Dynamic response of laminated aluminum plate under falling hammer impact

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (15) : 233-243.

ZHOU Yilai1,2, ZHAO Zhenyu1,2, REN Jianwei1,2, BIAN Peng3, LU Tianjian1,2

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Abstract

As a new type of impact resistant structures, laminated metallic structures attract increasingly more attention from researchers worldwide. In order to study the effect of lamination on deformation,impact acceleration and the difference in impact resistance between a laminated plate and a monolayer plate of equal mass, their dynamic responses measured experimentally under drop-hammer impact loading were compared. Subsequently, the method of dynamic nonlinear finite elements is used to numerically simulate the drop-hammer test, with good agreement between simulation results and experimental measurements achieved. It is demonstrated that, under identical impact loading, compared with the monolayer plate, the laminated plate can greatly reduce the peak acceleration of the hammer head, thus providing a better protection to the hammer head. The maximum displacement of laminated aluminum plate is greater than that of monolayer aluminum plate of equal mass, which increases with the increase of total plate thickness (i.e., the number of laminations). For a laminated aluminum plate, its maximum displacement is significantly influenced by the interlaminar frictional coefficient, decreasing when the frictional coefficient becomes relatively large, or relatively small.
Key words: laminated aluminum plate; drop-hammer impact; dynamic response; finite element simulation

Key words

laminated aluminum plate / drop-hammer impact / dynamic response / finite element simulation

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ZHOU Yilai1,2, ZHAO Zhenyu1,2, REN Jianwei1,2, BIAN Peng3, LU Tianjian1,2. Dynamic response of laminated aluminum plate under falling hammer impact[J]. Journal of Vibration and Shock, 2022, 41(15): 233-243

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