finite element method (Ansys). These result are compared with values determinated by modified boundary layer model MBLM.
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