A phenomenological fatigue damage accumulation rule based on hardness increasing, for the 2024-T42 aluminum

Pavlou, Dimitrios G.

doi:10.1016/s0141-0296(02)00055-x

Cited by 82 publications

(79 citation statements)

References 10 publications

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“…aircraft structures) the failure of structural components is difficult to assess, particularly when the loading conditions are variable [1]. The prediction of the fatigue life of the specimens loaded under variable amplitude conditions is a complex subject [2].…”

Section: Introductionmentioning

confidence: 99%

Fatigue damage accumulation in aluminum 7050-T7451 alloy subjected to block programs loading under step-down sequence

Carvalho

Martins

Voorlwad³

2010

Procedia Engineering

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In this paper the fatigue damage accumulation under block program loading is investigated. Alternative flexion bending fatigue tests with a single change in stress amplitude are performed at room temperature for step-down sequence with two-step and threestep loading. The fatigue strength of aluminum 7050-T7451 alloy under block loading is investigated through comparison between the remaining cycles and consumed cycles ratios. The experimental results from the blocks loading fatigue tests are compared with the predictions using Miner's rule. It is shown that, two-step the fatigue strength is enhanced for smaller consumed fatigue loading and the cumulative fatigue damage calculated in accordance with the LDR, for three-step the fatigue strength occurs to a higher number of consume fatigue loading and the LDR rule trend to underestimate the fatigue life and the accumulative damage becomes higher than unity.

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Section: Introductionmentioning

confidence: 99%

Fatigue damage accumulation in aluminum 7050-T7451 alloy subjected to block programs loading under step-down sequence

Carvalho

Martins

Voorlwad³

2010

Procedia Engineering

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“…Although most of the nonlinear fatigue damage models improve the deficiencies within linear damage accumulation by considering additional loading effects, they are computationally expensive compared to linear damage accumulation [22][23][24][25] .…”

Section: Distribution Of Fatigue Life and Damagementioning

confidence: 99%

Stochastic fatigue life and reliability prediction based on residual strength

Zuo

Zhu

Gao

et al. 2015

J. Shanghai Jiaotong Univ. (Sci.)

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A randomized approach is developed to solve a deterministic equation. The method uses random deterministic approach to achieve the fatigue life based on residual strength and S-N curve. We propose a oneto-one transformation method to deduce the distribution of fatigue life from the residual strength. The proposed method is simple and effective, and can be used for fatigue life prediction. An example is given to illustrate how the method works.

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“…Residual life-predictions: Comparison of present model with published experimental data To validate the model of equation (11), it was compared with published data of Al-alloy 2024 (Aid et al, 2011;Pavlou, 2002), spheroidal graphite cast-iron (GS61) (Aid et al, 2011), and aluminum alloy 6082-T6 (Aid et al, 2011). Table 1 shows results of experimental and predicted life-fractions ( 2 ) for a two-level loading of Al-2024 alloy (Aid et al, 2011), for both low-to-high and high-to-low sequence.…”

Section: Scope Of Application Of New Damage Modelmentioning

confidence: 99%

“…Experimental results, Miner and Present model predicted life for Al-alloy 2024 for increasing loading amplitude(Aid et al, 2011;Pavlou, 2002) …”

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confidence: 92%

A fatigue driving stress approach to damage and life prediction under variable amplitude loading

Kwofie

Rahbar

2012

International Journal of Damage Mechanics

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A fatigue driving stress that causes fatigue damage is presented and used to predict residual fatigue life under variable loading. This fatigue driving stress is a function of the applied cyclic stress (), number of loading cycles (n), and the number of cycles to failure (N). It increases with loading cycles until the fatigue strength is reached when fracture occurs. By determining the equivalent number of cycles or life fraction at current load that yields the same fatigue driving stress as the previous loads, the remaining life can be predicted. A new damage model is derived as a function of expended life fraction of applied load, the logarithm life of applied load and the logarithm life of the initial applied load. The derived cumulative damage model indicates that P n i N i 4 1 for low-to-high loading sequence, and P n i N i 5 1, for high-to-low loading. In the case of constant amplitude loading, however, P n i N i ¼ 1. Life predictions from the present damage model and the Miner model are compared with experimental results from literature. The comparison shows that the present model presents a good estimation of the experimental data. Furthermore life prediction using the present model is found to give better agreement with experimental data than the popular Miner model.

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A phenomenological fatigue damage accumulation rule based on hardness increasing, for the 2024-T42 aluminum

Cited by 82 publications

References 10 publications

Fatigue damage accumulation in aluminum 7050-T7451 alloy subjected to block programs loading under step-down sequence

Fatigue damage accumulation in aluminum 7050-T7451 alloy subjected to block programs loading under step-down sequence

Stochastic fatigue life and reliability prediction based on residual strength

A fatigue driving stress approach to damage and life prediction under variable amplitude loading

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