On the Stiffness and Damping Characteristics of Line Contacts under Transient Elastohydrodynamic Lubrication
The elastohydrodynamic lubrication (EHL) oil film between contact interfaces acts as a spring or damper to reduce wear and vibration for frictional pairs. To analyze the dynamic behaviors of friction pairs in mechanical systems both effectively and accurately, the stiffness and damping parameters un...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-04-01
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| Series: | Lubricants |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4442/10/4/73 |
| _version_ | 1827619664502456320 |
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| author | Congcong Fang Anyuan Zhu Wei Zhou Yongdong Peng Xianghui Meng |
| author_facet | Congcong Fang Anyuan Zhu Wei Zhou Yongdong Peng Xianghui Meng |
| author_sort | Congcong Fang |
| collection | DOAJ |
| description | The elastohydrodynamic lubrication (EHL) oil film between contact interfaces acts as a spring or damper to reduce wear and vibration for frictional pairs. To analyze the dynamic behaviors of friction pairs in mechanical systems both effectively and accurately, the stiffness and damping parameters under EHL contact states are essential. The presented work develops a numerical model to investigate the EHL stiffness and damping characteristics based on the transient EHL system and elastic contact theory of line contact, in which the stiffness force is separated according to the relationship with approach distance of the contact body established in the steady process, and then the damping can be obtained. The results show that the stiffness force plays an increasingly important role over the applied load conditions while the damping effects is gradually weakened. EHL stiffness is obviously smaller than dry contact stiffness, but the discrepancy is decreasing with the increasing load. Moreover, the higher entrainment velocity, lubricant viscosity and larger curvature radii leads to smaller stiffness and damping. The elastic modulus generates little effect on dynamic characteristics when the load is light while dominates the maximum level of the contact stiffness. |
| first_indexed | 2024-03-09T10:32:17Z |
| format | Article |
| id | doaj.art-a24bfdf887984f118805dab0e750f886 |
| institution | Directory Open Access Journal |
| issn | 2075-4442 |
| language | English |
| last_indexed | 2024-03-09T10:32:17Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Lubricants |
| spelling | doaj.art-a24bfdf887984f118805dab0e750f8862023-12-01T21:10:23ZengMDPI AGLubricants2075-44422022-04-011047310.3390/lubricants10040073On the Stiffness and Damping Characteristics of Line Contacts under Transient Elastohydrodynamic LubricationCongcong Fang0Anyuan Zhu1Wei Zhou2Yongdong Peng3Xianghui Meng4Key Laboratory of Traffic Safety on Track, Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha 410075, ChinaKey Laboratory of Traffic Safety on Track, Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha 410075, ChinaKey Laboratory of Traffic Safety on Track, Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha 410075, ChinaKey Laboratory of Traffic Safety on Track, Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha 410075, ChinaSchool of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaThe elastohydrodynamic lubrication (EHL) oil film between contact interfaces acts as a spring or damper to reduce wear and vibration for frictional pairs. To analyze the dynamic behaviors of friction pairs in mechanical systems both effectively and accurately, the stiffness and damping parameters under EHL contact states are essential. The presented work develops a numerical model to investigate the EHL stiffness and damping characteristics based on the transient EHL system and elastic contact theory of line contact, in which the stiffness force is separated according to the relationship with approach distance of the contact body established in the steady process, and then the damping can be obtained. The results show that the stiffness force plays an increasingly important role over the applied load conditions while the damping effects is gradually weakened. EHL stiffness is obviously smaller than dry contact stiffness, but the discrepancy is decreasing with the increasing load. Moreover, the higher entrainment velocity, lubricant viscosity and larger curvature radii leads to smaller stiffness and damping. The elastic modulus generates little effect on dynamic characteristics when the load is light while dominates the maximum level of the contact stiffness.https://www.mdpi.com/2075-4442/10/4/73elastohydrodynamic lubricationstiffnessdampingline contact |
| spellingShingle | Congcong Fang Anyuan Zhu Wei Zhou Yongdong Peng Xianghui Meng On the Stiffness and Damping Characteristics of Line Contacts under Transient Elastohydrodynamic Lubrication Lubricants elastohydrodynamic lubrication stiffness damping line contact |
| title | On the Stiffness and Damping Characteristics of Line Contacts under Transient Elastohydrodynamic Lubrication |
| title_full | On the Stiffness and Damping Characteristics of Line Contacts under Transient Elastohydrodynamic Lubrication |
| title_fullStr | On the Stiffness and Damping Characteristics of Line Contacts under Transient Elastohydrodynamic Lubrication |
| title_full_unstemmed | On the Stiffness and Damping Characteristics of Line Contacts under Transient Elastohydrodynamic Lubrication |
| title_short | On the Stiffness and Damping Characteristics of Line Contacts under Transient Elastohydrodynamic Lubrication |
| title_sort | on the stiffness and damping characteristics of line contacts under transient elastohydrodynamic lubrication |
| topic | elastohydrodynamic lubrication stiffness damping line contact |
| url | https://www.mdpi.com/2075-4442/10/4/73 |
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