Certain Issues in Variable Amplitude Fatigue

Ranganathan, N.

doi:10.1016/j.proeng.2015.02.049

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…The aforementioned case is often observed for aluminium alloys and is reported in the studies mentioned below. An insignificant effect of overloads on crack growth rates occurred in aluminium alloys such as 2024-T3 [12], 7075 and 8090 [13] under an aircraft service spectrum as well as in seven other aerospace aluminium alloys [14]. The phenomenon found confirmation on the plots of crack growth rates also for 2524-T3 Alclad aluminium sheets and in titanium alloys [15] subject to the Embraer simulated service operation.…”

Section: Introductionmentioning

confidence: 95%

Archive of Mechanical Engineering

Bogdanowicz,

Kocańda,

Torzewski

2020

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The present paper investigates the effects of variable-amplitude loads on fatigue crack growth rates for the 2024-T3 aluminium alloy on the basis of microfractographic analyses and its capacity to reconstruct load-time histories of failed components. For this purpose, there were applied three different variable-amplitude load sequences with single and multiple overloads and underloads. Subsequently, images of fatigue striations on components' fracture surfaces were examined. The aforementioned loads were employed when simulating fatigue crack behaviour in aeronautical alloys.

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Section: Introductionmentioning

confidence: 95%

Archive of Mechanical Engineering

Bogdanowicz,

Kocańda,

Torzewski

2020

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“…Based on known characteristics of material, geometry and loading, calculated values of a crack growth rate using different models (Elber, Modified Elber, Schijve and Modified Schijve) are shown in Figure 4. At the same figures all predicted curves for crack growth rate are compared with experimental data 14 .…”

Section: Example 1a: Crack Growth Rate Prediction Of Ct Specimen Subj...mentioning

confidence: 99%

Improved computation method in residual life estimation of structural components

Maksimović

Maksimović²

2013

Theor appl mech (Belgr)

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This work considers the numerical computation methods and procedures for the fatigue crack growth predicting of cracked notched structural components. Computation method is based on fatigue life prediction using the strain energy density approach. Based on the strain energy density (SED) theory, a fatigue crack growth model is developed to predict the lifetime of fatigue crack growth for single or mixed mode cracks. The model is based on an equation expressed in terms of low cycle fatigue parameters. Attention is focused on crack growth analysis of structural components under variable amplitude loads. Crack growth is largely influenced by the effect of the plastic zone at the front of the crack. To obtain efficient computation model plasticity-induced crack closure phenomenon is considered during fatigue crack growth. The use of the strain energy density method is efficient for fatigue crack growth prediction under cyclic loading in damaged structural components. Strain energy density method is easy for engineering applications since it does not require any additional determination of fatigue parameters (those would need to be separately determined for fatigue crack propagation phase), and low cyclic fatigue parameters are used instead. Accurate determination of fatigue crack closure has been a complex task for years. The influence of this phenomenon can be considered by means of experimental and numerical methods. Both of these models are considered. Finite element analysis (FEA) has been shown to be a powerful and useful tool1,6 to analyze crack growth and crack closure effects. Computation results are compared with available experimental results. [Projekat Ministarstva nauke Republike Srbije, br. OI 174001]

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