Effect of Band Overload on Fatigue Crack Growth Retardation

Saikia, Kaustav (2009) Effect of Band Overload on Fatigue Crack Growth Retardation. BTech thesis.

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Abstract

The present investigation studies the effects of a band overload (multiple overloads) on fatigue crack growth. It has been observed that a tensile overload tends to reduce the rate of a fatigue crack growth. The multiple-overloading, hence, is investigated for its effect on the fatigue crack growth. The specimen material is Aluminum 2024 T3 and a push-and-pull type servo-hydraulic fatigue testing machine INSTRON 8502 was being used to conduct the experiments. The crack growth was measured manually by the use of 1 mm graduations marked on the specimen itself. The notch was further sharpened with a jeweler’s saw. The specimen was being outsourced from HINDALCO. To study the effect of band overloads (multiple overloads), we applied overload cycles of 100, 10, 5 and 2. The graphs were being plotted and compared to that of data collected from single spike overloads.

Item Type:	Thesis (BTech)
Uncontrolled Keywords:	Fatigue,Overload,Band Overload,Multiple Overload,Al 2024 T3,INSTRON
Subjects:	Engineering and Technology > Mechanical Engineering > Structural Analysis
Divisions:	Engineering and Technology > Department of Mechanical Engineering
ID Code:	228
Deposited By:	Kaustav Saikia
Deposited On:	11 May 2009 22:21
Last Modified:	11 May 2009 22:21
Supervisor(s):	Ray, P K and Verma, B B