Crack tip dislocations and its shielding effect

Masaki Tanaka, Yumi Hoshino, Alexander Hartmaier, Kenji Higashida

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Two dimensional simulations of discrete dislocation dynamics were carried out to clarify a shielding effect due to dislocations at a crack tip. The configuration of dislocations around the crack tip was calculated under the conditions of mode I tensile load at high temperatures. The stress field around the crack tip due to dislocations was found to be compressive, accommodating mode I stress intensity at the crack tip. In order to experimentally confirm the stress accommodation, infrared photoelastic observation was also performed in a specimen pre-deformed at high temperatures. The experimental result is in good agreement with a simulated infrared photoelastic image derived from the stress field calculated.

    Original languageEnglish
    Title of host publicationSelected, peer reviewed papers from The Sixth Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6
    Pages1833-1836
    Number of pages4
    EditionPART 3
    Publication statusPublished - Dec 1 2007
    Event6th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6 - Jeju, Korea, Republic of
    Duration: Nov 5 2007Nov 9 2007

    Publication series

    NameMaterials Science Forum
    NumberPART 3
    Volume561-565
    ISSN (Print)0255-5476

    Other

    Other6th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6
    Country/TerritoryKorea, Republic of
    CityJeju
    Period11/5/0711/9/07

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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