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

Abdullah Dhayea Assi

doi:10.51173/jt.v2i4.259

Authors

Abdullah Dhayea Assi Institute of Technology / Baghdad, Middle Technical University, Baghdad, Iraq https://orcid.org/0000-0003-0869-8389

DOI:

https://doi.org/10.51173/jt.v2i4.259

Keywords:

Fatigue Crack Growth (FCG), AA (2219), Cyclic Stresses, MATLAB

Abstract

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.

Downloads

Download data is not yet available.

Author Biography

Abdullah Dhayea Assi, Institute of Technology / Baghdad, Middle Technical University, Baghdad, Iraq

References

N. Vikram and K. Raghuvir,“Review on Fatigue-Crack Growth and Finite Element Method.”International Journal of Scientific & Engineering Research 4 (4): 833–43 , 2013.

L.C. Singal, S. G. Rajwinder and M. J. Aishna, “Fatigue Mechanical Life Design-A Review.” International Journal of Engineering Research and General Science 5 (2): 247–51, 2017.

F. K. Fajdigag, “Numerical Analysis of Surface Fatigue Crack Groth Using FEM Method.” Int. Design Conf., 527–32, 2000.

A. B. Abdessalem, “Model selection, updating and prediction of fatigue crack propagation using nested sampling algorithm”, 23ème Congrès Français de Mécanique, Lille, 28 au 1er September 2017.

R. I. Stephens, "Metal Fatigue in Engineering", Second Edition, Aweiley- Interscience Publication, John Wiley and sons, INC, 2011.

A. Salmi & S. M. El-Amine, “Crack growth study under thermo-mechanical loads: parametric analysis for 2024 T3 aluminum alloy”, Vol 13 No 50 , October 2019.

I. Mudasir, O. Faisal,E. Hassan, U. Mudaser, E. Marco, B.Saeed & G. Paolo, “Effect of Natural Aging and Fatigue Crack Propagation Rate on Welded and Non-Welded Aluminum Alloy (AA2219-T87)”, Advances in Science and Technology Research Journal (ASTRJ), Volume 13, Issue 3, September 2019, pages 129–143.

L. Hongjun, G. Jian and L. Qinchuan,“Fatigue of Friction StirWelded Aluminum Alloy Joints”, Appl. Sci. 2018, 8, 2626; doi:10.3390/app8122626.

A. Haftirman, W. Haris , J. Andika, and N. A. Yahadi,” Effect of thickness on FCGof Aluminum alloys”, IOP Conf. Series: Materials Science and Engineering 343 (2018).

D.A. Abdullah & H. O. Salman " The effect of tempering on the fatigue Behavior for medium carbon steel", the Iraqi Journal For Mechanical and Material Engineering, Vol.11, No.4, 2011.

S.L. Sabater, Fundiciones ,SABATER FUNDIMOL,Catalogo,2004-2014.

D. A. Abdullah & H. J. Al-Alkawi, " Design Effect of The Welded Joints On Fatigue Strength For Low Carbon Steel Metal (ST- 52- 3) ", Engineering and Technology Journal,vol.25,No.1,2007, pp 9-23.

International Alloy Designation and Chemical Composition Limit for Wrought Aluminum and Wrought Aluminum, registration recorded series, pp3,2017.

O. A. Hatamleh ,"Laser and shot peening effects on fatigue crack growth in friction stir welded 7075-T7351 aluminum alloy joints", International journal of fatigue, Vol.29, No.3, pp. 434-421, 2007.

L. H. Al Najar, L. S. Al-Ansari, Mohammed Wahab Al-Jibory, "The Effect of Load Magnitude on Fatigue Life and Thermal Behavior of Notched Fatigue Specimen" , Journal of University of Babylon, Engineering Sciences, Vol.(26), No.(1): 2018.

D. Gross & S. Thomas, "Fracture Mechanics with an Introduction to Micromechanics”, Second Edition, Springer-Verlag Berlin Heidelberg 2011.