An experimental study on the behaviour under impact loading of metallic cellular materials
An experimental study on the behaviour under impact loading of metallic cellular materials
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DOI：
10.1016/j.ijmecsci.2004.12.012
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发表时间：
2005-04
影响因子：
7.3
通讯作者：
Han Zhao;I. Elnasri;S. Abdennadher
中科院分区：
文献类型：
--
作者：
Han Zhao;I. Elnasri;S. Abdennadher
本文对金属蜂窝材料，即不同泡孔尺寸和壁厚的铝蜂窝、由两种不同制造工艺(IFAM和Cymat)制成的泡沫铝以及空心球团聚体(镍和铁)的冲击响应进行了实验研究。直径60 mm的尼龙霍普金森压杆被用来提高信噪比，并容纳包含足够数量细胞的更大样本。进行了准静态和经典分离式霍普金森压杆试验，以及直接冲击霍普金森压杆试验(速度高达50m/S)。对于所研究的大多数细胞材料，都观察到了显著的速率敏感性。对这种宏观速率敏感性的潜在原因分析表明，连续折叠过程中的微惯性效应可能是一个重要因素。
This paper presents an experimental study on the impact response of metallic cellular materials, i.e. aluminium honeycombs of various cell sizes and wall thicknesses, aluminium foams made from two different manufacturing processes (IFAM and Cymat), as well as hollow sphere agglomerates (nickel and iron). A 60mm diameter nylon Hopkinson pressure bar is used to improve the signal/noise ratio and to host larger samples containing a sufficient number of cells. Quasi-static and classical Split Hopkinson Pressure Bar (SHPB) tests as well as direct impact Hopkinson bar tests (higher speeds up to 50m/s) are performed. Significant rate sensitivities are observed for most of the cellular materials studied. Analyses of the potential causes of this macroscopic rate sensitivity show that the microinertia effect in the successive folding process could be an important factor.