A reexamination of plasticity-induced crack closure in fatigue crack propagation

Jiang, Yanyao; Feng, Miaolin; Ding, Fei

doi:10.1016/j.ijplas.2004.11.005

Cited by 90 publications

(57 citation statements)

References 32 publications

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“…These determine the computation time (quite high in elastic-plastic analysis) and disk space requirements. According Jiang et al [35], a lower boundary for L 1 is 0.001 mm. The mesh refinement also affects the position of the first node behind crack tip, which significantly influences the opening level as discussed in point 4.5.…”

Section: Finite Element Discretizationmentioning

confidence: 98%

“…As indicated in Table 2, significant work has been developed to optimize the numerical parameters and relevant conclusions have been found. Revision papers have been published by McClung and Sehitoglu [42], Solanki et al [46] and Jiang et al [35], among others.…”

Section: Numerical Aspectsmentioning

confidence: 99%

“…Solanki et al [28] indicated that a crack growing under cyclic loading with R = 0 had a reversed plastic zone about 1/10 the size of the forward plastic zone (while for a stationary crack this is about 1/4 the size). Therefore, if L 1 is too large, the occurrence Number of load cycles between crack increments (P2) [35] Number of crack increments necessary for stabilisation (Da = RDa i P r p,m ) [21,28,35,37] Closure definition Last contact or inversion of stresses at crack tip [22,44] Crack opening or crack closure [36,45] of reversed plasticity will not be modelled. The increase in DK, produced by the increase in crack length or Dr, and the use of higher order elements may be accomplished by an increase in L 1 .…”

Section: Finite Element Discretizationmentioning

confidence: 99%

“…Numerical simulation studies considering mixed hardening behaviour are still rare. Recently, Jiang et al [35] published a comparative study considering three different mixed hardening models: the purely kinematic Prager-Ziegler hardening rule with an elastic-perfectly plastic (EPP) stress-strain relationship, the purely kinematic Prager-Ziegler hardening rule with a bilinear (BL) stress-strain relationship and a kinematic hardening model developed by the authors. In this study, they found a strong dependence of stabilized crack closure values on the mechanical model in use.…”

Section: Materials Modelmentioning

confidence: 99%

“…1a) was investigated (other authors have studied this geometry [21,25,28,35,45,46,65]). The geometry and size of the MT specimen, with initial crack size a o = 5.78 mm, were chosen with reference to previous experimental work [3].…”

Section: Finite Element Discretization Of the Cracked Bodymentioning

confidence: 99%

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Numerical simulation of plasticity induced crack closure: Identification and discussion of parameters

Antunes

Rodrigues

2008

Engineering Fracture Mechanics

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Numerical studies play a major role in the understanding and prediction of plasticity induced crack closure (PICC). However, the available numerical models can be considered simplifications of reality as they consider discrete crack propagations, relatively high fatigue crack growth rates (FCGR), sharp cracks, and propagation occurring at well-defined loads. Besides, there are a great number of numerical and physical parameters affecting the predictions of PICC. The aim of this paper is to discuss the numerical study of PICC. The numerical parameters affecting the accuracy of the numerical simulations, and the dependent parameters used to characterise the plastic wake and the closure level, are identified. The influence of the radial size of crack front elements and crack propagation is analysed. An extrapolation model is proposed, with excellent results. An intrinsic uncertainty is associated with the number of load cycles between crack increments and the definition of crack closure level. Finally, the effect of the stress ratio (R) on crack closure level is analysed.

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Section: Finite Element Discretizationmentioning

confidence: 98%

Section: Numerical Aspectsmentioning

confidence: 99%

Section: Finite Element Discretizationmentioning

confidence: 99%

Section: Materials Modelmentioning

confidence: 99%

Section: Finite Element Discretization Of the Cracked Bodymentioning

confidence: 99%

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Numerical simulation of plasticity induced crack closure: Identification and discussion of parameters

Antunes

Rodrigues

2008

Engineering Fracture Mechanics

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Elucidating the Mechanism of Fatigue Crack Acceleration Following the Occurrence of an Underload

et al. 2016

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Fatigue Crack Growth Rate (FCGR) is altered by a single anomalous load exceeding cyclic maximum (Overload) or compressive load below cyclic minimum (Underload). The authors study fatigue crack acceleration due to a single compressive Underload using residual stress mapping (by synchrotron XRD) and crack closure analysis (by DIC). The relative influence and duration of these two principal causes of FCGR alteration are revealed. Validated FEA model is used for parametric analysis of the effect of baseline cyclic loading ratio and magnitude of Underload on the cyclic J-integral.

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A Continuum Mechanics Approach for Crack Initiation and Crack Growth Predictions

Jiang¹

2006

Mat.-wiss. u. Werkstofftech.

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Herrn H. Nowack zum 65. Geburtstag gewidmet Very often, different approaches are used for crack initiation and crack growth predictions. The current article introduces a recently developed approach that can be used for the predictions of both crack initiation and crack propagation. A basic assumption is that both crack nucleation and crack growth are governed by the same fatigue damage mechanisms and a single fatigue damage criterion can model both stages. A rule is that any material point fails to form a fresh crack if the total accumulated fatigue damage reaches a limit. For crack initiation predictions, the stresses and strains are obtained either directly from experiments or though a numerical analysis. For the prediction of crack growth, the approach consists of two steps. Elastic-plastic stress analysis is conducted to obtain the detailed stress-strain responses. A general fatigue criterion is used to predict fatigue crack growth. Compact specimens made of 1070 steel were experimentally tested under constant amplitude loading with different R-ratios and the overloading influence. The capability of the approach to predict both crack initiation and the crack growth under these loading conditions was demonstrated by comparing the predictions with the experimental observations.Keywords: Crack growth, crack initiation, continuum mechanics, fatigue prediction.

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A reexamination of plasticity-induced crack closure in fatigue crack propagation

Cited by 90 publications

References 32 publications

Numerical simulation of plasticity induced crack closure: Identification and discussion of parameters

Numerical simulation of plasticity induced crack closure: Identification and discussion of parameters

Elucidating the Mechanism of Fatigue Crack Acceleration Following the Occurrence of an Underload

A Continuum Mechanics Approach for Crack Initiation and Crack Growth Predictions

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