Sergej Harder

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sergej.harder(at)tuhh.de

Tel: +49 (0)40 42878-4833

Room: Campus N 2031

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[108313]
Title: Influence of 90°-layer thickness on damage initiation and propagation in cfrp cross-ply laminates
Written by: Leopold, C. and Harder, S. and Buggisch, C. and Liebig, W. and Fiedler, B.
in: 17th European Conference on Composite Materials (ECCM17) 2016
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Abstract: The influence of layer thickness on failure initiation and damage propagation as matrix cracks in the 90-layers of cross-ply laminates is investigated experimentally and simulated by using FEM. Decreasing the 90-layer thickness leads to a shift of damage initiation to higher loads. The crack density and the shape of inter fibre failure also depend on the layer thickness. With increasing 90-layer thickness, the total amount of cracks decreases, whereas the amount of cracks running through the layer thickness and through the whole specimen width increases. Cracks exhibit a faster growth rate and larger crack opening with increasing layer thickness. This case is more severe for initiating delaminations. A reduction of ply thickness in cross-ply laminates increases the resistance against inter-fibre-fracture and thus offer great potential for increased fatigue lifetime.