A new Track of Fatigue crack growth in Aluminum Alloy (2219) under Cyclic Stresses

A study of new Track of Fatigue crack growth in aluminum alloy (2219) under cyclic stresses has been made. It was found out that this crack grow and propagate in three phases, the first phase though the grain size (micro-structure short cracks(MSC)), second phase cross the boundary of the grain siz...

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Main Author: Abdullah Dhayea Assi
Format: Article
Language:English
Published: middle technical university 2020-12-01
Series:Journal of Techniques
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Online Access:https://journal.mtu.edu.iq/index.php/MTU/article/view/259
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author Abdullah Dhayea Assi
author_facet Abdullah Dhayea Assi
author_sort Abdullah Dhayea Assi
collection DOAJ
description A study of new Track of Fatigue crack growth in aluminum alloy (2219) under cyclic stresses has been made. It was found out that this crack grow and propagate in three phases, the first phase though the grain size (micro-structure short cracks(MSC)), second phase cross the boundary of the grain size to about 1mm in length (physically short cracks (PSC)) and the third phase up to the final fracture (Length cracks(LC)).  In addition, two programs were designed on MATLAB to perform the compute calculations to collect the results. The first program to calculate the practical constants and the second to make the calculations required to complete the work schedules. The stress and the parameters effecting the growth of these cracks in each phase were studied. A model consisting of three formulas was established from the experimental results. Each formula describes the behavior of the cracks in the particular phase. The comparison showed that the proposed model is safer than the experimental results for the designed parts of aircraft.
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spelling doaj-art-4c8d697517a344d68eb6ffe41b086a9d2025-01-19T11:09:06Zengmiddle technical universityJournal of Techniques1818-653X2708-83832020-12-012410.51173/jt.v2i4.259A new Track of Fatigue crack growth in Aluminum Alloy (2219) under Cyclic StressesAbdullah Dhayea Assi0https://orcid.org/0000-0003-0869-8389Institute of Technology / Baghdad, Middle Technical University, Baghdad, Iraq A study of new Track of Fatigue crack growth in aluminum alloy (2219) under cyclic stresses has been made. It was found out that this crack grow and propagate in three phases, the first phase though the grain size (micro-structure short cracks(MSC)), second phase cross the boundary of the grain size to about 1mm in length (physically short cracks (PSC)) and the third phase up to the final fracture (Length cracks(LC)).  In addition, two programs were designed on MATLAB to perform the compute calculations to collect the results. The first program to calculate the practical constants and the second to make the calculations required to complete the work schedules. The stress and the parameters effecting the growth of these cracks in each phase were studied. A model consisting of three formulas was established from the experimental results. Each formula describes the behavior of the cracks in the particular phase. The comparison showed that the proposed model is safer than the experimental results for the designed parts of aircraft. https://journal.mtu.edu.iq/index.php/MTU/article/view/259Fatigue Crack Growth (FCG), AA (2219), Cyclic Stresses, MATLAB
spellingShingle Abdullah Dhayea Assi
A new Track of Fatigue crack growth in Aluminum Alloy (2219) under Cyclic Stresses
Journal of Techniques
Fatigue Crack Growth (FCG), AA (2219), Cyclic Stresses, MATLAB
title A new Track of Fatigue crack growth in Aluminum Alloy (2219) under Cyclic Stresses
title_full A new Track of Fatigue crack growth in Aluminum Alloy (2219) under Cyclic Stresses
title_fullStr A new Track of Fatigue crack growth in Aluminum Alloy (2219) under Cyclic Stresses
title_full_unstemmed A new Track of Fatigue crack growth in Aluminum Alloy (2219) under Cyclic Stresses
title_short A new Track of Fatigue crack growth in Aluminum Alloy (2219) under Cyclic Stresses
title_sort new track of fatigue crack growth in aluminum alloy 2219 under cyclic stresses
topic Fatigue Crack Growth (FCG), AA (2219), Cyclic Stresses, MATLAB
url https://journal.mtu.edu.iq/index.php/MTU/article/view/259
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