...Shreya Saxena; Ahmed Fardan; Rehan Ahmed Contact interactions play an important role in the tribological behavior of engineering materials. This paper develops a finite element model to investigate the contact mechanics and stress distribution of auxetic materials, i.e., materials with negative...

...Haibo Xie; Zhanjiang Wang; Na Qin; Wenhao Du; Linmao Qian An integrated finite element and artificial neural network method is used to analyze the impact of scratch process parameters on some variables related to elastoplastic deformation of titanium alloy. The elastoplastic constitutive parameters...

...Zamzam Golmohammadi; Farshid Sadeghi A coupled multibody elastic–plastic finite element (FE) model was developed to investigate the effects of surface defects, such as dents on rolling contact fatigue (RCF). The coupled Voronoi FE model was used to determine the contact pressure acting over...

...: 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...

... Voronoi tessellations wherein each cell represents a material grain and the boundaries between them constitute the weak planes in the material. Fatigue cracks initiate on the weak planes where oscillating shear stresses are the strongest. Finite element analysis is performed to determine the magnitude...

...Nick Weinzapfel; Farshid Sadeghi; Vasilios Bakolas The continuum theory of elasticity and/or homogeneously discretized finite element models have been commonly used to investigate and analyze subsurface stresses in Hertzian contacts. These approaches, however, do not effectively capture...

... the analysis through the deformation mechanics and through the contact mechanics. A hybrid finite element-finite volume computational framework is developed to solve the highly coupled governing equations. Viscoelasticity is seen to affect the leakage and friction characteristics of the seal through its...

... with hysteresis damping via the dynamic analysis. In the second procedure, a contact force model with hysteresis damping is used to estimate the joint forces. In the latter case, however, the contact pressure is estimated using a finite element method (FEM). A comparison in performance of the two models...

... systems by means of the finite element method. Next, consider the same journal-bearing with lubrication using very fine meshes; and the solid interaction friction coefficient is assumed to be 0.1 ( 16 22 23 ). The lubricant film was modeled with a uniform mesh of 2880 × 200 four-node 2D...

... ] − 1 { ∂ ϑ ( P , H ) ∂ H ⋅ ∂ H ∂ θ pitch } 25 d P d θ roll = [ ∂ ϑ ( P , H ) ∂ P ] − 1 { ∂ ϑ ( P , H ) ∂ H ⋅ ∂ H ∂ θ roll } Substituting the finite element...

...Yung-Chuan Chen; Sing-You Lee This study uses an elastic-plastic, coupled temperature-displacement finite element model to investigate the effect of rail corrugations on the wheel-rail thermal contact stress and temperature distribution during wheel braking. The finite element model assumes...

...Yun-Bo Yi A finite element method is used to solve the problem involving thermoelastodynamic instability (TEDI) in frictional sliding systems. The resulting matrix equation contains a complex eigenvalue that represents the exponential growth rate of temperature, displacement, and velocity fields...

...A. Saulot; L. Baillet This paper presents a temporal study using dynamic finite element methods of the dynamic response of a 2D mechanical model composed of a deformable rotating disk (wheel) in contact with a deformable translating body (rail) with constant Coulomb friction. Under global sliding...

...Zefeng Wen; Xuesong Jin; Yanyao Jiang A finite element analysis with the implementation of an advanced cyclic plasticity theory was conducted to study the elastic-plastic deformation under the nonsteady state rolling contact between a wheel and a rail. The consideration of nonsteady state rolling...

... finite element code PLASTD is used to reproduce transitory phenomena generated at the contact interface. This code includes contact and friction algorithms based upon a formulation which uses Lagrange multipliers. A numerical study of the dynamic response of a 2D mechanical model composed of a deformable...