Analysis of the effects of compressive stresses on fatigue crack propagation rate

Zhang, J.; He, Xiao; Du, Shan Yi

doi:10.1016/j.ijfatigue.2006.12.007

Cited by 29 publications

(20 citation statements)

References 16 publications

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“…This would indicate a larger plastic zone ahead of the crack tip, thus increasing the fatigue crack propagation. This increase in the plastic zone size is mainly caused by non‐zero near CTOD, which acts as a stress concentration location . This illustrates that the size of the yield zone depends on the relative magnitude of compressive stresses, which in turn affects the FCGR .…”

Section: Finite Element Analysis Resultssupporting

confidence: 93%

“…Similar results have also been reported by other investigators for similar materials (e.g. Zhang et al …”

Section: Finite Element Analysis Resultssupporting

confidence: 84%

“…This increase in the plastic zone size is mainly caused by non‐zero near CTOD, which acts as a stress concentration location . This illustrates that the size of the yield zone depends on the relative magnitude of compressive stresses, which in turn affects the FCGR . This phenomenon will be further investigated and discussed in the subsequent section.…”

Section: Finite Element Analysis Resultsmentioning

confidence: 97%

“…14 This illustrates that the size of the yield zone depends on the relative magnitude of compressive stresses, which in turn affects the FCGR. 12,14 This phenomenon will be further investigated and discussed in the subsequent section.…”

Section: Effect Of Csc On the Crack Front Stressesmentioning

confidence: 97%

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Analytical and computational investigation into the influence of the compressive stress cycles on crack growth under variable amplitude loading using CTOD

Iranpour

Taheri‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

2014

Fatigue Fract Eng Mat Struct

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Fatigue crack growth rate of 6061 T651 aluminum alloy centre‐cracked plates, subject to a variable amplitude loading (VAL), is established using a coupled analytical/computational approach. The method utilises the generalised Willenborg retardation model in conjunction with the Walker model, with several of the models parameters obtained through nonlinear finite element analyses. A two‐parameter approach is also used in this study to explore the influence of compressive stress cycles in a VAL scenario on the crack tip opening displacement, and in turn, on the resulting fatigue crack growth rate of the material. The work includes the evaluation of the crack tip opening displacement and residual stresses in the vicinity of a crack by nonlinear finite element analysis, and application of the Generalised Willenborg model to evaluate the fatigue crack growth; particularly, under the influence of the compressive stress cycles, tensile overloads and underloads have been investigated. The finite element analysis results are compared with the experimental results reported in earlier studies by the authors. The results further demonstrate two important phenomena, that is, (i) the influence of FCG retardation effects due to the tensile overloads and (ii) the acceleration effect due to the applied compressive underloads of a VAL stress–time history.

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Section: Finite Element Analysis Resultssupporting

confidence: 93%

“…Similar results have also been reported by other investigators for similar materials (e.g. Zhang et al …”

Section: Finite Element Analysis Resultssupporting

confidence: 84%

Section: Finite Element Analysis Resultsmentioning

confidence: 97%

Section: Effect Of Csc On the Crack Front Stressesmentioning

confidence: 97%

See 2 more Smart Citations

Analytical and computational investigation into the influence of the compressive stress cycles on crack growth under variable amplitude loading using CTOD

Iranpour

Taheri‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

2014

Fatigue Fract Eng Mat Struct

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“…Iranpour recommended that the compressive stress cycles should be considered when establishing the fatigue crack growth rate of materials. Zhang confirmed that the compression part of the load cycle had a significant effect on the near crack‐tip parameters. Besides, Benz revealed that the crack closure behaviour was in good correlation with cyclic plastic deformations at the crack tip at negative stress ratios.…”

Section: Introductionmentioning

confidence: 91%

A new expression for crack opening stress determined based on maximum crack opening displacement under tension–compression cyclic loading

Chen

You

Huang

2017

Fatigue Fract Eng Mat Struct

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A B S T R A C T The maximum crack opening displacement is introduced to investigate the effect of compressive loads on crack opening stress in tension-compression loading cycles. Based on elastic-plastic finite element analysis of centre cracked finite plate and accounting for the effects of crack geometry size, Young's modulus, yield stress and strain hardening, the explicit expression of crack opening stress versus maximum crack opening displacement is presented. This model considers the effect of compressive loads on crack opening stress and avoids adopting fracture parameters around crack tip. Besides, it could be applied in a wide range of materials and load conditions. Further studies show that experimental results of da/dN À ΔK curves with negative stress ratios could be condensed to a single curve using this crack opening stress model.Keywords compressive load effect; crack opening stress; finite element analysis; maximum crack opening displacement; tension-compression loading. N O M E N C L A T U R Ea = initial half crack length E = Young's modulus k = slope K max = maximum stress intensity factor K op = crack opening stress intensity factor L = half-length of plate L e = the smallest element size in crack tip n = strain-hardening exponent of material R = stress ratio, R = σ min /σ max r y = crack-tip plastic zone size r p = crack-tip forward plastic zone size u max = maximum crack opening displacement corresponding to σ max (MCOD) u min = maxmum crack opening displacement corresponding to σ min W = half-width of plate ΔK eff = effective stress intensity factor range ΔK = stress intensity factor range Δu = variable quantity of maximum crack opening displacement (VMCOD) σ op = crack opening stress (COS) σ s = yield stress σ max = maximum stress in the cyclic tensile load, which is positive σ min = minimum stress in the cyclic tensile load, which is negative σ op_0 = crack opening stress when the remote applied minimum stress is zero ν = Poisson's ratioCorrespondence: Y. Huang.

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Stress corrosion crack initiation and propagation before proceeding to Stage 2 for hydrostatically tested pipeline steels

Wang

Lamborn²,

Chen

2022

J Mater Sci

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Analysis of the effects of compressive stresses on fatigue crack propagation rate

Cited by 29 publications

References 16 publications

Analytical and computational investigation into the influence of the compressive stress cycles on crack growth under variable amplitude loading using CTOD

Analytical and computational investigation into the influence of the compressive stress cycles on crack growth under variable amplitude loading using CTOD

A new expression for crack opening stress determined based on maximum crack opening displacement under tension–compression cyclic loading

Stress corrosion crack initiation and propagation before proceeding to Stage 2 for hydrostatically tested pipeline steels

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