A multi-scale approach to crack growth

Jones, Rhys; Barter, Simon; Molent, L.; Pitt, Susan

doi:10.1007/978-1-4020-5062-6_10

Cited by 6 publications

(3 citation statements)

References 43 publications

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“… Comparison between the IFDL and 7050‐T7451 at R = 0.1 for various thicknesses. The experimental data for were taken from 32 . All the static mechanical properties were taken from 29 .…”

Section: The Multiple Similitude Stagesmentioning

confidence: 99%

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Fatigue damage discrepancies, the intrinsic fatigue damage map locus and the multiple stages of the similitude concept

Rodopoulos

2010

Fatigue Fract Eng Mat Struct

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A B S T R A C TThe work demonstrates how the theory of the fatigue damage map (FDM) can be used in order to define a closed form locus where fatigue crack growth can be sought. The Intrinsic FDM Locus depending only on readily material properties represents a tool able to accurately predict crack growth of polycrystals. If the Locus is expressed in terms of a surface plot after triangulation of the data, it concludes into visualization of the potential for multiple similitude stages. The stages are defined as a function of the maximum far field stress and K. Multiple similitude stages are found to dominate the short and near threshold area (Stage I growth) and represent direct result of the effect of polycrystalline behaviour to flow resistance. The work concludes that interrogation of the points defining the Intrinsic FDM Locus and related to the three thresholds can provide potential characteristics in the quest for an ideal damage tolerance material.Keywords fatigue damage map; fatigue damage map locus; fatigue life reliability; fatigue property; fatigue threshold; grain size. N O M E N C L A T U R Eb = Burger's vector D = average grain size E = elastic modulus G = shear modulus K Ic = fracture toughness plane strain m i /m 1 = grain orientation factor R = stress ratio R C = stage I intensification factor S = stiffness modulus α = crack length K = stress intensity factor range σ c y = cyclic yield stress σ max FL(R=−1) = maximum value of the fatigue limit, R = −1

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“… Comparison between the IFDL and 7050‐T7451 at R = 0.1 for various thicknesses. The experimental data for were taken from 32 . All the static mechanical properties were taken from 29 .…”

Section: The Multiple Similitude Stagesmentioning

confidence: 99%

“…The experimental data for were taken from. 32 All the static mechanical properties were taken from. 29 The plane stress-strain three threshold points coincide in terms of K .…”

Section: Transition From Steady-state Crack Growth or Stage II To Unsmentioning

confidence: 99%

Fatigue damage discrepancies, the intrinsic fatigue damage map locus and the multiple stages of the similitude concept

Rodopoulos

2010

Fatigue Fract Eng Mat Struct

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“…2 However, the work of Frost and Dugdale, 3 which predated that of Paris et al, 1 reported that crack growth under constant amplitude loading could be described via a simple log linear relationship. References [4][5][6][7][8][9][10][11] have extended the Frost-Dugdale law so as to apply to a wide range of practical engineering problems under both constant and variable amplitude loading. In the early 1970s Elber 12 introduced the concept of plasticity induced crack closure.…”

mentioning

confidence: 99%