| 泡沫混凝土动态力学性能及破坏形式 |
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| 引用本文： | 韩李斌 杨黎明. 泡沫混凝土动态力学性能及破坏形式[J]. 宁波大学学报(理工版), 2017, 0(1): 68-72 |
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| 作者姓名： | 韩李斌 杨黎明 |
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| 作者单位： | (宁波大学 机械工程与力学学院, 浙江 宁波 315211) |
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| 摘 要： | 采用分离式霍普金森压杆(SHPB)装置对泡沫混凝土在不同应变率下的动态力学性能及破坏形式进行研究, 并使用高速摄影机记录试件的破坏过程. 实验结果表明: 泡沫混凝土的动态极限抗压强度受密度影响, 表现出明显的应变率相关性; 低应变率下, 破坏形式以均匀压实破坏为主; 高应变率下, 破坏形式呈现为逐层塌落形式; 并且, 应力—应变曲线中存在明显的应力平台. 同时, 还讨论了高应变率下应力不均匀性对泡沫混凝土破坏模式的影响.
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| 关 键 词： | 泡沫混凝土 动态力学性能 应变率相关性 应力平台 逐层塌落 应力不均匀 |
Dynamic properties and failure types of foamed concrete |
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| HAN Li-bin,YANG Li-ming. Dynamic properties and failure types of foamed concrete[J]. Journal of Ningbo University(Natural Science and Engineering Edition), 2017, 0(1): 68-72 |
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| Authors: | HAN Li-bin YANG Li-ming |
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| Affiliation: | ( Faculty of Mechanical Engineering & Mechanics, Ningbo University, Ningbo 315211, China ) |
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| Abstract: | The dynamic properties and failure types of foamed concrete with different strain rate have been investigated using Split Hopkins Pressure Bar (SHPB). The test results show that: (1) The dynamic compressive strength of foamed concrete is strain rate-dependent. (2) The failure type of foamed concrete is characterized as layer by layer collapse which results a stress-platform in the stress-strain curves. The influence of stress nonuniformity on dynamic mechanical behaviors of foamed concrete is also discussed |
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| Keywords: | foamed concrete dynamic properties strain rate-dependent stress-platform layer collapsing stress nonuniformity |
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