Anti-loosening performance of coatings on fasteners subjected to dynamic shear load
Abstract This paper investigates the self-loosening of threaded fasteners subjected to dynamic shear load. Three kinds of typical coatings, PTFE, MoS2, and TiN applied to bolts and nuts, are tested in this investigation. The study experimentally examines the loosening mechanisms of fasteners and ass...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2017-07-01
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| Series: | Friction |
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| Online Access: | http://link.springer.com/article/10.1007/s40544-017-0160-z |
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| _version_ | 1850198424537792512 |
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| author | Junbo Zhou Jianhua Liu Huajiang Ouyang Zhenbing Cai Jinfang Peng Minhao Zhu |
| author_facet | Junbo Zhou Jianhua Liu Huajiang Ouyang Zhenbing Cai Jinfang Peng Minhao Zhu |
| author_sort | Junbo Zhou |
| collection | DOAJ |
| description | Abstract This paper investigates the self-loosening of threaded fasteners subjected to dynamic shear load. Three kinds of typical coatings, PTFE, MoS2, and TiN applied to bolts and nuts, are tested in this investigation. The study experimentally examines the loosening mechanisms of fasteners and assesses the anti-loosening performance of the three tested coatings based on their tightening characteristics, loosening curves, and the damage of thread surface. Additionally, the anti-loosening performance of the three coatings is compared under different load forms. The results indicate that the PTFE and MoS2 coatings have significant anti-loosening effect, whereas the anti-loosening performance of TiN coating is not satisfactory. It is also found that an appropriate increase of the initial tightening torque can significantly improve the anti-loosening effect. In addition, the microscopic analyses of PTFE and MoS2 coating reveal that a reduced initial tightening torque leads to fretting wear on the thread contact surfaces of fasteners, thereby aggravating the damage. |
| format | Article |
| id | doaj-art-923baec90bd5405b8184ef09064fbb43 |
| institution | OA Journals |
| issn | 2223-7690 2223-7704 |
| language | English |
| publishDate | 2017-07-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Friction |
| spelling | doaj-art-923baec90bd5405b8184ef09064fbb432025-08-20T02:12:53ZengTsinghua University PressFriction2223-76902223-77042017-07-0161324610.1007/s40544-017-0160-zAnti-loosening performance of coatings on fasteners subjected to dynamic shear loadJunbo Zhou0Jianhua Liu1Huajiang Ouyang2Zhenbing Cai3Jinfang Peng4Minhao Zhu5Tribology Research Institute, Southwest Jiaotong UniversityTribology Research Institute, Southwest Jiaotong UniversitySchool of Engineering, University of LiverpoolTribology Research Institute, Southwest Jiaotong UniversityTribology Research Institute, Southwest Jiaotong UniversityTribology Research Institute, Southwest Jiaotong UniversityAbstract This paper investigates the self-loosening of threaded fasteners subjected to dynamic shear load. Three kinds of typical coatings, PTFE, MoS2, and TiN applied to bolts and nuts, are tested in this investigation. The study experimentally examines the loosening mechanisms of fasteners and assesses the anti-loosening performance of the three tested coatings based on their tightening characteristics, loosening curves, and the damage of thread surface. Additionally, the anti-loosening performance of the three coatings is compared under different load forms. The results indicate that the PTFE and MoS2 coatings have significant anti-loosening effect, whereas the anti-loosening performance of TiN coating is not satisfactory. It is also found that an appropriate increase of the initial tightening torque can significantly improve the anti-loosening effect. In addition, the microscopic analyses of PTFE and MoS2 coating reveal that a reduced initial tightening torque leads to fretting wear on the thread contact surfaces of fasteners, thereby aggravating the damage.http://link.springer.com/article/10.1007/s40544-017-0160-zbolted fastenerloosening curvefrettingcoatingdynamic shear load |
| spellingShingle | Junbo Zhou Jianhua Liu Huajiang Ouyang Zhenbing Cai Jinfang Peng Minhao Zhu Anti-loosening performance of coatings on fasteners subjected to dynamic shear load Friction bolted fastener loosening curve fretting coating dynamic shear load |
| title | Anti-loosening performance of coatings on fasteners subjected to dynamic shear load |
| title_full | Anti-loosening performance of coatings on fasteners subjected to dynamic shear load |
| title_fullStr | Anti-loosening performance of coatings on fasteners subjected to dynamic shear load |
| title_full_unstemmed | Anti-loosening performance of coatings on fasteners subjected to dynamic shear load |
| title_short | Anti-loosening performance of coatings on fasteners subjected to dynamic shear load |
| title_sort | anti loosening performance of coatings on fasteners subjected to dynamic shear load |
| topic | bolted fastener loosening curve fretting coating dynamic shear load |
| url | http://link.springer.com/article/10.1007/s40544-017-0160-z |
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