Creep and Creep-Fatigue Crack Growth in Aluminium Alloys

Hénaff, Gilbert; Odemer, Grégory; Journet, Bertrand

doi:10.5772/15153

Cited by 2 publications

(2 citation statements)

References 20 publications

(20 reference statements)

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“…Backwardly, with the here proposed method, we will thus predict the tough- ness, K c ∼ √ EG a , based on the creep measurement. Indeed, all the introduced parameters can now be estimated, and we did so for twenty materials for which the creeping behaviour was studied in the literature [9,[17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]. The corresponding G to V curves and the inferred parameters values are shown in the supplementary material.…”

Section: Model Predictions Versus Reported Failuresmentioning

confidence: 99%

Thermal dissipation as both the strength and weakness of matter. A material failure prediction by monitoring creep

Vincent-Dospital,

Toussaint,

Cochard

et al. 2020

Preprint

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In any domain involving some stressed solids, that is, from seismology to general engineering, the strength of matter is a paramount feature to understand. We here discuss the ability of a simple thermally activated sub-critical model, that includes the auto-induced thermal evolution of cracks tips, to predict the catastrophic failure of a vast range of materials. It is in particular shown that the intrinsic surface energy barrier, for breaking the atomic bonds of many solids, can be easily deduced from the slow creeping dynamics of a crack. This intrinsic barrier is however higher than the macroscopic load threshold at which brittle matter brutally fails, possibly as a result of thermal activation and of a thermal weakening mechanism. We propose a novel method to compute the macroscopic critical energy release rate of rupture, Ga, solely from monitoring slow creep, and show that this reproduces the experimental values within 50% accuracy over twenty different materials, and over more than four decades of fracture energy.

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Section: Model Predictions Versus Reported Failuresmentioning

confidence: 99%

Thermal dissipation as both the strength and weakness of matter. A material failure prediction by monitoring creep

Vincent-Dospital,

Toussaint,

Cochard

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…For a reliable design, therefore, it is necessary to establish the factors controlling the rate of propagation of cracks by creep at components operating at elevated temperatures. Initially, linear elastic fracture mechanics concepts were applied for characterizing creep crack growth [9,10] but subsequently non-linear fracture mechanics techniques have been considered with varying degrees of success [11][12][13][14][15]. Although, correlation of creep crack growth rate, da/dt, in terms of stress intensity factor K in the forms of da/dt / K m have been obtained in particular circumstances, but widespread acceptance of this parameter has not been achieved.…”

Section: Introductionmentioning

confidence: 99%

The correlation between fracture mechanics parameters and creep crack growth rate of Al 7050-T73651 at elevated temperature

Abachi

Purazrang

2015

Engineering Fracture Mechanics

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Creep and Creep-Fatigue Crack Growth in Aluminium Alloys

Cited by 2 publications

References 20 publications

Thermal dissipation as both the strength and weakness of matter. A material failure prediction by monitoring creep

Thermal dissipation as both the strength and weakness of matter. A material failure prediction by monitoring creep

The correlation between fracture mechanics parameters and creep crack growth rate of Al 7050-T73651 at elevated temperature

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