Relative fatigue life estimation of cylindrical hollow rollers in general pure rolling contact

Jadayil, Wisam Abu

doi:10.1002/tt.51

Cited by 9 publications

(4 citation statements)

References 19 publications

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“…The present authors are indebted to an anonymous referee for signalling that the above result, according to which a hollow pin of inner radius half the outer radius behaves similar to a solid pin, is confirmed by analogous conclusions valid for hollow rollers employed in roller bearings [14,15].…”

Section: Design Chartssupporting

confidence: 73%

Influence of the initial clearance on the peak stress in connecting-rod small ends

Pioli

Strozzi

Baldini

et al. 2009

Proceedings of the Institution of Mechanical Engineers, Part D:

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The stress increase that is caused by the presence of an initial clearance within thesmall end of connecting rods for motorbike and car engines is investigated. Plane analyticaland numerical modellings of the dry contact between the small-end and piston pin areadopted. Based upon a recent analytical result, a normalizing parameter is introduced, whichallows the stress concentration factor at the small-end bore sides to be expressed as a functionof a proper combination of the initial clearance between the small end and gudgeon pin, theapplied load, and Young’s modulus, for prescribed aspect ratios of the small end and hollowpin. Design diagrams summarizing the consequences of an initial clearance between the smallendbore and gudgeon pin on the eye peak stress are reported, which cover a wide range ofgeometries, clearances, and loadings. Selected comparisons between two-dimensional andthree-dimensional models are carried out

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Section: Design Chartssupporting

confidence: 73%

Influence of the initial clearance on the peak stress in connecting-rod small ends

Pioli

Strozzi

Baldini

et al. 2009

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…The thin wall of the rollers allows preloading, as opposed to cylindrical bearings with solid rollers. Preloading rollers on large bearings with hollow rollers increases radial stiffness and reduces vibrations [19].…”

Section: Introductionmentioning

confidence: 99%

Research on Increasing the Performance of Wind Power Plants for Sustainable Development

2019

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A topical issue globally is the development and implementation of renewable energy sources for sustainable development. To meet current requirements, the research in this paper is directed towards finding solutions to increase the performance and efficiency of wind power plants by implementing innovative solutions for hollow roller bearings developed through the use of sustainable growth programs in the field of green energy. Another solution that has the effect of increasing wind power performance consists of the implementation of a new large-size lubrication system for large-size bearings in wind energy units, which will increase their durability by developing maintenance capabilities. In this research, we will explore the possibility of introducing an innovative automated lubrication system in hollow roller bearings. The main results of the research, the innovative constructive solutions, will lead to important savings by lowering wind farm maintenance costs, increasing the durability of large bearings, and increasing the energy efficiency and yield of the whole system. The expected impact of implementing the solutions found will mainly be in the field of sustainable growth and environmental development.

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“…Since the first mathematical treatment of the contact problem of ideally smooth elastic solid, presented by Hertz in 1882, significant progress has been made in the field of contact mechanics. Many researchers (Harris and Aaronson, 1967; Scott, 1976; Darji and Vakharia, 2008; Abu-Jadayil, 2008; Bhateja and Hahn, 1980; Zhao, 1998) have found that hollow rollers have longer fatigue life than solid rollers. Here, a new cylindrical roller design is proposed in which a small hollow cylinder is embedded into another hollow cylinder; the so-called roller is given a name as “layered cylindrical hollow roller”.…”

Section: Introductionmentioning

confidence: 99%

A finite element analysis of an elastic contact between a layered cylindrical hollow roller and flat contact

Solanki

Vakharia

2017

ILT

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Purpose The purpose of this paper is to present a finite element analysis (FEA) which shows the comparison between a layered cylindrical hollow roller bearing and hollow roller bearing. Design/methodology/approach In this work, FEA is carried out to solve the elastic contact between a layered cylindrical hollow roller and flat contact for different hollowness percentages ranging from 10 to 80 per cent. Graphical solution is developed to determine the optimum hollowness of a cylindrical roller bearing for which induced bending stress should be within endurance limit of the material. Findings Different parameters such as von Mises stress, contact pressure, contact width and deformation are shown here. Originality/value The value of this research work is the calculation of contact width and other parameters using FEA for layered cylindrical hollow roller bearing.

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Relative fatigue life estimation of cylindrical hollow rollers in general pure rolling contact

Cited by 9 publications

References 19 publications

Influence of the initial clearance on the peak stress in connecting-rod small ends

Influence of the initial clearance on the peak stress in connecting-rod small ends

Research on Increasing the Performance of Wind Power Plants for Sustainable Development

A finite element analysis of an elastic contact between a layered cylindrical hollow roller and flat contact

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