Characterization of Threshold Stress Intensity as a Function of Near-Tip Residual Stress: Theory, Experiment, and Applications

Sunder, R.

doi:10.1520/mpc20140037

Cited by 16 publications

(17 citation statements)

References 20 publications

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“…A factor of about two was observed between the fatigue threshold and the elastic range observed numerically . This difference was attributed to a different mechanism of FCG near threshold linked to environmental damage …”

Section: Introductionmentioning

confidence: 99%

“…13 This difference was attributed to a different mechanism of FCG near threshold linked to environmental damage. 14 However, the assumption that the elastic range of ΔK does not contribute to FCG may not be consensual. There are also authors considering two driving forces for FCG: ΔK and K max .…”

Section: Introductionmentioning

confidence: 99%

“…16,17 This paper studies regime II of FCG in metals, where plastic deformation is widely accepted as the controlling mechanism. 18,19 Near threshold and in air, the crack tip stresses play a role, 14 therefore the elastic range of ΔK may also be expected to affect FCG.…”

Section: Introductionmentioning

confidence: 99%

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Elastic correction of fatigue crack growth laws

Antunes

Prates

Camas

et al. 2019

Fatigue Fract Eng Mat Struct

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Fatigue crack growth (FCG) is usually studied assuming that ΔK is the driving parameter. An effective ΔK is considered in the presence of crack closure. However, after crack opening, there is an elastic regime that does not contribute to FCG. The objective here is to quantify this elastic range of ΔK, ΔKel, for different loading conditions and material properties. The yield stress was found to be the most important material parameter, followed by the hardening exponent. A linear decrease of ΔKel with ΔK was found for the 7050‐T6, 6082‐T6, and 6016‐T4 aluminium alloys, while the 304L stainless steel presented a slight increase. On the other hand, the increase of Kmax was found to increase the elastic fatigue range. Relatively high values of elastic range were obtained for the plane strain state, compared with the plane stress state.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Elastic correction of fatigue crack growth laws

Antunes

Prates

Camas

et al. 2019

Fatigue Fract Eng Mat Struct

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show abstract

“…An experimental procedure was developed to characterize intrinsic (closure free) component K th over a wide range of highly controlled and computable near-tip residual stress conditions. It was initially validated on 2024-T3 Al-alloy [18], then fine-tuned and demonstrated on a variety of materials [19] including additive manufactured materials [27].…”

Section: Intrinsic Threshold For Atmospheric Fatigue Crack Growthmentioning

confidence: 99%

“…However, in Ref. 18, it is referred to as ΔK th , while we now refer to it as K th in order to differentiate it from the notation used in the literature that represents ΔK th as the sum of intrinsic and extrinsic components.]. The envelope of σ* variation under both constant amplitude as well as variable amplitude loading, including the partial cases that represent cyclic R-curve and compression-compression loading conditions are described.…”

Section: Introductionmentioning

confidence: 99%