Influence of local residual stresses on fatigue crack initiation

Mlikota, Marijo; Schmauder, Siegfried; Dogahe, Kiarash; Božić, Željko

doi:10.1016/j.prostr.2021.03.002

Cited by 24 publications

(3 citation statements)

References 24 publications

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“…On the one hand, the inhibited transition from short crack propagation to long crack propagation results in a higher fatigue life. On the other hand, compressive residual stresses lead to a shift of the crack initiation site into the interior of the material, as also observed in many other studies [33,[42][43][44][45][46][47][48]. This is presumably promoted by tensional residual stresses, which occur in sample interior due to the equilibrium of forces [2].…”

Section: Discussionmentioning

confidence: 55%

“…Compressive residual stresses seem to shift the initiation site of the fatal crack from the sample surface to the interior of the sample [33,[42][43][44][45][46][47][48]. Despite existing compressive residual stresses, crack initiation of the fatal crack also happens at the sample surface, particularly at surfaces of unpolished samples with an increased surface roughness due to shot peening [39,[49][50][51].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Residual Stresses on the Crack Initiation and Short Crack Propagation in a Martensitic Spring Steel

Wildeis

Christ

Brandt

2022

Metals

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The crack initiation and short crack propagation in a martensitic spring steel were investigated by means of in-situ fatigue testing. Shot peened samples as well as untreated samples were exposed to uniaxial alternating stress to analyze the impact of compressive residual stresses. The early fatigue damage started in both sample conditions with the formation of slip bands, which subsequently served as crack initiation sites. Most of the slip bands and, correspondingly, most of the short fatigue cracks initiated at or close to prior austenite grain boundaries. The observed crack density of the emerging network of short cracks increased with the number of cycles and with increasing applied stress amplitudes. Furthermore, the prior austenite grain boundaries acted as obstacles to short crack propagation in both sample conditions. Compressive residual stresses enhanced the fatigue strength, and it is assumed that this beneficial effect was due to a delayed transition from short crack propagation to long crack propagation and a shift of the crack initiation site from the sample surface to the sample interior.

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Section: Discussionmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Influence of Residual Stresses on the Crack Initiation and Short Crack Propagation in a Martensitic Spring Steel

Wildeis

Christ

Brandt

2022

Metals

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“…In summary, residual stresses significantly influence the fatigue behavior of impact-damaged components, as also demonstrated in [9,10] for other mechanical situations. This study examines the residual stress distribution induced by the impact-damage in an hourglass specimen made of 7075-T6 aluminium alloy, which is a material commonly used for manufacturing aeronautical components.…”

Section: Introductionmentioning

confidence: 63%

Taguchi analysis on finite element results to identify the most influential parameters on stresses after impact-damage

Arcieri,

Baragetti

2024

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

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Impact-damage can reduce the fatigue life of mechanical components as a consequence of premature crack growth due to the occurrence of high residual stresses. In this work, finite element analyses were conducted to evaluate the residual stresses in a 7075-T6 aluminium hourglass specimen for various impact cases. The Taguchi method was applied to the finite element results to identify which parameters most influence the residual stresses in the specimen. The outcomes showed that the impact speed is the most influential factor for axial stresses, followed by the material and the size of the impacting object. The factor that most affects the von Mises stresses is the object size followed by its material and the impact speed.

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A strategy for rib-to-deck crack propagation analysis and strengthening of orthotropic deck bridges

Ahmadivala

Berthellemy

Orcesi

et al. 2022

Engineering Failure Analysis

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Influence of local residual stresses on fatigue crack initiation

Cited by 24 publications

References 24 publications

Influence of Residual Stresses on the Crack Initiation and Short Crack Propagation in a Martensitic Spring Steel

Influence of Residual Stresses on the Crack Initiation and Short Crack Propagation in a Martensitic Spring Steel

Taguchi analysis on finite element results to identify the most influential parameters on stresses after impact-damage

A strategy for rib-to-deck crack propagation analysis and strengthening of orthotropic deck bridges

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