| SHPB测试中斜坡加载对应力均匀性和恒应变率的影响分析 |
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| 引用本文： | 丰平,张庆明,陈利,姚伟.SHPB测试中斜坡加载对应力均匀性和恒应变率的影响分析[J].北京理工大学学报,2010,30(5):513-516. |
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| 作者姓名： | 丰平 张庆明 陈利 姚伟 |
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| 作者单位： | 北京理工大学,爆炸科学与技术国家重点实验室,北京,100081;北京理工大学,爆炸科学与技术国家重点实验室,北京,100081;北京理工大学,爆炸科学与技术国家重点实验室,北京,100081;北京理工大学,爆炸科学与技术国家重点实验室,北京,100081 |
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| 摘 要： | 针对传统霍普金森压杆(SHPB)研究脆性材料和粘弹性材料的动态力学性能时,主要存在早期甚至整个实验过程的应力不均匀和应变率不恒定,严重影响实验结果的有效性和精确性.根据SHPB实验中应力的传播过程,分析了斜加载脉冲在加载过程中对试样应力均匀性和恒应变率的影响.计算分析和实验结果表明,斜坡越平缓,越有助于试样内部应力的均匀分布和应变率更快地趋向恒定,从而能使应力均匀状态和恒应变率状态保持更长的时间.
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| 关 键 词： | 霍普金森压杆 斜加载脉冲 应力均匀性 恒应变率 |
| 收稿时间： | 2009/1/15 0:00:00 |
Influence of Incident Pulse of Slope on Stress Uniformity and Constant Strain Rate in SHPB Test |
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| FENG Ping,ZHANG Qing-ming,CHEN Li and YAO Wei.Influence of Incident Pulse of Slope on Stress Uniformity and Constant Strain Rate in SHPB Test[J].Journal of Beijing Institute of Technology(Natural Science Edition),2010,30(5):513-516. |
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| Authors: | FENG Ping ZHANG Qing-ming CHEN Li and YAO Wei |
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| Institution: | FENG Ping,ZHANG Qing-ming,CHEN Li,YAO Wei(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China) |
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| Abstract: | Studies the dynamic mechanical properties of brittle material and viscoelastic material through traditional SHPB experiment.There are several problems about the stress uniformity and constant strain rate in the early or entire process of experiment.These problems severely affect the effectiveness and accuracy of results of experiments.Due to the above problems,the influence of incident pulse of slope on stress uniformity and constant strain rate is analyzed in detail using one-dimensional stress wave theory... |
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| Keywords: | split Hopkinson pressure bar incident pulse of slope stress uniformity constant strain-rate |
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