Experimental and numerical investigation of lattice core sandwich beams under low-velocity bending impact
Experimental and numerical investigation of lattice core sandwich beams under low-velocity bending impact
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DOI：
10.1177/1099636218761315
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发表时间：
2019-09
影响因子：
3.9
通讯作者：
Hossein Taghipoor;M. Damghani Nouri
中科院分区：
文献类型：
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作者：
Hossein Taghipoor;M. Damghani Nouri
研究了以膨胀金属板为芯材的夹层梁在横向冲击载荷作用下的性能。通过试验得到了夹层梁跨中的力-位移关系。利用ABAQUS/EXPLICT进行了数值模拟，并与实验结果进行了比较。然后，核心层的数量，细胞取向，细胞的大小，和基板的厚度的影响进行了研究。结果表明，芯层增加三倍使能量吸收（Ea）增加33.88%。此外，将厚度增加三倍使Ea增加61.33%。结果表明，单元尺寸和单元取向对Ea的影响是相互依赖的，控制着格芯夹层梁的低速冲击响应。
The performance of sandwich beams with expanded metal sheets as core was studied under transverse impact loading. Relationships between the force and displacement at the mid-span of the sandwich beams were obtained from the experiments. Numerical simulations were carried out using ABAQUS/EXPLICT and the results were thoroughly compared with the experimental results. Then, the influence of the core layer number, cell orientation, size of the cell, and thickness of the substrates was investigated. The results showed that the increase in the core layers up to three times increased the energy absorption (Ea) by 33.88%. Moreover, increasing the thickness by up to three times increased the Ea by 61.33%. It was found that effects of the cell size and cell orientation on the Ea were dependent on each other, governing the low-velocity impact response of the sandwich beams with lattice cores.