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| Influence of Preload in Bolt on Stress Wave under Impact-load |
| Received:March 31, 2021 Revised:April 01, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2021.05.017 |
| KeyWord:impact bolt preload stress wave |
| Author | Institution |
| YANG Pu |
Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang , China;Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang , China |
| XIE Ruo-ze |
Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang , China;Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang , China |
| CHEN Gang |
Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang , China;Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang , China |
| CHEN Cheng-jun |
Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang , China;Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang , China |
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| Abstract: |
| This paper aims to study the effect of preload in bolt on stress wave under tensile impact load. We have considered three cases involving bolt elastic deformation, plastic deformation and impact failure. Impact numerical simulation is carried out with bolt no-preload or under different preloads. Strain of measuring point and bolt response of connection structure are compared, and the results are also compared with those of Hopkinson tensile test. When bolts reach fracture or plastic deformation, the preload has little effect on the strain of the measuring point and the maximum stress of the bolt; when bolt is elastically deformed, the preload has some effect on the strain of the measuring point and the maximum stress of the bolt.When bolts reach fracture or plastic deformation, the tensile deformation of bolts is much larger than that of the preload deformation, and the influence of the pretension force can be neglected; when bolt is elastically deformed, since the tension deformation of bolts is close to that of the preload deformation, the influence of the preload can’t be neglected and the bolt deformation increases with the increase of preloads. |
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