You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.

    If you are an ASTM Compass Subscriber and this document is part of your subscription, you can access it for free at ASTM Compass

    Calculation of Spectrum Load Notch Root Crack Growth Rate Under Elastic and Inelastic Conditions

    Published: 01 January 1993

      Format Pages Price  
    PDF (276K) 15 $25   ADD TO CART
    Complete Source PDF (5.1M) 257 $78   ADD TO CART

    Cite this document

    X Add email address send
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word


    A hysteretic model of crack opening stress variation forms the basis for spectrum load notch fatigue crack growth analysis. The model is based on the observation of a significant difference between crack opening and crack closure stress, particularly under high stress-strain cycling. The two stress levels are controlled by the largest cycle in the load sequence. The analysis uses rainflow cycle count, constant amplitude long crack growth rate constants and cyclic stress-strain curve as inputs apart from closure data. Growth rate calculations for 6 mm thick L168 (2014-T651) Al-Cu alloy coupons under FALSTAFF load spectrum compare well with experimental data obtained on a long crack and at notch root crack depth ranging from under 50 microns to 2 mm.


    notch root fatigue, crack growth, crack closure and crack opening, spectrum loading, rainflow cycle count

    Author Information:

    Sunder, R
    National Aeronautical Laboratory, Bangalore,

    Prakash, RV
    Indian Institute of Science, Bangalore,

    Mitchenko, EI
    Institute for Strength Problems, Kiev,

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP15075S