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Keywords: asperity
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Journal Articles
Article Type: Research Papers
J. Tribol. October 2022, 144(10): 101501.
Paper No: TRIB-21-1613
Published Online: May 3, 2022
...Shijun Wang; Lingsong Fan; Jingwei Wu; Pengyang Li A side contact model of joint is proposed, which considers the horizontal distance distribution and side contact between the asperities on the contact surfaces. The Leica DCM3D microscope is applied to collect the profile data of the grinding...
Journal Articles
Article Type: Research Papers
J. Tribol. June 2022, 144(6): 061601.
Paper No: TRIB-21-1306
Published Online: September 8, 2021
... conductivities and elastic moduli. In order to obtain the actual shape of the surface asperity, the surface shapes of contact bodies are evaluated separately. It is clarified that the asymmetric deformation of the asperities appears due to two causes. One depends on the slide-roll ratio (SRR) and the difference...
Journal Articles
Article Type: Research Papers
J. Tribol. April 2020, 142(4): 041502.
Paper No: TRIB-19-1271
Published Online: January 23, 2020
...Yuqin Wen; Jinyuan Tang; Wei Zhou; Lin Li The 3D rough surface modeling and contact analysis is a difficult problem in the study of rough surface contact. In this paper, a new method for reconstruction and contact analysis of asperities on 3D rough surfaces is proposed based on real rough surfaces...
Journal Articles
Article Type: Research Papers
J. Tribol. November 2019, 141(11): 111401.
Paper No: TRIB-19-1058
Published Online: September 11, 2019
...Shaofei Shang; Xiaoshan Cao; Zhiqiang Liu; Junping Shi In this study, the normal stiffness of elastic contact between rough surfaces with asperities following Gaussian distribution is investigated using ubiquitiform theory, developed from fractal theory. In the generalized ubiquitiformal Sierpinski...
Journal Articles
Article Type: Technical Briefs
J. Tribol. October 2009, 131(4): 044504.
Published Online: September 25, 2009
...W. Cheng; K. Farhang Approximate closed-form equations are derived for normal contact force between nominally flat rough surfaces in dry contact. The formulation is based on the asperity-level interaction in which adhesive forces between two asperities and elastic and rate-dependent forces...
Journal Articles
Article Type: Research Papers
J. Tribol. October 2009, 131(4): 041402.
Published Online: September 23, 2009
...Ali Sepehri; Kambiz Farhang Approximate closed-form equations governing the shoulder-shoulder contact of asperities are derived based on a generalization by Chang, Etsion, and Bogy. The work entails the consideration of asperity shoulder-shoulder contact in which the volume conservation is assumed...
Journal Articles
Article Type: Technical Briefs
J. Tribol. July 2009, 131(3): 034503.
Published Online: June 1, 2009
... misalignment, and thereby contact moment is derived. Through this scheme it is possible to also define elastic contribution to friction, since the half-plane tangential contact force on one side of an asperity is no longer balanced by the half-plane tangential force component on the opposite side. The elastic...
Journal Articles
Article Type: Research Papers
J. Tribol. April 2009, 131(2): 021407.
Published Online: March 6, 2009
...Andreas Goedecke; Randolf Mock A set of finite element simulations was performed to analyze the creep behavior of an elastic–perfectly plastic hemisphere in contact with a rigid flat. This study focuses on the time-dependent stress relaxation of a fully plastic asperity. Assuming a Garofalo...
Journal Articles
Article Type: Research Papers
J. Tribol. January 2008, 130(1): 011014.
Published Online: December 26, 2007
...A. Sepehri; K. Farhang A hybrid interactive/optimization technique is used to derive in approximate closed-form equations relating contact load to mean plane separation. Equations governing Hertz contact for the interaction of surface asperities are considered in which asperity shoulder-to-shoulder...
Journal Articles
Article Type: Technical Briefs
J. Tribol. October 2007, 129(4): 957–962.
Published Online: April 23, 2007
...J. Jamari; M. B. de Rooij; D. J. Schipper In this paper, a theoretical and experimental investigation is presented to study the contact behavior of the plastic contact of deterministic rough surfaces. Analyses exclude bulk deformation of the rough surface and concentrate to the contact on asperity...
Journal Articles
Article Type: Research Papers
J. Tribol. October 2006, 128(4): 876–885.
Published Online: May 3, 2006
...A. Hariri; J. W. Zu; R. Ben Mrad The asperities of rough surfaces have long been considered to be points higher than their immediate neighbors. Based on this concept, theories were developed for quantitatively understanding the elastic and plastic nature of contact between rough surfaces. Recently...
Journal Articles
Article Type: Technical Papers
J. Tribol. January 2005, 127(1): 24–29.
Published Online: February 7, 2005
...Reese E. Jones; David A. Zeigler The Greenwood and Williamson (1966) model is an elegant and often-cited paradigm for predicting the load-displacement behavior of contacting rough surfaces given the height distribution of the contacting asperities. By use of an inverse technique and available load...
Journal Articles
Article Type: Technical Papers
J. Tribol. January 2001, 123(1): 1–7.
Published Online: June 29, 2000
... that there is no chance for oil pressure to build up in the pits. Instead the rate at which the asperities can be crushed approaches the limit for unlubricated conditions. This section describes observations of MPHL during strip drawing of bright anneal strip containing Vickers or Brinell indentations. Table 3...