Effect of Biaxial Stresses on Crack Growth

Liu, AF; Allison, J. E.; Dittmer, DF; Yamane, JR

doi:10.1520/stp34903s

Cited by 16 publications

(11 citation statements)

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“…Nach Untersuchungen von Brown u. Miller [1165] an nichtrostendem Stahl des Typs AISI 316 wird die Rißfortschrittsrate bei niedriger bis mittlerer Beanspruchung vom Mehrachsigkeitsgrad k kaum beeinflußt, bei hoher Beanspruchung jedoch sehr wohl, Abb. Keinen Einfluß des Mehrachsigkeitsgrades stellen Liu et al [1173] an den Aluminiumlegierungen AA2024 und AA7075 fest. Die höchsten Rißfortschrittsraten treten bei k -1 auf, zu erklären aus der überproportional vergrößerten plastischen Zone an der Rißspitze bei hoher Grundbeanspruchung (durch Finite-Elemente-Berechnung nachgewiesen).…”

Section: Schwellenwert Bei Gemischtem Beanspruchungsmodusunclassified

Ermüdungsfestigkeit

2007

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Section: Schwellenwert Bei Gemischtem Beanspruchungsmodusunclassified

Ermüdungsfestigkeit

2007

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“…[12] [ 121 show that an inclined crack under an uniaxial tensile loading and a crack under a biaxial loading will turn to the plane perpendicular to the higher tensile load and the growth rate under a combined mode of crack tip field does not differ much from the "pure" mode I fatigue crack growth rate.…”

Section: Shear Fatigue Crack Growthmentioning

confidence: 99%

Shear Fatigue Crack Growth: A Literature Survey

Liu

1985

Fatigue Fract Eng Mat Struct

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A fatigue crack is often initiated by a localized cyclic plastic deformation in a crystal where the active slip plane coincides with the plane of maximum shear stress. Once a crack is initiated, the crack will propagate on the maximum shear plane for a while and, in the majority of the cases, will eventually change to the plane of the applied tensile stress.The "shear" and "tensile" modes of fatigue crack propagation are termed stage I and stage I1 fatigue crack growth. They are also known as mode I1 and mode I fatigue crack growth. However, the mechanism of the tensile mode fatigue crack propagation is shear in nature.Considerable progress has been made recently in the understanding of mode I1 fatigue crack growth. This paper reviews the various test methods and related data analyses.The combined mode I and mode I1 elastic crack tip stress field is reviewed. The development and the design of the compact shear specimen are described and the results of fatigue crack growth tests using the compact shear specimens are reviewed. The fatigue crack growth tests and the results of inclined cracks in tensile panels, center cracks in plates under biaxial loading, cracked beam specimens with combined bending and shear loading, center cracked panels and the double edge cracked plates under cyclic shear loading are reviewed and analyzed in detail.

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“…Other researchers, namely Liu rt a/. [47] and Truchon et a/. [48] claim that applied stress biaxiality has no effect.…”

Section: ( 5 )mentioning

confidence: 99%

The Behaviour of Fatigue Cracks Subject to Applied Biaxial Stress: A Review of Experimental Evidence

Smith

Pascoe

1983

Fatigue Fract Eng Mat Struct

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Experimental studies aimed at understanding the fatigue process in metals and polymers have usually been performed under uniaxial stress. Only in the last two decades or so has much experimentation been carried out on fatigue crack propagation under biaxial stress. This paper reviews the available published data. Crack propagation behaviour under biaxial stress is dictated by 3 parameters: stress biaxiality itself, which is defined here as the ratio of the in-plane principal stresses, crack angle with respect to the applied principal stress directions and stress intensity factor range. Depending on the first two parameters. cracks may grow in Mode I, Mode 11 or Mixed-Mode. Crack growth data have been presented using these three divisions. Two short sections have been included on initiation and cyclic stress/strain behaviour under biaxial stress to emphasise the fact that crack growth cannot be fully understood without knowing something of them. The accumulated data do not lead to adequate conclusions on either the qualitative or quantitative behaviour of cracks subject to cyclic in-plane biaxial stress. Reasons for the confusion and even contradiction of independent results are put forward and some discussion given to the possible directions of future experimental work.

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Effect of Biaxial Stresses on Crack Growth

Cited by 16 publications

References 0 publications

Ermüdungsfestigkeit

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Shear Fatigue Crack Growth: A Literature Survey

The Behaviour of Fatigue Cracks Subject to Applied Biaxial Stress: A Review of Experimental Evidence

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