For real engineering surfaces contact, most asperities come into contact in a configuration of shoulder-to-shoulder instead of aligned head-on. In this work, a three-dimensional (3D) model of two identical elastic–plastic spherical asperities in contact was developed which characterizes the initial contact offset with polar angle α and azimuthal angle β. The simulations with finite-element method (FEM) show that the adhesive coefficient of friction (COF) is only influenced by large initial azimuthal angle thus mainly depends on interfacial shear strength. The plowing COF is determined, however, by effective contact interference, which reflects the combined effects of α and β. Moreover, a detailed parametric study shows that the load ratio is significantly dependent on Young's modulus and interfacial shear strength, while the maximum elastic rebound force during the unloading phase is mainly dependent on polar angle.
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October 2016
Research-Article
Numerical Investigation of the Three-Dimensional Elastic–Plastic Sloped Contact Between Two Hemispheric Asperities
Xi Shi,
Xi Shi
School of Mechanical Engineering,
Shanghai Jiao Tong University,
800 Dong-chuan Road,
Shanghai 200240, China
e-mail: xishi@sjtu.edu.cn
Shanghai Jiao Tong University,
800 Dong-chuan Road,
Shanghai 200240, China
e-mail: xishi@sjtu.edu.cn
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Yunwu Zou,
Yunwu Zou
School of Mechanical Engineering,
Shanghai Jiao Tong University,
800 Dong-chuan Road,
Shanghai 200240, China
Shanghai Jiao Tong University,
800 Dong-chuan Road,
Shanghai 200240, China
Search for other works by this author on:
Huibo Fang
Huibo Fang
Shanghai Aircraft Design and Research Institute,
5188 Jinke Road,
Shanghai 201210, China
5188 Jinke Road,
Shanghai 201210, China
Search for other works by this author on:
Xi Shi
School of Mechanical Engineering,
Shanghai Jiao Tong University,
800 Dong-chuan Road,
Shanghai 200240, China
e-mail: xishi@sjtu.edu.cn
Shanghai Jiao Tong University,
800 Dong-chuan Road,
Shanghai 200240, China
e-mail: xishi@sjtu.edu.cn
Yunwu Zou
School of Mechanical Engineering,
Shanghai Jiao Tong University,
800 Dong-chuan Road,
Shanghai 200240, China
Shanghai Jiao Tong University,
800 Dong-chuan Road,
Shanghai 200240, China
Huibo Fang
Shanghai Aircraft Design and Research Institute,
5188 Jinke Road,
Shanghai 201210, China
5188 Jinke Road,
Shanghai 201210, China
1Corresponding author.
Contributed by the Applied Mechanics Division of ASME for publication in the JOURNAL OF APPLIED MECHANICS. Manuscript received April 24, 2016; final manuscript received July 8, 2016; published online August 1, 2016. Editor: Yonggang Huang.
J. Appl. Mech. Oct 2016, 83(10): 101004 (8 pages)
Published Online: August 1, 2016
Article history
Received:
April 24, 2016
Revised:
July 8, 2016
Citation
Shi, X., Zou, Y., and Fang, H. (August 1, 2016). "Numerical Investigation of the Three-Dimensional Elastic–Plastic Sloped Contact Between Two Hemispheric Asperities." ASME. J. Appl. Mech. October 2016; 83(10): 101004. https://doi.org/10.1115/1.4034121
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