Fatigue crack growth behaviour of aluminium lithium alloy

Anandan, K and Dash, PK and Brahma, KK (1989) Fatigue crack growth behaviour of aluminium lithium alloy. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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    Abstract

    This document describes fatigue crack growth behaviour in Lital-A 8090 plate and sheet material under constant amplitude as well as spectrum loading. Effect of rolling direction, thickness, stress ratio, spectrum load truncation and omission level on crack growth were studied. Lital-A 8090-T851 plate material has significant anisotropy in crack growth behaviour under spectrum loading. No significant effect of plate thickness on crack growth was observed. Crack closure was shown to explain stress ratio effect. Higher truncation level lead to reduced growth rate at a given reference stress intensity. Crack closure level in spectrum load test was higher compared to constant amplitude closure level.

    Item Type: Proj.Doc/Technical Report (Technical Report)
    Uncontrolled Keywords: Fatigue crack growth;Crack closure;Constant amplitude spectrum loading;Truncation;G-level
    Subjects: CHEMISTRY AND MATERIALS > Metals and Metallic Materials
    CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
    Division/Department: Structures Division, Structures Division, Structures Division
    Depositing User: Ms Indrani V
    Date Deposited: 10 Aug 2006
    Last Modified: 25 Aug 2010 11:12
    URI: http://nal-ir.nal.res.in/id/eprint/1924

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