Author(s)

M. Martínez-Martínez, A. Ferrand & J. Guillot

Abstract

Finite element analysis of thread stripping of a threaded assembly M. Martinez-Martinez, A. Ferrand & J. Guillot Laboratoire de Genie Mecanique de Toulouse INS AT, France. Abstract In this paper, we study the nut thread stripping of a loaded threaded assembly by using finite element modeling and a criterion of damage. The aim is to envisage the appearance of the macroscopic fissure which characterizes the beginning of stripping. We compare that result with those obtained by tests and other formulations existing in the literature. We carried out tests of stripping of threads. The threaded assembly is composed of an Ml 0 bolt and a round nut of which we will vary the height. The materials used are steel class 12.9 for the bolt, copper and the AU4G for the nuts. In this work, we considered that the material presents an irreversible damage just before the macroscopic fissure occurs. We used the expression suggested by LEMAITRE and CHABOCHE in their theory of the damage in mechanics of

Keywords