Techno Press

Structural Engineering and Mechanics   Volume 61, Number 3, February10 2017, pages 325-334
Probability analysis of optimal design for fatigue crack of aluminium plate repaired with bonded composite patch
H. Errouane, N. Deghoul, Z. Sereir and A. Chateauneuf

Abstract     [Full Text]
    In the present study, a numerical model for probability analysis of optimal design of fatigue non-uniform crack growth behaviour of a cracked aluminium 2024 T3 plate repaired with a bonded composite patch is investigated. The proposed 3D numerical model has advanced in literatures, which gathers in a unique study: problems of reliability, optimization, fatigue, cracks and repair of plates subjected to tensile loadings. To achieve this aim, a finite element modelling is carried out to determine the evolution of the stress intensity factor at the crack tip Paris law is used to predict the fatigue life for a give n crack. To have an optimal volume of our patch satisfied the practical fatigue life, a procedure of optimization is proposed. Finally, the probabilistic analysis is performed in order to a show that optimized patch design is influenced by uncertainties related to mechanical and geometrical properties during the manufacturing process.
Key Words
    composites; fatigue; optimizations; numerical methods; structural reliability; simulation, fracture mechanics
H. Errouane, N. Deghoul, Z. Sereir :Laboratoire Structures de Composites et Materiaux innovants, Faculte de Genie Mecanique,
Universite des Sciences et de la Technologie d\'Oran, BP 1505 El M\'naouer, USTMB, Oran, Algerie
A. Chateauneuf:Clermont Universite, Blaise Pascal, EA 3867, LaMI, BP 10448, 63000 Clermont-Ferrand, France

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