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Design of a continuously repeated impact method with constant amplitude based on Hopkinson bar: Principle and impact fatigue life testing

文献类型：期刊论文

作者Zhao, Sihan4; Li, Boli4; Yuan, Kangbo2,3; Guo, Weiguo4; Li PH(李鹏辉)1; Wang, Ruifeng4; Yang, Jianhui4; Gao, Meng4
刊名INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
出版日期2024-11-01
卷号193页码:13
关键词Impact fatigue SHPB Continuous impact Constant amplitude Strain rate effect
ISSN号0734-743X
DOI10.1016/j.ijimpeng.2024.105038
通讯作者Yuan, Kangbo(kangboyuan@nwpu.edu.cn)
英文摘要The lack of reliable testing methods and standards hinders systematic research on the impact fatigue performance of materials. The aim of developing an impact fatigue test method is to generate repeated impact loads with a constant amplitude, which is difficult to achieve using various existing impact test devices. This study investigated the principles of cyclic loading-resetting and constant-amplitude loading based on the split Hopkinson pressure bar (SHPB) system, established a novel impact fatigue test device, and verified the developed method by testing the impact fatigue life of a Ti-6Al-4V alloy. Electromagnetic valves, laser sensors, and a vacuum pump were used in the developed device to launch and reset the striker bar; a servo motor and laser sensors were used to reset the loading bars and specimen, and the entire system was controlled by a programmable controller to achieve continuously repeated loading. To achieve constant-amplitude loading, the conditions required to ensure that the specimen moves away from the incident bar before the returning stress wave reloads the specimen was derived. It was found that a constant-amplitude repeated impact on the specimen could only be achieved through the precise design of the geometric configuration and material of the loading bars. This method is considerably simpler than various existing methods based on energy absorption and is more applicable to impact fatigue tests. The verification tests showed that the highest loading frequency of the device was 0.5 Hz, the loading rate exceeded 105 kN/s, and the amplitude error of the repeated impact loads did not exceed 2.45 %. Under loads with the same amplitude, the impact fatigue life of a Ti-6Al-4V alloy was considerably shorter than the non-impact (low strain rate) fatigue life, which indicates the necessity of investigating the strain rate effect on the fatigue performance of materials.
分类号一类
WOS关键词CRACK-GROWTH ; DYNAMIC-RESPONSE ; BEHAVIOR ; PLATES ; STEEL ; CFRP
资助项目National Natural Science Foundation of China[12072287] ; National Natural Science Foundation of China[12372365] ; National Natural Science Foundation of China[11872051] ; National Natural Science Foundation of China[12202149]
WOS研究方向Engineering ; Mechanics
语种英语
WOS记录号WOS:001266282100001
资助机构National Natural Science Foundation of China
其他责任者Yuan, Kangbo
源URL[http://dspace.imech.ac.cn/handle/311007/95950]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China
2.Northwestern Polytech Univ, State Key Lab Clean & Efficient Turbomachinery Pow, Xian 710129, Shaanxi, Peoples R China;
3.Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Xian 710129, Shaanxi, Peoples R China;
4.Northwestern Polytech Univ, Sch Aeronaut, Xian 710072, Shaanxi, Peoples R China;
推荐引用方式
GB/T 7714		 Zhao, Sihan,Li, Boli,Yuan, Kangbo,et al. Design of a continuously repeated impact method with constant amplitude based on Hopkinson bar: Principle and impact fatigue life testing[J]. INTERNATIONAL JOURNAL OF IMPACT ENGINEERING,2024,193:13.
APA Zhao, Sihan.,Li, Boli.,Yuan, Kangbo.,Guo, Weiguo.,李鹏辉.,...&Gao, Meng.(2024).Design of a continuously repeated impact method with constant amplitude based on Hopkinson bar: Principle and impact fatigue life testing.INTERNATIONAL JOURNAL OF IMPACT ENGINEERING,193,13.
MLA Zhao, Sihan,et al."Design of a continuously repeated impact method with constant amplitude based on Hopkinson bar: Principle and impact fatigue life testing".INTERNATIONAL JOURNAL OF IMPACT ENGINEERING 193(2024):13.

入库方式： OAI收割

来源：力学研究所

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