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Publications
Kharghani, N., Garbatov, Y. and Guedes Soares, C. (2017), “Hotspot stress analysis of a composite T-joint accounting for geometric and surface roughness effects”, Progress in the Analysis and Design of Marine Structures, Guedes Soares, C. & Garbatov Y. (Eds.), Taylor & Francis Group, London, UK, pp. 849-858
The objective of this study is to investigate the effects of the filler and channel geometry surface roughness on the hotspot stress of an FRP sandwich T-joint subjected to a flexural load. Eighteen different T-joints, containing channels and nine without channels are analysed for three different filler materials. The first principal stress is estimated to identify the maximum hotspot stresses. For this purpose, finite element analyses are carried out. It is concluded that using the round filler with a minimum size of the radius can reduce the hotspot stress at least 20 per cent for a wide elasticity modulus range. Then, using narrow channels with only 5 mm radius on the skin surfaces (with 2/3 of the skin thickness) of the T-joint with the minimum filler radius decreases the hotspot stress about more the 24 per cent and the surface roughness of the skin increases the hotspot stress about 6 per cent.
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