Analysis of crack growth under rolling-sliding contact

Daves, Werner; Kráčalík, Michal; Scheriau, Stephan

doi:10.1016/j.ijfatigue.2018.12.006

Cited by 21 publications

(19 citation statements)

References 36 publications

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“…The maximum elastic shear strength is based on Skinner 11 who established a maximum BHN for wrought steel of 255. According to the current design procedure for cast iron wheels, the maximum shear stress due to the applied loads, computed from Equation 2, must be less than or equal to the ultimate shear stress given by Equation 6. This, however, is the maximum elastic shearing stress suggested by Skinner 11 for wrought steel wheels.…”

Section: Current Design Practicementioning

confidence: 99%

“…Cracks initiated and growing under rolling‐sliding contact were also the subject of a study by Daves et al These authors used a two‐dimensional finite‐element model to evaluate the influence of contact pressure and slip on the crack driving force, crack growth rate and growth direction.…”

Section: Contact Fatiguementioning

confidence: 99%

“…According to these authors, their model considers microcrack initiation, coalescence, and propagation stages. Computer modeling of process of accumulation of RCF damage in railway wheels was also the subject of an investigation by Sakalo et al 24 Cracks initiated and growing under rolling-sliding contact were also the subject of a study by Daves et al 6 These authors used a two-dimensional finite-element model to evaluate the influence of contact pressure and slip on the crack driving force, crack growth rate and growth direction.…”

Section: Contact Fatiguementioning

confidence: 99%

“…The objective of the research program presented in this article is to examine the performance of cast iron wheels under cyclic loading and assess their contact fatigue behavior through a series of full‐scale tests. The high cost associated with full‐scale experimental research on the fatigue performance of structural elements under rolling contact has led researchers to rely more on theoretical models than experiment‐based evidence to develop appropriate failure criteria . This article presents experimental results that can be used as a basis for comparison with results derived from theoretical models.…”

Section: Introductionmentioning

confidence: 99%

“…The high cost associated with full-scale experimental research on the fatigue performance of structural elements under rolling contact has led researchers to rely more on theoretical models than experiment-based evidence to develop appropriate failure criteria. [6][7][8][9] This article presents experimental results that can be used as a basis for comparison with results derived from theoretical models.…”

Section: Introductionmentioning

confidence: 99%

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Experimental evaluation of the fatigue life of hydraulic gate cast iron rollers

Lashari

Polyzois

2020

Engineering Reports

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Fixed‐wheel gates with wheels mounted on both sides that roll on roller path plates are used in both emergency intake gates and spillway gates in hydrogenerating stations. Environmental corrosion along with high wheel loads cause differences in the profile of the roller path surface. Combined with the relatively high torsional stiffness of the gate end girders, a condition of wheel load redistribution occurs where some wheels are relieved of load while others are loaded beyond their maximum design values. Failure of one wheel could jeopardize the overall operation of the gate. Furthermore, frequent operation of these gates result in changes in the stress profile in both wheels and roller paths that, potentially, could lead to failure. Currently, design guidelines for gate wheels and roller paths do not consider the fatigue life of these elements. Research‐based evidence is provided to support changes to these guidelines.

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Section: Current Design Practicementioning

confidence: 99%

Section: Contact Fatiguementioning

confidence: 99%

Section: Contact Fatiguementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental evaluation of the fatigue life of hydraulic gate cast iron rollers

Lashari

Polyzois

2020

Engineering Reports

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Procedure to implement shear evolution in fast rolling models with online capability on the example of an aluminum flat rolling process

et al. 2022

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The rolling process induces a heterogeneous deformation over the rolling stock height. The causes are the frictional shear stress between the contacting surfaces and the roll gap geometry. They induce a complex material flow within the rolling stock describable by the shear evolution. The shear evolution has a significant impact on rolling values like grain size and crystallographic texture and therefore on the final material properties of the rolled product. Industry and academia use fast rolling models for flat rolling processes to predict the material properties due to their short computation time. The time advantage enables online applicability to adapt processes in real time or to evaluate the influence of different process conditions several times within seconds. However, these models have a limitation regarding the shear evolution. They do not consider all relevant influences or apply simplifying assumptions, valid only for specific rolling cases. This work presents a general approach to extend fast rolling models to consider the shear evolution without any restrictions to specific rolling cases. The approach derives the shear evolution as shear angle $$\alpha$$ α evolution based on FE simulations. The shear angle $$\alpha$$ α is a geometrical description and not influenced by rotations, which occur during the rolling process. This enables an enhanced and simple analysis of the material flow. The outcome is an extended model that completely describes the deformation along a deformation path and enables the calculation of each desired deformation value (strain, deformation gradient, velocity gradient, etc.).

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