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变形模式对多孔金属材料SHPB实验结果的影响

王鹏飞 徐松林 郑航 胡时胜

王鹏飞, 徐松林, 郑航, 胡时胜. 变形模式对多孔金属材料SHPB实验结果的影响[J]. 力学学报, 2012, 44(5): 928-932. doi: 10.6052/0459-1879-11-354
引用本文: 王鹏飞, 徐松林, 郑航, 胡时胜. 变形模式对多孔金属材料SHPB实验结果的影响[J]. 力学学报, 2012, 44(5): 928-932. doi: 10.6052/0459-1879-11-354
Wang Pengfei, Xu Songlin, Zheng Hang, Hu Shisheng. INFLUENCE OF DEFORMATION MODES ON SHPB EXPERIMENTAL RESULTS OF CELLULAR METAL[J]. Chinese Journal of Theoretical and Applied Mechanics, 2012, 44(5): 928-932. doi: 10.6052/0459-1879-11-354
Citation: Wang Pengfei, Xu Songlin, Zheng Hang, Hu Shisheng. INFLUENCE OF DEFORMATION MODES ON SHPB EXPERIMENTAL RESULTS OF CELLULAR METAL[J]. Chinese Journal of Theoretical and Applied Mechanics, 2012, 44(5): 928-932. doi: 10.6052/0459-1879-11-354

变形模式对多孔金属材料SHPB实验结果的影响

doi: 10.6052/0459-1879-11-354
基金项目: 国家自然科学基金资助项目(90916026).
详细信息
    通讯作者:

    胡时胜

  • 中图分类号: TB122

INFLUENCE OF DEFORMATION MODES ON SHPB EXPERIMENTAL RESULTS OF CELLULAR METAL

Funds: The project was supported by the National Natural Science Foundation of China (90916026).
  • 摘要: 利用两种改进后的Hopkinson杆实验分别测得多孔金属材料冲击端和支撑端的应力.实验结果及高速摄影表明,随着撞击速度的增加,试件两端的应力均匀性变差,分别对应着泡沫材料的3种变形模式:准静态模式、过渡模式、冲击模式.实验得出在冲击模式下,冲击端与支撑端的应力与试件的厚度无关,但是与试件的密度有关.在多孔金属的高应变率实验中,变形模式对SHPB实验有很大的影响,轴向惯性(波动)效应会导致试件两端的应力不均匀,此时利用SHPB得出的实验结果将会是应变率效应和惯性效应的耦合,不能真实反映材料的动态力学性能(应变率效应).

     

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  • 被引次数: 0
出版历程
  • 收稿日期:  2011-11-30
  • 修回日期:  2012-02-25
  • 刊出日期:  2012-09-18

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