TY - JOUR
T1 - A modified normal contact stiffness model considering effect of surface topography
AU - Zhao, Bin
AU - Zhang, Song
AU - Man, Jia
AU - Zhang, Qing
AU - Chen, Yan
N1 - Publisher Copyright:
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PY - 2015/6/3
Y1 - 2015/6/3
N2 - The contact stiffness of joint surfaces is an important factor influencing the static and dynamic characteristics of the mechanical equipment. In the present research, a modified normal contact stiffness model of two rough surfaces is proposed. First, the stiffness model of a single asperity contact pair is obtained based on shoulder-shoulder contact in conjunction with the elastic-plastic contact model proposed by Jackson and Green. Second, the topographies of contact surfaces are analyzed, and the locations of asperities and the statistical distributions of asperity heights and radii are acquired experimentally. The asperities are then generated using Monte Carlo method with the information to simulate the real contact. Finally, the asperities contact state is determined and if the contact occurs, the stiffness of the single asperity pair is calculated and summed as the total normal stiffness of two contact surfaces. The proposed stiffness model is validated by experiments with the errors less than 10%.
AB - The contact stiffness of joint surfaces is an important factor influencing the static and dynamic characteristics of the mechanical equipment. In the present research, a modified normal contact stiffness model of two rough surfaces is proposed. First, the stiffness model of a single asperity contact pair is obtained based on shoulder-shoulder contact in conjunction with the elastic-plastic contact model proposed by Jackson and Green. Second, the topographies of contact surfaces are analyzed, and the locations of asperities and the statistical distributions of asperity heights and radii are acquired experimentally. The asperities are then generated using Monte Carlo method with the information to simulate the real contact. Finally, the asperities contact state is determined and if the contact occurs, the stiffness of the single asperity pair is calculated and summed as the total normal stiffness of two contact surfaces. The proposed stiffness model is validated by experiments with the errors less than 10%.
KW - Joint surface
KW - elastic-plastic contact
KW - normal stiffness
KW - shoulder-shoulder contact
KW - surface topography
UR - http://www.scopus.com/inward/record.url?scp=84930396244&partnerID=8YFLogxK
U2 - 10.1177/1350650114558099
DO - 10.1177/1350650114558099
M3 - Article
AN - SCOPUS:84930396244
SN - 1350-6501
VL - 229
SP - 677
EP - 688
JO - Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
JF - Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
IS - 6
ER -