A study of loading path influence on fatigue crack growth under combined loading

Feng, Miaolin; Ding, Fei; Jiang, Yanyao

doi:10.1016/j.ijfatigue.2005.04.002

Cited by 22 publications

(6 citation statements)

References 32 publications

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“…Does the loading path have an intrinsic influence, or can all this influence be captured through appropriate corrections for closure and friction effects on stress intensity factors, that is, by the use of K effective I , K effective II , K effective III ? This problem is complex and no clear answer emerges from the literature on non-proportional mixedmode I and II (Gao et al 1983;Hourlier et al 1985;Wong et al 1996Wong et al , 2000Planck and Kuhn 1999;Yu and Abel 2000;Doquet and Pommier 2004) or mode I and III (Feng et al 2006). The latter concludes: "with identical loading magnitudes in the axial and torsional directions, the crack growth and crack profiles are strongly dependent on the loading path.…”

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Influence of the loading path on fatigue crack growth under mixed-mode loading

et al. 2009

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International audienceFatigue crack growth testswere performed under various mixed-mode loading paths, on maraging steel. The effective loading paths were computed by finite element simulations, in which asperity-induced crack closure and friction were modelled. Application of fatigue criteria for tension or shear-dominated failure after elastic–plastic computations of stresses and strains, ahead of the crack tip, yielded predictions of the crack paths, assuming that the crack would propagate in the direction which maximises its growth rate. This approach appears successful in most cases considered herein

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Influence of the loading path on fatigue crack growth under mixed-mode loading

et al. 2009

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“…Feng et al [47] studied the growth behavior of subsurface cracks under different load paths and concluded that the models based on strain energy release rate cannot embrace this effect and a mixed mode crack growth model is necessary.…”

Section: Discussionmentioning

confidence: 99%

Review on the Fatigue Behavior of the Wheels of Railway Vehicles in Contact With Rail

Toth

Macuta

2020

MTD

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Rail transport is essential to the EU's strategy for a more sustainable transport sector, economic and social cohesion and connecting Europeans at and between each Member State. EU trend is to support the railway sector as a clean, main mode of transport at European level. The European rail system carries around 1.6 billion tones of freight and 9 billion passengers each year. The railway sector has a substantial contribution to the EU economy, directly employing over 1 million people. With the technological evolution of railway vehicles, it is important to focus on safety issues. Wheels are one of the most critical components of railway vehicles, as their failure can lead to derailment. Therefore, an exact project on the control of the problem of wheel fatigue and knowledge of the effective parameters on their life, can improve the life of the whole structure. Due to the fact that the nature of the loads applied to the wheels is repeated, fatigue is very common mechanism of damage that can occur in several ways, such as: nucleation and growth of fatigue cracks, spalling, shelling, and so forth. The main sources of these phenomena are the rolling contact loads, the thermal loads between the wheel-rail and the wheel-brake block, created in the braking phase, the presence of structural defects in the wheel material; it follows that they cannot be omitted in a rigorous design. Increasing of speed aggravates these factors and exacerbates the problem of thermal fatigue of the wheels. In this paper we present a series of studies that focused on the wear of the wheels of railway vehicles in contact with the steering track (rail) to fatigue.

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“…The load path influence under combined mode I + III was studied by Feng et al Comparing the fatigue lives under proportional loading and 90° as well as 180° out‐of phase loading with same extreme and mean load values, they found the 90° out‐of‐phase loading to give the shortest, whereas the 180° out‐of‐phase loading leading to the largest lives. Concerning the crack growth path, they also found significant differences for the 3 load cases in crack growth angle and crack slant angle.…”

Section: Fatigue Crack Growth Under Nonproportional Mixed Modementioning

confidence: 99%

Fatigue of engineering structures under combined nonproportional loads: An overview

Vormwald

Hertel

Zerres

2018

Fatigue Fract Eng Mat Struct

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Nonproportionality in fatigue is a matter of loading sequences acting on structures. In such loading cases, a life assessment‐based search of the initiation site is required. This means that for a variety of potential sites, their stress‐strain sequences must be determined and the corresponding fatigue lives have to be calculated. For the determination of local stress‐strain sequences, a superposition of the action of loads at all times for all potential sites must be performed. The superposition has not only to be performed at a particular time of a load reversal but also for a sufficiently large number of intermediate points in time. For the assessment of crack initiation under local nonproportional stress‐strain sequences, a multiaxial fatigue damage hypothesis must be specified. Due to the superiority with respect to accuracy, critical plane approaches are the favourite ones when dealing with nonproportional fatigue of ductile metals. For describing fatigue crack growth, the time sequences for the stress intensity factors corresponding to the 3 opening modes must be obtained by superposition. A mixed‐mode hypothesis must be applied to predict both the direction and the increment of crack growth at each crack front point. A first prediction trial should be based on an appropriate extension of the maximum tangential stress hypothesis. An application of a variant of the maximum shear stress hypothesis might be an amendment. Especially in the case of crack turning, the consideration of crack face contact is mandatory.

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A study of loading path influence on fatigue crack growth under combined loading

Cited by 22 publications

References 32 publications

Influence of the loading path on fatigue crack growth under mixed-mode loading

Influence of the loading path on fatigue crack growth under mixed-mode loading

Review on the Fatigue Behavior of the Wheels of Railway Vehicles in Contact With Rail

Fatigue of engineering structures under combined nonproportional loads: An overview

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