Variation in Fatigue Crack Growth due to the Geometrical and Loading Effects

Beden, S. M. and Abdullah, S. and Ariffin, A. K. and Al-Asady, N. A. (2009) Variation in Fatigue Crack Growth due to the Geometrical and Loading Effects. Engineering e-Transaction , 4 (1). pp. 1-6. ISSN 1823-6379

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The problem of crack growth is a major issue in the prediction and maintenance of aerospace structures, as well as other structural elements in mechanical engineering. Fatigue crack growth as consequence of service loads depends on many different contributing factors. Due to the number and complexity of the mechanisms involved in the fatigue crack growth problem, no universal solution exists yet and there is no general agreement among researchers for any of the available models. Most of the results reported are dealing with geometry with some factors separately. This paper simulates the factors affecting the fatigue crack growth of metallic materials under cyclic loading. For the simulation purpose, three points bend (TPB) with span to width ratio 8:1 and compact tension (CT) specimen geometries were used. There are many factors affecting the fatigue crack growth in structures, such as initial crack length, stress ratio, aspect ratio and type of geometry. The behavior of such cases is shown using Forman model. The fatigue crack growth obtained from the two geometries was compared. Different values of these factors showed different effects on the fatigue crack growth. For further study need to validate the modelling procedure with experimental work as well as take into account the other factors such as; other types of geometries with fatigue crack models and environmental effects towards a universal solution.

Item Type: Article
Uncontrolled Keywords: Cyclic loading, Factors; Fatigue crack growth model; Geometry; Simulation.
Subjects: T Technology > TJ Mechanical engineering and machinery
Date Deposited: 31 Jul 2013 02:57
Last Modified: 31 Jul 2013 02:57

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