A review on 3D-FE adaptive remeshing techniques for crack growth modelling

Branco, R.; Antunes, F.V.

doi:10.1016/j.engfracmech.2015.05.023

Cited by 134 publications

(55 citation statements)

References 213 publications

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“…According to the literature, methods applied to predict crack shape evolution can generally be classified into two categories: One is the adaptive remeshing technique [36,39,42,48,49], which realises an automatic update of the mesh around the new crack front extended stepwise from an initially predefined crack, based on the FE-determined SIFs along the crack front. Another category is the analytical process based on closed-form solutions for SIF, which are usually calibrated using the FE-determined SIFs along the crack front for varying crack shapes and sizes [35,44,50].…”

Section: Prediction Of the Crack Shape (A/c) Evolutionmentioning

confidence: 99%

Numerical modelling of the fatigue crack shape evolution in a shot-peened steam turbine material

You

Achintha

et al. 2017

International Journal of Fatigue

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In this study, the short crack initiation and growth behaviour in a notched sample under low-cycle fatigue (LCF) was investigated in a low-pressure steam turbine material. Different crack initiation mechanisms and crack shape evolution processes were experimentally observed in samples subjected to different surface treatments: polished, T0 (industrially applied shot peening process) and T1 (a less intense shot peening process). To better understand the effects of shot peening on fatigue, a 3D finite element (FE) model was developed to investigate the interaction between crack growth and the effects induced by shot peening. Firstly, residual stress redistribution caused by both mechanical loading and the presence of a crack was numerically investigated. This model was also used to successfully predict the differences in crack shape evolution between varying surface conditions, and quantified the retardation of short crack growth behaviour resulting from shot peening. Finally, the 3D model introduced in this study was compared with a previously developed 2D model with plane strain assumptions to demonstrate the limitation of the 2D model in simulating the crack growth behaviour, and to emphasise the importance of taking the 3D crack shape into account when evaluating the short crack growth behaviour.

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Section: Prediction Of the Crack Shape (A/c) Evolutionmentioning

confidence: 99%

Numerical modelling of the fatigue crack shape evolution in a shot-peened steam turbine material

You

Achintha

et al. 2017

International Journal of Fatigue

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“…The possible errors due to the choice in extrapolation range are therefore most likely considerably lower than those mentioned above. This indicates a considerable weakness in the displacement extrapolation technique however, which is rarely emphasized in relevant reviews …”

Section: Resultsmentioning

confidence: 99%

Stress intensity factors for circumferential through‐wall cracks in thin‐walled cylindrical shells subjected to tension and torsion

Rege

Pavlou

2019

Fatigue Fract Eng Mat Struct

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In order to assess the structural integrity of tubular members or pipes containing circumferential through‐wall cracks, their stress intensity factor solutions are required. While stress intensity factors for tension and bending are available, few solutions exist for the case of torsion, even though these components may also be subjected to torque. In this paper, the finite element method is used to compute the stress intensity factors for this geometry under tension and torsion. Shell elements are employed to compute the results for thin shells by the means of the displacement extrapolation technique. The computed results indicate that the available analytical solution for torsional loading, which is based on shallow shell theory, is nonconservative for long cracks in thin shells. Shallow shell theory is in general not applicable to long cracks, and the present work is therefore able to provide solutions for a wider range of crack lengths than what is currently available.

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“…A review of the literature on finite element analysis of three-dimensional fatigue cracks is found in [50], while an overview of the finite element analysis of plasticity induced crack closure is found in [45]. We will here limit our discussion to three of the latest works.…”

Section: Current Trendsmentioning

confidence: 99%

A review of fatigue crack propagation modelling techniques using FEM and XFEM

Rege

Lemu

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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The study of the dissipation heat flow and the acoustic emission during the fatigue crack propagation in the metal A N Vshivkov, A Yu Iziumova, I A Panteleev et al. noAbstract. Fatigue is one of the main causes of failures in mechanical and structural systems. Offshore installations, in particular, are susceptible to fatigue failure due to their exposure to the combination of wind loads, wave loads and currents. In order to assess the safety of the components of these installations, the expected lifetime of the component needs to be estimated. The fatigue life is the sum of the number of loading cycles required for a fatigue crack to initiate, and the number of cycles required for the crack to propagate before sudden fracture occurs. Since analytical determination of the fatigue crack propagation life in real geometries is rarely viable, crack propagation problems are normally solved using some computational method. In this review the use of the finite element method (FEM) and the extended finite element method (XFEM) to model fatigue crack propagation is discussed. The basic techniques are presented, together with some of the recent developments. IntroductionComponents which are subjected to fluctuating loads are found virtually everywhere: Vehicles and other machinery contain rotating axles and gears, pressure vessels and piping may be subjected to pressure fluctuations (e.g. water hammer) or repeated temperature changes, structural members in bridges are subjected to traffic loads and wind loads, while those in ships and offshore structures are subjected to the combination of wind loads, wave loads and currents. If the components are subjected to a fluctuating load of a certain magnitude for a sufficient amount of time, small cracks will nucleate in the material. Over time, the cracks will propagate, up to the point where the remaining cross-section of the component is not able to carry the load, at which the component will be subjected to sudden fracture [1]. This process is called fatigue, and is one of the main causes of failures in structural and mechanical components [2]. In order to assess the safety of the component, engineers need to estimate its expected lifetime. The fatigue life is the sum of the number of loading cycles required for a fatigue crack to nucleate/initiate, and the number of cycles required for the crack to propagate until its critical size has been reached [2,3]. In this paper, computational methods to estimate the lifespan of a propagating crack whose initial geometry is known will be considered.Estimations of the fatigue crack propagation rate, da/dN, are normally based on a relation with the range of the stress intensity factor, ΔK, which is a linear elastic fracture mechanics (LEFM) parameter for quantifying the load and geometry of the crack. Paris, Gomez and Anderson [4] first proposed the existence of such a relation in 1961, and its simplest form is the Paris law [5]:

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A review on 3D-FE adaptive remeshing techniques for crack growth modelling

Cited by 134 publications

References 213 publications

Numerical modelling of the fatigue crack shape evolution in a shot-peened steam turbine material

Numerical modelling of the fatigue crack shape evolution in a shot-peened steam turbine material

Stress intensity factors for circumferential through‐wall cracks in thin‐walled cylindrical shells subjected to tension and torsion

A review of fatigue crack propagation modelling techniques using FEM and XFEM

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