Examen de l'état de fatigue statique et dynamique d'un matériau par tomodensitométrie

Abstract

Observation by scanner of the cross section of a beam submitted to a bending moment gives evidence of a stable isodensitometric area in agreement with the concentration of stresses, as well as of a very sharp displacement of the maximum of the densitometric distribution by histogram which can be expounded as a certain heterogeneity. These phenomena exist for all materials we have studied: plexiglass, nylon, rilsan, delrin. In the case of dynamic fatigue, after 20 × 106 cycles, the comparative histogram shows a displacement more significant than in the static case and gives in this way a positive argumentation to the new use of this medical apparatus. © 1981 Dr. Dietrich Steinkopff Verlag.