| 整形器对SHPB入射波形影响规律的定量研究 |
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| 引用本文： | 任文科,李汶峰,王江波,徐立志,高光发.整形器对SHPB入射波形影响规律的定量研究[J].北京理工大学学报,2021,41(9):901-910. |
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| 作者姓名： | 任文科 李汶峰 王江波 徐立志 高光发 |
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| 作者单位： | 南京理工大学机械工程学院,江苏,南京210094;南京理工大学机械工程学院,江苏,南京210094;北京理工大学爆炸科学与技术国家重点实验室,北京100080;宁波大学冲击与安全工程教育部重点实验室,浙江,宁波315211 |
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| 基金项目： | 国家自然科学基金资助项目（11772160，11472008，11802001）；爆炸科学与技术国家重点实验室基金资助项目（KFJJ18-01M）；冲击与安全工程教育部重点实验室开放基金资助项目（CJ202006） |
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| 摘 要： | 波形整形器是实现分离式霍普金森压杆（SHPB）实验恒应变率加载的重要手段之一，为研究整形器对入射波形的影响规律，本文以紫铜、黄铜、铝等软材料为研究对象，在37 mm霍普金森压杆（SHPB）设备上开展了整形器直径和厚度、撞击杆速度、长度等因素对入射波形状影响规律的实验研究，并结合数值模拟仿真研究与量纲分析，给出了入射波T1和T2拐点的量纲一应力、量纲一时间的定量表达式，T1拐点的量纲一应力σ/σ*与量纲一参数Y/σ*，（d/Db）2和h/Lb分别呈线性关系；T2拐点的量纲一时间t/t*与量纲一参数h/Lb、Y/σ*都是呈线性关系的.
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| 关 键 词： | 分离式霍普金森压杆(SHPB)实验 波形整形器 应力平衡 恒应变率 |
| 收稿时间： | 2021/3/23 0:00:00 |
Quantitative Study on Influence of Pulse Shaper on Split Hopkinson Pressure Bar (SHPB) Incident Waveform |
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| REN Wenke,LI Wenfeng,WANG Jiangbo,XU Lizhi,GAO Guangfa.Quantitative Study on Influence of Pulse Shaper on Split Hopkinson Pressure Bar (SHPB) Incident Waveform[J].Journal of Beijing Institute of Technology(Natural Science Edition),2021,41(9):901-910. |
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| Authors: | REN Wenke LI Wenfeng WANG Jiangbo XU Lizhi GAO Guangfa |
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| Institution: | 1. School of Mechanical Engineering, Nanjing University of Science and technology, Nanjing, Jiangsu 210094, China;2. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;3. Key Laboratory of Impact and Safety Engineering, Ministry of Education of China, Ningbo University, Ningbo, Zhejiang 315211, China |
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| Abstract: | The pulse shaper is one of the most important means to achieve constant strain rate loading in split Hopkinson pressure bar (SHPB) test. In order to study the influence of pulse shaper on incident waveform, this paper took copper, brass, aluminum alloy as research objects. The experimental study on the influence of the diameter and thickness of the pulse shaper, the speed and length of the impact rod on the incident waveform was carried out on the 37 mm SHPB equipment. Moreover, combined with numerical simulation and dimensional analysis, the quantitative expressions of dimensional stress and dimensional time at T1 and T2 inflection points of incident wave are given. The dimensional stress at T1 inflection point has linear relationship with dimensional parameters Y/σ*, (d/Db)2 and respectively; the dimensional time at T2 has linear relationship with dimensional parameters h/Lb and Y/σ*. |
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| Keywords: | split Hopkinson pressure bar (SHPB) test pulse shaper stress balance constant strain rate |
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