Fatigue crack shielding and deflection in plain bearings under large-scale yielding

Burke-Veliz, A.; Syngellakis, S.; Reed, P.A.S.

doi:10.1016/j.engfailanal.2009.03.032

Cited by 3 publications

(4 citation statements)

References 28 publications

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“…In contrast, the actual state of stress observed in bearings under service conditions is three-dimensional and this may reduce the validity of crack growth results obtained under bending conditions [18]. The complexity of the state of stress may be enhanced by other factors such as service temperature, penetration of oil into the crack and solid to solid contact.…”

Section: Discussionmentioning

confidence: 70%

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Residual and cyclic stresses in automotive plain bearings

Syngellakis¹,

Burke-Veliz²

2012

WIT Transactions on Engineering Sciences

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This paper presents a review of existing methodologies for predicting stress and strain development in automotive plain bearings. Initially, it deals with the modelling of the forming and fitting operations, leading to the determination of residual stresses, then with the numerical processes of generating cyclic stresses and plastic strains due to the reciprocating engine forces. Modelling tools as well as their adopted assumptions and simplifications are explained. Particular attention is given to the distinction between and effects of hydrodynamic and elastohydrodynamic lubrication conditions. The output of such analyses is illustrated through the inclusion of some typical results; its significance is discussed in the context of bearing design against fatigue failure.

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Section: Discussionmentioning

confidence: 70%

“…The generation of such sub-models can be very useful in damage tolerant analyses since the creation of a full model incorporating a propagating crack would require enormous memory resources and computation times [18].…”

Section: Discussionmentioning

confidence: 99%

Residual and cyclic stresses in automotive plain bearings

Syngellakis¹,

Burke-Veliz²

2012

WIT Transactions on Engineering Sciences

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“…Apart from single-layer plain bearings, such layered architectures offer a compromise between hard and soft materials, satisfying the demanding requirements of high mechanical strength, conformability and good wear resistance properties at the same time [4]. In addition, layered structures can also contribute to the improvement of fatigue performance due to the existence of shielding/anti-shielding effects on CDF and crack deflections related to material interfaces [5].…”

Section: Introductionmentioning

confidence: 99%

A numerical study of crack shielding/anti-shielding in layered architectures

Laborda

Cook

et al. 2019

International Journal of Fatigue

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Previous research has indicated the potential effectiveness of adopting micro-scale layered architectures to improve the fatigue damage resistance of coatings. However, the optimisation of these coatings is difficult due to the existence of many different factors affecting fatigue performance in such micro-scale layered architectures. In particular, the interaction of successive shielding and anti-shielding processes on crack growth resistance is therefore addressed in this paper by numerical simulation analysis. The crack tip fields in a series of layered architectures were simulated based on varying assumed constitutive materials properties to reveal the interaction of shielding/anti-shielding characteristics in complex architectures in a simple exemplar system. The evolution of crack driving force (CDF) with crack length was calculated and linked to crack growth life to investigate the effect of the ordering of shielding/anti-shielding characteristics on the crack tip field and hence on crack growth life. Layered architectures with different numbers, ordering and placing of layers, were assessed and parametric studies of 4 layered architectures were carried out. This allows analysis of the effect of these individual factors on shielding and its interactive effect with anti-shielding in multilayered architectures. Understanding the combined effect on crack growth performance and overall fatigue life controlled by crack propagation provides insight into the generic design of micro-scale layered architectures.

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“…The evolution of CDF with crack length in layered architectures has been discussed by a series of researchers, [13][14][15][16][17][18] but most of these CDF investigations are for straight cracks. However, the crack path in layered architectures is complex, and the change of crack path will significantly affect the CDF.…”

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confidence: 99%

Modeling of crack path in layered architectures composed of dissimilar materials

Reed

Cook

et al. 2022

Fatigue Fract Eng Mat Struct

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In order to make full use of the potential fatigue crack growth resistance provided by layered architectures, a validated crack path simulation algorithm for crack propagation through different elements of the layered architectures was established. The crack path approaching a material interface was predicted by using the maximum tangential strain (MTSN) criterion and the crack behavior at the interface was simulated by a developed two-step method (a modified stressand-energy-based cohesive zone method considering the change in direction of an interface penetrating crack). The crack path simulation by using this algorithm in layered example architectures indicates (1) there are two criteria zones for the transition between crack deflection and penetration in terms of the relationship between interfacial strength and toughness; (2) the likelihood of a crack deflecting out of the interface will increase with the propagation of an interfacial crack; and (3) the architecture difference which affects shielding or anti-shielding behavior has a significant effect on crack deflection or penetration events.cohesive elements, crack path, finite element analysis, layered architectures, MTSN criterion | INTRODUCTIONLayered architectures can supply good fracture resistance due to the barriers provided to the evolution of flaws by the alternating hard and soft layers, thus being widely used in various engineering applications which experience complex service conditions. 1,2 For instance, different structures at different length scales are organized hierarchically to provide stiffness as well as fracture resistance in some biological systems. 1 Multi-layered components comprising three main functional layers are applied in some moving mechanical systems within the internal combustion engine, which provide the combined properties of high mechanical strength, conformability, good wear resistance, and fatigue performance. [3][4][5] Multilayer metal films are used to endure large stretching, compressing, or twisting deformations to resist the occurrence of cracking and buckling in stretchable electronics, especially paper-like electronic displays, wearable electronics, and prosthetic skin. [6][7][8] However, these varied advantages offered by layered architectures in the optimization of performance may be limited due to a lack of understanding of the failure mechanisms.A series of studies have been carried out on the mechanisms of fatigue of layered architectures, but most just focus on the effect of multiple layers on the crack growth behavior and note this extends the crack growth life in

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Fatigue crack shielding and deflection in plain bearings under large-scale yielding

Cited by 3 publications

References 28 publications

Residual and cyclic stresses in automotive plain bearings

Residual and cyclic stresses in automotive plain bearings

A numerical study of crack shielding/anti-shielding in layered architectures

Modeling of crack path in layered architectures composed of dissimilar materials

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