Effect of a new specimen size on fatigue crack growth behavior in thick-walled pressure vessels

Shariati, Mahmoud; Mohammadi, Ehsan; Nejad, Reza Masoudi

doi:10.1016/j.ijpvp.2016.12.009

Cited by 30 publications

(7 citation statements)

References 17 publications

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“…Among the numerous numerical methods available to solve problems, three of them can be named as the most well-known methods. With respect to emersion, these are the element free method (EFM), the boundary element method (BEM) [15][16][17][18][19][20] and the finite element method (FEM) [21][22][23][24][25][26][27], respectively. Abundant researches are performed in the field of evaluating the parameters affecting fatigue crack growth [28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

On fatigue life prediction of Al-alloy 2024 plates in riveted joints

et al. 2021

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The purpose of this paper is to numerically investigate the fatigue life and the fatigue crack growth path of 2024 aluminum plate riveted joints. For this purpose, according to field observations, the parameters affecting fatigue life are obtained. Relevant geometric parameters such as rivet shank length, hole diameter and dimensional tolerances, as well as the location pattern of the rivets and the material of the rivet joints are studied. In this study, modeling is performed to calculate the equivalent plastic strain using the finite element method. For this purpose, a three-dimensional elastoplastic model is used for simulation. The information obtained from the finite element method in this study made it possible to place the rivets in this type of joint for use in high safety structures such as the aerospace industry. Given the importance of the problem of crack growth in 2024 aluminum plates, having the geometrical and physical parameters of the problem, the goal is to achieve the exact path of crack growth and fatigue life of riveted joints. Fatigue crack growth simulation is performed on the samples using the boundary element method. The stress intensity factor for different loading modes is determined using the boundary element method. The results showed that the geometric parameters and the rivet material have a significant effect on fatigue cracking in aluminum plates.

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Section: Introductionmentioning

confidence: 99%

On fatigue life prediction of Al-alloy 2024 plates in riveted joints

et al. 2021

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“…It was demonstrated that fatigue and corrosion had a synergistic effect on crack growth. e methods and related factors were discussed to calculate fatigue crack growth [21][22][23][24]. Huang et al [25] conducted pre-corrosion fatigue tests on 7075-T6 aluminum alloy and analyzed correlated coefficients for corrosion cracks and cracks according to the Pearson method.…”

Section: Introductionmentioning

confidence: 99%

Effect of Alternate Corrosion and Fatigue on Fatigue Crack Growth Characterization of 2024-T4 Aluminum Alloy

Zhang

et al. 2020

Mathematical Problems in Engineering

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To investigate the effect of alternate corrosion and fatigue on fatigue crack growth characterization of 2024-T4 aluminum alloy, the pure fatigue test, “corrosion + fatigue” test (commonly known as pre-corrosion fatigue), and the “fatigue + corrosion + fatigue” alternating test of single-sided notched specimen of 2024-T4 aluminum alloy were carried out. The fatigue crack life of alternate corrosion and fatigue is longer than that of the pre-corrosion fatigue when the corrosion time is the same. And the more the times of alternating, the longer the crack growth life will be. This is mainly because the fatigue crack growth rate will change suddenly, which will have a certain hysteresis effect on the fatigue crack growth. The corrosion and fracture morphology characteristics of the alternate test were examined by scanning electron microscopy (SEM), and the composition of corrosion products was examined by the energy dispersion spectrum (EDS). The prediction model of fatigue crack growth rate considering the alternating hysteresis effect of corrosion and fatigue based on the Paris formula was established, and the parameters and precision of the model were calculated and verified. The results show that the model has certain engineering application value.

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“…Other related parameters involved in fatigue crack growth, such as initial crack angle and loading type, were studied in [22][23][24][25]. Concerning fatigue crack growth a ected by residual stresses in bandage wheels, Masoudi Nejad et al [26][27][28][29] investigated the fatigue crack growth and life estimation of railway bandage wheel a ected by contact stresses and heating residual stresses.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and fatigue fracture mechanism for a heavy-duty truck diesel engine crankshaft

Alilakbari

Imanparast

Nejad³

2018

Scientia Iranica

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The main goal of this research is the experimental and numerical study of the fatigue function and failure of the crankshaft of the diesel engine of a heavy truck. To this end, a crankshaft of the diesel engine of a heavy truck that underwent failure after traveling 955000 km was used. The crack developed from the third crankpin, leading to nal failure in the llet of the 4th crankpin. To investigate the roots of this failure, several experimental studies were carried out. Besides, by using a three-dimensional nite element method, the location of the maximum stress in the crankshaft was determined using \complete crankshaft model" and \one-crank model". The application of the results of stress analysis was the basis for the crack growth model and fatigue life estimation to determine the stress intensity factor and fatigue life considering the related parameters and boundary conditions. At the nal stage, by using the results obtained from the given model for the fatigue crack growth, comparing them with experimental results, and examining the whole process, it was concluded that the scratches in crankpin region were the main reason for the fatigue failure obtained from the bending-torsional load-combination.

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Effect of a new specimen size on fatigue crack growth behavior in thick-walled pressure vessels

Cited by 30 publications

References 17 publications

On fatigue life prediction of Al-alloy 2024 plates in riveted joints

On fatigue life prediction of Al-alloy 2024 plates in riveted joints

Effect of Alternate Corrosion and Fatigue on Fatigue Crack Growth Characterization of 2024-T4 Aluminum Alloy

Microstructure and fatigue fracture mechanism for a heavy-duty truck diesel engine crankshaft

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