Effect of stress cycle asymmetry on fatigue crack growth

Klesnil, M.; Lukáš, P.

doi:10.1016/0025-5416(72)90038-9

Cited by 214 publications

(50 citation statements)

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“…Figure 2 shows the variation of the values of AKg with R for each material obtained when no growth was detected after lo7 cycles. Using the relation put forward by Klesnil and Lukas [7] and ignoring stress history effects, their equation can be reduced to:…”

Section: Air Testsmentioning

confidence: 99%

Slow Fatigue Crack Growth and Threshold Behaviour in Air and Vacuum of Commercial Aluminium Alloys

Kirby

Beevers

1979

Fatigue Fract Eng Mat Struct

114

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Abstract-Fatigue crack growth and threshold behaviour have been examined in three commercial aluminium alloys in both air and vacuum environments. It was observed that, in air, the threshold stress intensity range AK,,, varied linearly with the R ratio. In contrast AK, in vacuum was found to be independent of R. Over the whole growth rate range examined fatigue crack growth in vacuum was AK controlled and failure occurred by a dimple and ductile striation mechanism. This also applied to failure in the intermediate growth rate ranges in air. However, at slow growth rates in air, fatigue crack growth was structure sensitive and crystallographic facets were formed during the crack propagation process.

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Section: Air Testsmentioning

confidence: 99%

Slow Fatigue Crack Growth and Threshold Behaviour in Air and Vacuum of Commercial Aluminium Alloys

Kirby

Beevers

1979

Fatigue Fract Eng Mat Struct

114

View full text Add to dashboard Cite

show abstract

“…The value of K , can be regarded as being the plane strain fracture toughness K,,, a material property, the calculation of which is well defined and which is independent of load, specimen configuration, etc. However, the same is not true of A K T , which has been shown to vary according to loading conditions [6,7]. Thus the value of AKT is not simply defined and needs to be determined for each type of fatigue loading considered.…”

mentioning

confidence: 99%