| 摘要: |
| 采用小直径霍普金森压杆（SHPB），对3种密度的聚苯乙烯（expanded polystyrene， EPS）泡沫进行冲击测试，得到了5种应变率下的应力应变全曲线.为了比较EPS泡沫在冲击荷载和准静态加载下的不同响应，对EPS泡沫试样进行3种应变率下的准静态单轴压缩试验.探讨了泡沫密度、加载应变率对EPS泡沫应力应变行为、能量吸收性能和破坏特征的影响，应用能量吸收能力、吸能效率曲线和能量吸收图评价了其在冲击荷载下的能量吸收性能.结果表明： 泡沫初始密度和加载应变率对EPS泡沫的吸能与冲压特性具有较大影响. |
| 关键词: 聚苯乙烯泡沫 应变率 密度 压缩特性 能量吸收 |
| DOI：10.3969/j.issn.1007 9629.2013.04.014 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51174145,61179062)；教育部博士点专项资金资助项目(20120072110024)；中央高校基本科研业务费专项资金资助项目 |
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| Experimental Study on Impact Compression and Energy Absorbing Property of Expanded Polystyrene Foam |
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WANG Zhi liang1, ZHU Bin2
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1.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University,Shanghai 200092, China;2.Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
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| Abstract: |
| Impact tests on expanded polystyrene(EPS) foams of three different densities are performed by means of small diameter split Hopkinson pressure bar(SHPB). The stress strain curves under five different strain rates are obtained. Quasi static uniaxial compression tests under three different strain rates are also conducted to make a comparison between EPS foams dynamic and quasi static compression behavior. The effects of foam density and strain rate on EPS foams stress strain curve, energy absorption property and fragmentation characterization are analyzed. By using energy absorption capacity method, energy efficiency method and energy absorption diagram, energy absorption and dissipation property of EPS foam under impact loading are evaluated. The results show that the initial foam density and loading strain rate exert significant influence on the energy absorption and impact compression properties of EPS foam. |
| Key words: expanded polystyrene(EPS) foam strain rate density compression property energy absorption |
