Approximating the influence coefficients of non-planar elastic solids for conformal contact analysis

Blanco-Lorenzo, Julio; Vollebregt, Edwin A. H.; Santamaría, Javier; Vadillo, E.G.

doi:10.1016/j.triboint.2020.106671

Cited by 7 publications

(2 citation statements)

References 17 publications

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“…situations where plastic deformation is a major concern [21], including thermal effects on the stresses [67], and RCF crack initiation and growth [13,68]. Another use of FE models is to build influence coefficients for conformal contact situations [69,70].…”

Section: Development Of Theories For Rolling Contactsmentioning

confidence: 99%

Challenges and progress in the understanding and modelling of the wheel–rail creep forces

Vollebregt¹,

Six

Polách³

2021

Vehicle System Dynamics

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This paper surveys advances in the understanding and modelling of wheel-rail creep forces. The main focus is placed on tribological aspects, for which significant progress was made in the past two decades. We emphasise the role played by the surface conditions, i.e. the presence of liquid and solid layers, surface roughness, and nearsurface plastic deformation. As these surface conditions may change over time, transient changes may be obtained in the creep force characteristic. This brings feedback into the picture, with consequences and opportunities for optimised adhesion recovery, traction control, and braking systems.

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Section: Development Of Theories For Rolling Contactsmentioning

confidence: 99%

Challenges and progress in the understanding and modelling of the wheel–rail creep forces

Vollebregt¹,

Six

Polách³

2021

Vehicle System Dynamics

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“…This extension is skipped here. The development of influence functions is discussed in [81,82]. 3.c' The surface tractions are defined using the local normal and tangent directions, and this is accounted for in the accumulation of the total forces and moments.…”

Section: Introducing the Curved Reference Surfacementioning

confidence: 99%

Detailed wheel/rail geometry processing with the conformal contact approach

Vollebregt¹

2020

Multibody Syst Dyn

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This paper proposes a new way of considering wheel–rail contact in multibody systems simulation that goes beyond the traditional planar constraint and elastic approaches. In this approach, wheel–rail interaction is modelled as a force element with pressures and shear stresses distributed over a contact area that may be curved, supporting conformal contact situations. This by-passes the selection of the contact reference location and reference angle, which are delicate aspects of planar contact approaches. The idea is worked out introducing the curved reference surface as the new backbone for the computations, instead of the tangent plane used previously in planar contact approaches. The steps are described by which the curved reference is constructed in CONTACT, using generic facilities for markers, grids, and coordinate transformations, by which generic wheel/rail configurations can be analyzed in a fully automated way. Numerical results show the capabilities of the new method for measured, worn profiles, suppressing discontinuities in the forces when multiple contact patches split or merge. A further application concerns the evaluation of strategies used in planar contact approaches. There we find that the tangent plane’s inclination is of the biggest importance. This should be defined in an averaged way to achieve maximum correspondence to the more detailed curved contact approach.

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Evaluating the impact of rail surface roughness post-grinding: An experimental and elastoplastic modelling approach

Edjeou,

Moström,

Asplund

et al. 2025

Tribology International

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Approximating the influence coefficients of non-planar elastic solids for conformal contact analysis

Cited by 7 publications

References 17 publications

Challenges and progress in the understanding and modelling of the wheel–rail creep forces

Challenges and progress in the understanding and modelling of the wheel–rail creep forces

Detailed wheel/rail geometry processing with the conformal contact approach

Evaluating the impact of rail surface roughness post-grinding: An experimental and elastoplastic modelling approach

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