Analyse de l'influence de la configuration sur le comportement en statique d'un profile en T, fait de composite thermoplastique a haute resistance et fibres de carbone.

摘要

A T-joint can be formed by several manufacturing processes such as drilling, gluing, joint bars, casting, etc. The influence of the configuration of moulded T-joint by the compression of composite high-strength thermoplastic and carbon fiber is studied in order to boost its performance in mechanical resistance used in the composite structures.;Numerical simulation of T-joint and fracture-mode specimens is conducted in two steps using AnsysRTM finite element software: the first step locates and determines the load creating the initial crack; the second step describes the process of crack growth according to a failure of composite materials.;The Griffith A.A., criteria on critical strain energy release rates is applied for predicting crack growth in T-joint and in test specimens of different modules of elasticity.;Tensile tests of T-joint and fracture-mode tests of sampling specimens are conducted for characterization of composite high-strength thermoplastic and carbon fiber and for validation of numerical simulation results.;In this thesis, the numerical simulation by finite elements method of T-joint in composite high-strength thermoplastic and carbon fiber is carried out to predict the mechanism of the static rupture and to establish directives for design of structural parts in composite.;Results obtained by numerical simulation are in very good agreement in comparison with experimental results. The models in the numerical simulation developed in this thesis are recommended to conduct future studies with respect to the composite high-strength thermoplastic and carbon fiber.;Keywords: Thermoplastic, energy release rates, compliance, mode I, mode II, mixed-mode.