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  • Users: Jnnal
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  1. Jnnal

    Hi, As per the document "Fatigue

    Hi, As per the document "Fatigue evaluation of wing and associated structure on small airplanes. Federal Aviation Administration Rept. DOT-FAA-AFS-120-73-2, Washington DC, 1973.", The total fatigue damage calculation involves Gust, Maneuver, Landing and Taxi and also GAG cycle. In GAG cycle is...
  2. Jnnal

    Scatter factor as per AC 23-13 A

    Hi, as per AC 23-13 A, Eq.4 provides a scatter factor to account for the statistical variability inherent in the fatigue performance of built-up structures. As per the same, the standard deviation to be used for high strength steels like one used in landing gear are to be 25% and, the scatter...
  3. Jnnal

    Hi, Recently, I was reading through

    Hi, Recently, I was reading through AC23-13A. The exceedance curves are normalized with Incremental Design Limit Maneuver Load Factor at Maximum Gross Weight (anLff) to get Incremental Maneuver Load Factor at Operating Weight (an). What is the meaning here of the word incremental in anlff? Is...
  4. Jnnal

    Fatigue life calculation - aircraft components - scatter factor and S-N curves

    Hi, I am started to work in the area of aircraft fatigue life estimation and please help me with the following: I have few questions regarding fatigue life estimation of metallic aircraft components. Let say, The life can be computed using S-N curves (from MMPDS) and Miners damage under given...

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