Document Int. J. Simul. Multidisci. Des. Optim. 2, 1-9 (2008)
DOI: 10.1051/smdo:2008001
Reliability approach for fibre-reinforced composites design
H. Dehmous1, 2, Hélène Welemane1, Moussa Karama1 and Kamel Aît Tahar21 Laboratory of Engineering Production, National Engineers School of Tarbes, 47 Avenue d'Azereix, BP 1629, 65016 Tarbes, France
2 Laboratory of Mechanics and Structures, University of Tizi-Ouzou, Algeria
(Received 8 March 2007, accepted 28 January 2008; published online16 May 2008)
Abstract
This study aims at investigating the mechanical reliability of
unidirectional fibre-reinforced composites in view of their design
optimization. Owing to the manufacturing process, many uncertainties affect
inherently the properties of these materials. Besides, the brittle character
of the fibre failure leads to important safety factors that limit their
development for engineering applications. The objective is to get a
realistic evaluation of the mechanical reliability of such structures which
accounts for the various uncertainties involved. The effects of random
design parameters on the composite failure are then investigated for
different kinds of reinforcement (nature of fibre, mono-material or hybrid
structures) with finite-element probabilistic solver PERMAS.
Key words: Composite materials -- reliability engineering -- mechanical failure -- unidirectional fibre reinforcement -- failure probability -- sensitivity analysis
Correspondence: Helene.Welemane@enit.fr
© ASMDO, EDP Sciences 2008