Abstract
During navigation and operation, the marine structures may be subjected to repeated impact loadings frequently, resulting in the accumulation of the deformation and damage of the structures, which may cause serious accidents. The nonlinear finite element model is employed to study the dynamic behaviors of metal foam sandwich beam (MFSB), in which the method to achieve repeated impacts is proposed, and the results of numerical simulations are compared with those of repeated impact tests to verify the numerical method. Meanwhile, the dynamic responses and energy absorption of MFSBs are analyzed. Results show that, as the impact number increases, the deflection of face sheet increases gradually with declining increment. Meanwhile, the energy absorption of front face and metal foam decreases with the impact number, while that of the back face increases, and the energy absorption of front face is larger than that of back face and metal foam core.
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