中低应变率下闭孔泡沫铝动态力学性能研究

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摘要为探索闭孔泡沫铝的动态力学性能与吸能特性，基于万能材料试验机和高速液压伺服材料试验机在常温下分别对闭孔泡沫铝在准静态和中应变率下(0.001~100 s－1)的动态力学性能进行了测试，分析了不同应变率、不同相对密度和不同泡沫铝基体特性下闭孔泡沫铝的应力应变曲线特征和吸能特性变化。研究结果表明：中低应变率下的纯铝基体泡沫铝并不具备应变率效应，高脆性、相对密度较小的泡沫铝具备更好的吸能特性，塑性和脆性基体泡沫铝变形带分别呈现”V”形和”X”形，脆性基体泡沫铝同样不具备应变率效应

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	郭亚周1
	杨海1
	刘小川1
	何思渊2
	王计真1

关键词 ：闭孔泡沫铝, 中低应变率, 吸能特性, 应变率效应, 脆/塑特性, 变形带

Abstract：To explore dynamic mechanical properties and energy absorption characteristics of closed cell aluminum foam, based on universal material testing machines and high speed hydraulic servo material testing machines, dynamic mechanical properties of closed cell aluminum foam under quasi-static state and medium strain rate (0.001-100 s-1) were tested at room temperature to analyze features of stress-strain curves and energy absorption characteristics of closed cell aluminum foam under different strain rates, different relative densities and different foam aluminum matrix properties.The results showed that pure aluminum matrix aluminum foam under medium and low strain rates has no strain rate effect; aluminum foam with high brittleness and smaller relative density has better energy absorption characteristics; plastic and brittle matrix aluminum foam deformation bands reveal “V” and “X” shapes, respectively; brittle matrix aluminum foam also has no strain rate effect.

Key words： close cell aluminum foam medium and low strain rates energy absorption characteristics strain rate effect brittle/plastic properties deformation band

收稿日期: 2018-07-12 出版日期: 2020-01-28

引用本文:

郭亚周1，杨海1，刘小川1，何思渊2，王计真1. 中低应变率下闭孔泡沫铝动态力学性能研究[J]. 振动与冲击, 2020, 39(3): 282-288.
GUO Yazhou1, YANG Hai1, LIU Xiaochuan1, HE Siyuan2, WANG Jizhen1. Dynamic mechanical properties of closed cell aluminum foam under medium and low strain rates. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(3): 282-288.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2020/V39/I3/282

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