Xu, He and Guedes Soares, C. (2020), “Experimental study on the dynamic response of a beam under repeated impacts”, Developments in the Collision and Grounding of Ships and Offshore Structures, C. Guedes Soares (Ed.), Taylor and Francis Group, London, pp. 131-138

In this paper, the dynamic response of a mild steel beam under repeated impacts was experimentally investigated. Repeated impacts were conducted on a drop weight machine, during which the impact mass and impact velocity were keeping constant. The impact force, velocity of the indenter, displacement, absorbed energy process were obtained. The impact process between the indenter and the specimen is illustrated. Pseudo-shakedown phenomenon was observed during the repeated impacts. When a pseudo-shakedown state is reached, the beam behaves almost the same under each subsequent impact. The maximum contact force, maximum displacement of the beam, rebound velocity of the striker, contact time, all of them reach a constant value respectively and the permanent displacement of beam will not increase further more.

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