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Keywords: plasticity
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Journal Articles
Article Type: Research Papers
J. Tribol. December 2019, 141(12): 121401.
Paper No: TRIB-19-1081
Published Online: September 11, 2019
... a Hertz-like analytical solution for purely elastic deformation and a semi-analytical solution based on finite element method (FEM) for elastic–plastic deformation. The asperity interaction is accounted for by discretely utilizing a modified Boussinesq solution without consideration of asperity merger...
Journal Articles
Article Type: Research-Article
J. Tribol. January 2014, 136(1): 011402.
Paper No: TRIB-13-1065
Published Online: November 26, 2013
...: James R. Barber. 18 03 2013 20 09 2013 In this investigation, a three-dimensional (3D) finite element (FE) model was developed to study subsurface initiated spalling observed in rolling line contact of tribo components such as bearings. An elastic–kinematic hardening–plastic...
Journal Articles
Article Type: Research Papers
J. Tribol. October 2011, 133(4): 041402.
Published Online: October 6, 2011
...Thibaut Chaise; Daniel Nélias What is often referred to as a Hertzian contact can undergo plasticity either at the macroscale, due to an accidental overload, or at an asperity scale, due to the presence of surface defects and/or roughness. An elastic solution does not explicitly consider...
Journal Articles
Article Type: Research Papers
J. Tribol. July 2011, 133(3): 031406.
Published Online: July 25, 2011
...H. Eid; N. Joshi; N. E. McGruer; G. G. Adams A finite element model of a layered hemisphere contacting a rigid flat, which includes the effect of adhesion, is developed. In this analysis elastic-plastic material properties were used for each of the materials comprising the layered hemisphere...
Journal Articles
Article Type: Research Papers
J. Tribol. July 2011, 133(3): 031403.
Published Online: July 7, 2011
... by the absolute surface hardness value, but instead sensitive to the sharpness of the gradient in subsurface hardness beneath the indented region. The proposed approach is not specific to case hardened steels and can be used to determine the subsurface hardness gradient for any plastically graded material (PGM...
Journal Articles
Article Type: Research Papers
J. Tribol. January 2011, 133(1): 011401.
Published Online: January 4, 2011
... the life of conductors. Treillis points around the last point of contact between the conductor and the pieces of equipment are such critical points. We observe a fully plastic contact condition at these points. Finite element results for the contact between an ellipsoid and a rigid plane and between two...
Journal Articles
Article Type: Research Papers
J. Tribol. October 2010, 132(4): 041402.
Published Online: October 1, 2010
...Raja R. Katta; Andreas A. Polycarpou A contact mechanics (CM) based model of a fixed-length rigid cylinder impacting a homogeneous elastic-plastic homogeneous body was developed and includes an improved method of estimating the residual depth after impact. The nonlinear elastic behavior during...
Journal Articles
Article Type: Research Papers
J. Tribol. October 2010, 132(4): 041401.
Published Online: September 13, 2010
...Y. Zait; V. Zolotarevsky; Y. Kligerman; I. Etsion The multiple normal loading-unloading process of an elastic-plastic sphere by a rigid flat is analyzed using finite element method for stick contact condition and both kinematic and isotropic hardening models. The behavior of the global contact...
Journal Articles
Article Type: Research Papers
J. Tribol. July 2010, 132(3): 031401.
Published Online: June 4, 2010
...L. Li; I. Etsion; F. E. Talke A model for the contact area and static friction of nominally flat rough surfaces and rough spherical surfaces is presented. The model extends previously published models, which are limited to plasticity index values below 8, to higher plasticity index values...
Journal Articles
Article Type: Review Articles
J. Tribol. April 2010, 132(2): 020801.
Published Online: April 26, 2010
... to enable an elegant quantitative solution of the basic problem of presliding between contacting bodies, may be nonphysical. An alternative approach to the same problem that is based on treating sliding inception as a failure mode involving material plastic yield is discussed. This alternative approach...
