| Design of a continuously repeated impact method with constant amplitude based on Hopkinson bar: Principle and impact fatigue life testing | |
Zhao, Sihan1; Li, Boli1; Yuan, Kangbo2,3; Guo, Weiguo1; Li PH(李鹏辉)4; Wang, Ruifeng1 ; Yang, Jianhui1; Gao, Meng1
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| Corresponding Author | Yuan, Kangbo([email protected]) |
| Source Publication | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
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| 2024-11-01 | |
| Volume | 193Pages:13 |
| ISSN | 0734-743X |
| Abstract | 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. |
| Keyword | Impact fatigue SHPB Continuous impact Constant amplitude Strain rate effect |
| DOI | 10.1016/j.ijimpeng.2024.105038 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001266282100001 |
| WOS Keyword | CRACK-GROWTH ; DYNAMIC-RESPONSE ; BEHAVIOR ; PLATES ; STEEL ; CFRP |
| WOS Research Area | Engineering ; Mechanics |
| WOS Subject | Engineering, Mechanical ; Mechanics |
| Funding Project | 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] |
| Funding Organization | National Natural Science Foundation of China |
| Classification | 一类 |
| Ranking | 3+ |
| Contributor | Yuan, Kangbo |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/95951 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Northwestern Polytech Univ, Sch Aeronaut, Xian 710072, Shaanxi, Peoples R China; 2.Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Xian 710129, Shaanxi, Peoples R China; 3.Northwestern Polytech Univ, State Key Lab Clean & Efficient Turbomachinery Pow, Xian 710129, Shaanxi, Peoples R China; 4.Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China |
| Recommended Citation 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.Rp_Au:Yuan, Kangbo |
| 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. |
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