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
    STP1256

    An Experimental Study of CTOD for Mode I/Mode II Stable Crack Growth in Thin 2024-T3 Aluminum Specimens

    Published: 01 January 1995


      Format Pages Price  
    PDF (328K) 16 $25   ADD TO CART
    Complete Source PDF (17M) 834 $109   ADD TO CART

    Cite this document

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


    Abstract

    An experimental study of crack tip opening displacement (CTOD) for Mode I/Mode II stable crack growth in thin sheet 2024-T3 aluminum has been conducted. To perform the experiments, an Arcan specimen and fixture was modified so that (1) slippage in the grips was eliminated, (2) large rotations of the fixture components were achievable and (3) bending stresses were minimized. Defining Θ to be the angle between the Mode I loading direction (perpendicular to the crack line) and the direction of applied loading, experimental results indicate that (a) for large amounts of crack extension, a ≥ 10 mm, the value of CTOD at 1 mm behind the crack tip appears to approach a constant value of 0.1 mm for all modes of loading, (b) the direction of crack extension varied with applied mixed mode loading, (c) Mode I crack extension is predominant for 0° ≤ Θ ≤ 60°, (d) Mode II crack extension is predominant for 75° ≤ θ ≤ 90° and (e) a transition zone exists for angles θ near 75°.

    Keywords:

    Mode I/II, stable crack growth, cracks, CTOD, aluminum alloy, fracture


    Author Information:

    Amstutz, BE
    Graduate Student, University of South Carolina, Columbia, SC

    Sutton, MA
    Professor, University of South Carolina, Columbia, SC

    Dawicke, DS
    Senior Research Scientist, AS&M, Hampton, VA

    Newman, JC
    Senior Research Scientist, NASA-Langley Research Center, Hampton, VA


    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP16388S