Abstract
In this paper, the mechanical behavior of aluminum foam sandwich plate (AFSP) subjected to repeated impact loadings is investigated. Firstly, the method to achieve repeated impacts of AFSP in the numerical simulation is proposed. Then dynamic responses obtained from repeated impact tests are compared with those of numerical simulations, and the results show good agreements. Besides, the mechanism of energy absorption of the AFSP under repeated impacts are examined. Results show that the elastic deformation energy of AFSP increases with the impact number, but the increment declines. On the contrary, the plastic deformation energy decreases with the impact number. In addition, the effects of thickness distribution of face sheets on impact resistance of AFSP under repeated impacts are investigated. It can be found that as the thickness of front face sheet increases, the peak impact force and the energy absorbed by front face sheet increase, while the deflections of front and back face sheets, the energy absorbed by back face and aluminum foam decrease.
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