Abstract
In this paper experimental and numerical finite elements fatigue crack propagation analysis of the single-side repaired thin aluminium panels containing an initial inclined flaw of 45° are studied. These panels are repaired with the 4 layers glass/epoxy composite materials with the lay-up configurations of [90]4, [105]4, [-45]4, [-45/+45]2, and [902/02]. In the performed three dimensional analyses it was assumed that the crack-front remains perpendicular to the panels’ surfaces during its propagation. The effects of the patch lay-up configurations on the crack trajectories at patched and un-patched surfaces of the panels are presented. It will be shown that crack trajectories at patched surface is different from the un-patched surface and therefore leads to the existence of a three dimensional fatigue-fracture surface for all repaired panels. A typical fracture surface is shown in Figure 1-(a). Figure 1-(b) compare the typical crack trajectories of un-patched surface of the repaired panel with the patch layup of [-45]4 obtained from experiment with that obtained from finite elements analyses. The finite elements results show a comparable agreement with those obtained from the experiments. The finite elements results also show that using various lay-up configurations may lead to various crack propagation orientation with 5° to 10° differences.
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© 2006 Springer
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Hosseini-Toudeshky, H., Mohammadi, B., Bakhshandeh, S. (2006). Fatigue Crack Trajectory Analysis of Single-Side Repaired Thin Aluminum Panels with Various Composite Patch Lay-up Configurations. In: Motasoares, C.A., et al. III European Conference on Computational Mechanics. Springer, Dordrecht. https://doi.org/10.1007/1-4020-5370-3_429
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DOI: https://doi.org/10.1007/1-4020-5370-3_429
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-4994-1
Online ISBN: 978-1-4020-5370-2
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