Complex stress state effect on fatigue life of GRP laminates.: part I, experimental

In structural applications of thin-wall, box beam constructions with composites, the effect of complex stress states is not properly taken into account in determining operational life and fatigue response in general, due either to misconceptions or lack of experimental data and theoretical models. R...

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Bibliographic Details
Published in:International journal of fatigue 2002-08, Vol.24 (8), p.813-823
Main Authors: Philippidis, Theodore P, Vassilopoulos, Anastasios P
Format: Article
Language:English
Subjects:
Applied sciences
Complex stress
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Experimental data
Fatigue strength
Fatigue, brittleness, fracture, and cracks
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Metals. Metallurgy
Physics
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Summary:In structural applications of thin-wall, box beam constructions with composites, the effect of complex stress states is not properly taken into account in determining operational life and fatigue response in general, due either to misconceptions or lack of experimental data and theoretical models. Results from a recent research project, presented here in two parts, aim to contribute to the better understanding of fatigue behaviour of GRP laminates under complex in-plane stress states. An initial estimate on the effect of neglecting shear and transverse normal stresses in fatigue life calculations is provided, based on experimental data and theoretical considerations. It is concluded that in structural GRP laminates, shear and transverse normal stresses have an important contribution in reducing operational life, irrespective of their magnitude, usually small compared to axial normal stresses.
ISSN:0142-1123
1879-3452
DOI:10.1016/S0142-1123(02)00003-8