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

    An Overview and Discussion of Basic Methodology for Fatigue

    Published: 01 January 2000

      Format Pages Price  
    PDF (600K) 34 $25   ADD TO CART
    Complete Source PDF (12M) 546 $325   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


    This paper broadly reviews the stress-based, strain-based, and crack growth aproaches to fatigue life prediction, and it attempts to suggest some choices and variations of these that might enhance their inclusion in undergraduate education and their more routine use by practicing engineers. For the stress-based approach, emphasis should shift toward the use of data on actual components, and it should be recognized that damage below the usual fatigue limit may occur. Also, evaluation of mean stress effects by the modified Goodman diagram should be replaced by other methods. The usefulness of the strain-based approach for simple situations may be extended by adding empirical adjustments for surface finish and size. It may also be desirable to lower the long-life end of the strain-life curve to obtain agreement with limited component test data, producing a component-specific strain-life curve. Use of the crack growth approach is hampered by the lack of a widely accepted set of materials constants for describing da/dN versus ΔK curves. It is recommended that this situation be remedied by representing the intermediate growth rate region with a Paris-type exponent, an associated coefficient, and a third constant that characterizes the sensitivity to R-ratio according to the equation of Walker. Limits or asymptotic behavior for the low and high growth rate regions should then be handled separately.


    stress, strain, crack growth, fatigue of materials, life prediction, testing, mean stress, S-N, curves, strain-life curves, da/dN, versus Δ, K, curves

    Author Information:

    Dowling, NE
    Professor and associate professor, Virginia Tech, Blacksburg, VA

    Thangjitham, S
    Professor and associate professor, Virginia Tech, Blacksburg, VA

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP14791S