An analytical study of the plasticity of sandwich honeycomb panels subjected to low-velocity impact
An analytical study of the plasticity of sandwich honeycomb panels subjected to low-velocity impact
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DOI：
10.1016/j.compositesb.2018.12.071
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发表时间：
2019-07
期刊：
影响因子：
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通讯作者：
Mengqian Sun;D. Wowk;C. Mechefske;I. Kim
中科院分区：
文献类型：
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作者：
Mengqian Sun;D. Wowk;C. Mechefske;I. Kim
利用哈密顿原理，提出了一种研究金属面板蜂窝夹层板低速冲击响应的新的解析建模方法。将哈密顿原理从弹性体推广到具有塑性的平板，提出了修正的拉格朗日函数。通过将能量转换历史与已发表的数据进行比较，证明了系统内部的物理机制是合理的。根据蜂窝夹层板低速冲击损伤的严重程度，本研究通过引入弹性变形的能量吸收或塑性变形的能量耗散，促进了对面层塑性在蜂窝夹层板低速冲击响应中的作用的理解。将预测的最大挠度和撞击力历史与已发表的实验和有限元结果进行了比较，得到了最大凹陷深度的上下限。
A new analytical modelling method for the study of low-velocity impact response in honeycomb sandwich panels with metallic face-sheets is proposed by using Hamilton's principle. A modified Lagrange's function for this model is then proposed by extending the application of Hamilton's principle from elastic bodies to face-sheets with plasticity. The internal physical mechanism in the system is proved to be reasonable by comparing the energy converting history with published data. This study advances the understanding of the role of face-sheet plasticity in low-velocity impact response of honeycomb sandwich panels by having the ability to incorporate either the energy absorption from elastic deformation or the energy dissipation from plastic deformation of the face-sheet depending on the severity of the damage state in the dented region. The predicted maximum deflection and impact force history are compared with published experimental and finite element results, and lower and upper bounds of the maximum dent depth are obtained.