Threshold crack growth and crack closure in ductile iron

Prakash, Raghu V and Brahma, KK and Srinivasan, MN (1990) Threshold crack growth and crack closure in ductile iron. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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    Abstract

    This document describes the fatigue threshold crack growth13; behaviour of ferritic ductile iron tested at stress ratios ranging between 0.1 and 0.5 . Automated K-decreasing testing was employed for the determination of threshold stress intensities . Crack closure stress estimates were made based on the P-COD curves obtained during testing . Based on this study, it was inferred that the threshold crack growth in this material is not strongly influenced by the applied stress ratio ; crack closure could explain the stress ratio effect.

    Item Type: Proj.Doc/Technical Report (Technical Report)
    Uncontrolled Keywords: Threshold crack growth;Ferritic ductile iron;Stress ratio13; effect;K-decreasing testing;Crack mouth opening displacement gage;Crack closure stress
    Subjects: AERONAUTICS > Aeronautics (General)
    Division/Department: Other, Structures Division, Other
    Depositing User: Poornima Narayana
    Date Deposited: 02 Aug 2006
    Last Modified: 24 May 2010 09:47
    URI: http://nal-ir.nal.res.in/id/eprint/2347

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