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Publications
Liu, B. and Guedes Soares, C. (2015), “Experimental and numerical study on response of rectangular tubes subjected to transverse impact loadings”, Maritime Technology and Engineering, Guedes Soares, C. & Santos T.A. (Eds.), Taylor & Francis Group, London, UK, pp. 455-462
Quasi-static punching tests and dynamic drop weight impact tests have been performed to examine the plastic response and failure of clamped rectangular tubes struck transversely by a cylindrical indenter with a hemispherical nose. The laboratory results are compared with numerical simulations. Two span lengths of the tube specimens are selected: 125 and 250 mm. The tubes are impacted at the mid-span and at one-quarter span from the support. The impact scenarios could represent abnormal actions on marine structures, especially for collision and grounding on ship double-hull structures. Similar experimental plastic response and failure are obtained for the tubes loaded statically and dynamically under low impact velocity, since the used material is high tensile steel that is strain rate insensitive. The experimental results are presented in terms of the force-displacement responses and the failure modes of the tube specimens, showing a good agreement with the simulations performed by the LS-DYNA finite element solver. The numerical results manage to describe the process of initiation and propagation of the material fracture in the tube specimens and provide detailed information to analyse the large inelastic deformation and failure of ship structural components subjected to impact loading. The deformation and failure characteristics of the tube specimens are well elaborated with the combination of the classical beam and plate failure theories.
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