Journal Articles
Article Type: Research Papers
J. Tribol. April 2010, 132(2): 021401.
Published Online: March 11, 2010
... are in good agreement with those found in literature. Further, it is shown that the simplification of modeling a microcontact as an equivalent square uniform heat source to simplify the calculation of the maximum temperature is justified in the fully plastic regime. The partition is calculated by setting...
Journal Articles
Article Type: Research Papers
J. Tribol. October 2009, 131(4): 041402.
Published Online: September 23, 2009
... in the plastic flow regime. Shoulder-shoulder asperity contact gives rise to a slanted contact force comprising tangential and normal components. Each force component comprises elastic and plastic terms, which upon statistical summation yields the force component for the elastic and plastic forces...
Journal Articles
Article Type: Research Papers
J. Tribol. April 2009, 131(2): 021703.
Published Online: March 9, 2009
... asperities and the plastically deformed asperities, in a mixed EHL contact with either isotropic on nonisotropic roughness. The fluid-induced roughness deformation is incorporated into the probabilistic model via the use of the amplitude reduction technique. 03 05 2006 11 04 2008 09 03 2009...
Journal Articles
Article Type: Research Papers
J. Tribol. April 2009, 131(2): 021404.
Published Online: March 5, 2009
...D. Cohen; Y. Kligerman; I. Etsion A model for elastic-plastic spherical contact of rough surfaces under combined normal and tangential loadings, with full stick contact condition, is presented. The model allows evaluation of the effect of surface roughness on the real contact area, static friction...
Journal Articles
Article Type: Research Papers
J. Tribol. April 2009, 131(2): 021402.
Published Online: March 3, 2009
... by a rough surface contact. This model is based on the Boussinesq–Cerruti integral equations, which relate surface tractions to displacements. The materials are assumed to respond elastic perfectly plastically for simplicity, and the localized hardness and shear strength are set as the upper limits...
Journal Articles
Article Type: Research Papers
J. Tribol. October 2008, 130(4): 041604.
Published Online: August 7, 2008
... different plasticity models for copper: a conventional isotropic, homogeneous J 2 plasticity model and a continuum crystal plasticity model. Using crystal plasticity, the dependence of crystallographic orientation on plastic deformation and energy dissipation can be determined. The relative trends predicted...
Journal Articles
Article Type: Technical Papers
J. Tribol. October 2007, 129(4): 783–790.
Published Online: July 12, 2007
...V. Brizmer; Y. Kligerman; I. Etsion The evolution of the contact area (junction growth) of an elastic-plastic preloaded spherical contact subjected to an additional tangential loading is investigated theoretically. The normal preloading, under full stick condition, leads to the formation...
Journal Articles
Article Type: Technical Papers
J. Tribol. October 2007, 129(4): 791–800.
Published Online: June 7, 2007
...Daniel Nélias; Eduard Antaluca; Vincent Boucly The paper presents a numerical analysis of the rolling contact between an elastic ellipsoid and an elastic-plastic flat. Numerical simulations have been performed with the help of a contact solver called Plast-Kid®, with an algorithm based...
Journal Articles
Article Type: Technical Papers
J. Tribol. October 2007, 129(4): 761–771.
Published Online: May 24, 2007
...Daniel Nélias; Eduard Antaluca; Vincent Boucly; Spiridon Cretu A three-dimensional numerical model based on a semianalytical method in the framework of small strains and small displacements is presented for solving an elastic-plastic contact with surface traction. A Coulomb’s law is assumed...
Journal Articles
Article Type: Technical Papers
J. Tribol. October 2007, 129(4): 743–753.
Published Online: April 10, 2007
...Yeau-Ren Jeng; Shin-Rung Peng This study investigates the effects of asperity interactions on the mean surface separation and real contact area of rough surfaces containing elliptical asperities with Gaussian and non-Gaussian height distributions. The elastic-plastic contact behavior of surfaces...