Informe Tecnico

OLIVA M.I.; FABIETTI, L.M.; SILVETTI S.P.; VILLAGRA O.A.; BERTORELLO, H. R.; URRETA, S. E.

2009-06-10/2009-06-26

1-5

material biocompatible

Tecnol.sanit.y curativa-Protesis

Objectives To demonstrate that the internal stress distributions and the elastic responses (displacements) of monolithic and split rings, to external stresses, are qualitatively and quantitatively different. Methodology The magnitude and sign of the radial ( rr ó ) and rcumferential ( èè ó ) components of the stress field and the resulting displacements or deformations are simulated for two special cases: rr ó ) and rcumferential ( èè ó ) components of the stress field and the resulting displacements or deformations are simulated for two special cases: a continuous and a split circular ring, submitted to external forces. As a particular example, the case of a very small isostatic radial (outwards) stress P is considered. The material parameters and the magnitude of the applied stress P used in the simulations are listed in Table 1 and the sample geometry described in Figure 1. Sample geometry Samples were uniform circular rings with the following dimensions: R_external = 6 mm R_internal = 5.4 mm Thickness = 0.3 mm Load P (radial outwards): 1MP