| 中低应变率下闭孔泡沫铝动态力学性能研究 |
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| 引用本文： | 郭亚周,杨海,刘小川,何思渊,王计真.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. |
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| 作者姓名： | 郭亚周 杨海 刘小川 何思渊 王计真 |
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| 作者单位： | 1.中国飞机强度研究所结构冲击动力学航空重点试验室，西安710065;
2.东南大学材料科学与工程学院江苏省先进金属材料高金属研究重点试验室，南京211189 |
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| 基金项目： | 陕西省青年科技新星项目(2018KJXX-052);国家自然科学基金(11572087) |
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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(0.001~100s^-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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| 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 |
Dynamic mechanical properties of closed cell aluminum foam under medium and low strain rates |
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| GUO Yazhou,YANG Hai,LIU Xiaochuan,HE Siyuan,WANG Jizhen.Dynamic mechanical properties of closed cell aluminum foam under medium and low strain rates[J].Journal of Vibration and Shock,2020,39(3):282-288. |
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| Authors: | GUO Yazhou YANG Hai LIU Xiaochuan HE Siyuan WANG Jizhen |
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| Affiliation: | 1.Aviation Key Laboratory of Science and Technology on Structures Impact Dynamics, China Aircraft Strength Research Institute, Xi’an 710065, China; 2.Jiangsu Key Laboratory of advanced metallic materials, School of Material Science and Engineering, Southeast University, Nanjing 211189, China |
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| 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. |
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| Keywords: | close cell aluminum foam medium and low strain rates energy absorption characteristics strain rate effect brittle/plastic properties deformation band |
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