Fatigue failure of aircraft components

Bhaumik, SK and Reddy, AV (2010) Fatigue failure of aircraft components. In: International Winter School on Advances in Aeronautical Materials and Technologies, 15-19, Dec 2010, Hyderabad, India.

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    Abstract

    Failures can be broadly classified into two categories, those involving fracture and those without fracture. Each of these categories can be classified depending upon whether they are caused by thermal, mechanical or chemical influences. Mechanical failures are further studied considering the nature of forces, whether they are by monotonic or repetitive loads. Aircraft components are inevitably subjected to fluctuating stresses and hence, irrespective of the mechanism of defect/crack initiation, most of these components ultimately fail by fatigue fracture. Despite the fact that most engineers and designers are aware of fatigue, and that a vast amount of experimental data has been generated on the fatigue properties of various metallic and non-metallic materials, fatigue failures of engineering components are still common. Study showed that majority of service failures in aircraft components occur by fatigue and it amounts to about 60% of the total failures (Table 1). A number of factors influence the fatigue life of a component in service, viz., (i) complex stress cycles, (ii) engineering design, (iii) manufacturing and inspection, (iv) service conditions and environment and (v) material of construction (Fig.1). Analysis shows that premature fatigue crack initiation in the components can be attributed to defects of various types introduced mostly inadvertently in various stages of component manufacture, maintenance, inspection, operation etc.

    Item Type: Conference or Workshop Item (Paper)
    Uncontrolled Keywords: Aircraft components;Mechanical failure;Fatigue failure
    Subjects: AERONAUTICS > Aeronautics (General)
    CHEMISTRY AND MATERIALS > Metals and Metallic Materials
    Division/Department: Materials Science Division, Materials Science Division
    Depositing User: Ms. Alphones Mary
    Date Deposited: 25 Jan 2011 15:58
    Last Modified: 27 Jan 2011 14:53
    URI: http://nal-ir.nal.res.in/id/eprint/9150

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