The response of clamped sandwich plates with lattice cores subjected to shock loading
The response of clamped sandwich plates with lattice cores subjected to shock loading
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DOI：
10.1016/j.euromechsol.2005.08.001
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发表时间：
2006-03
影响因子：
4.1
通讯作者：
G. McShane;D. Radford;V. Deshpande;N. Fleck
中科院分区：
文献类型：
--
作者：
G. McShane;D. Radford;V. Deshpande;N. Fleck
通过在跨中加载泡沫金属弹丸，测量了等面积质量和厚度的固支圆形整体板和夹层板的动力响应。夹层板包括AISI 304不锈钢面板和AL-6XN不锈钢金字塔芯或AISI 304不锈钢方形蜂窝晶格芯。抗冲击载荷的能力由板的中跨处的永久横向挠度作为抛射体动量的函数来量化。结果表明，夹层板的抗冲击性能优于相同质量的整体板，方形蜂窝夹层板的抗冲击性能优于锥形芯板。实验的三维有限元模拟与实验测量结果吻合良好。有限元计算表明，加载时间与结构响应时间之比约为0.5。因此，测试不在于在脉冲制度，和弹丸动量单独是不足以量化的负载水平。
The dynamic response of clamped circular monolithic and sandwich plates of equal areal mass and thickness has been measured by loading the plates at mid-span with metal foam projectiles. The sandwich plates comprise AISI 304 stainless steel face sheets and either AL-6XN stainless steel pyramidal core or AISI 304 stainless steel square-honeycomb lattice core. The resistance to shock loading is quantified by the permanent transverse deflection at mid-span of the plates as a function of projectile momentum. It is found that the sandwich plates have a higher shock resistance than monolithic plates of equal mass, and the square-honeycomb sandwich plates outperform the pyramidal core plates. Three-dimensional finite element simulations of the experiments are in good agreement with the experimental measurements. The finite element calculations indicate that the ratio of loading time to structural response time is approximately 0.5. Consequently, the tests do not lie in the impulsive regime, and projectile momentum alone is insufficient to quantify the level of loading.