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
    Volume 46, Issue 5 (May 2018)

    Effect of Impact Energy in ESSO Test (Part 2: Proposal of Validity Criteria of Impact Condition in ESSO Test by FEM Crack Propagation Analysis

    (Received 10 March 2017; accepted 22 August 2017)

    Published Online: 02 May 2018

    CODEN: JTEVAB

      Format Pages Price  
    PDF (1.45 MB) 17 $25   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

    Based on the fundamental knowledge revealed in Part 1 of the present work, crack propagation analysis is carried out in Part 2 of the present work to the establish validity criteria for impact conditions. In cases where there is excessive impact energy in a brittle fracture test in the evaluation of crack arrest toughness, the impact energy gives conservative test results. In this research, numerical simulation was systematically conducted in order to clarify the effects of impact energy. Dynamic elastic finite element method Finite Element Method (FEM) analysis, which was validated by actual dynamic strain data in Part 1, was employed. The FEM analysis revealed that the impact effect reached its maximum immediately after impact and gradually decreased thereafter. However, the increase of the dynamic stress intensity factor Kd, with respect to the impact, remains significant in cases where applied stress is low and impact energy is high. The judgment of whether the impact had an effect on the results was made by calculating the ratio of the values of Kd both for cases where impact was considered and where it was not. The threshold condition from which the evaluated value should be corrected was set to 1.5. The specified range could be determined without considering the effect of impact by using the dimensionless ratio of the quantity impact energy Ei/(Es + Et).

    Author Information:

    Kaneko, Masahito
    Plate Products Development Section, Plate Products Development Department R&D Laboratory, Iron & Steel Business, Kobe Steel, LTD., Kakogawa, Hyogo

    Kawabata, Tomoya
    Department of Systems Innovation Graduate School of Engineering, The University of Tokyo, Bunkyo, Tokyo

    Aihara, Shuji
    Department of Systems Innovation Graduate School of Engineering, The University of Tokyo, Bunkyo, Tokyo


    Stock #: JTE20170151

    ISSN:0090-3973

    DOI: 10.1520/JTE20170151

    Author
    Title Effect of Impact Energy in ESSO Test (Part 2: Proposal of Validity Criteria of Impact Condition in ESSO Test by FEM Crack Propagation Analysis
    Symposium ,
    Committee E08