A phase-field ductile fracture model with a variable regularization length parameter

DOI Open Access

Bibliographic Information

Other Title
  • 可変正則化パラメータを用いた phase-field 延性破壊モデル

Description

<p>In the last decade, one of the gradient damage models called “phase-field fracture model” has been receiving attention. The model for brittle fractures has acquired great success, but that for ductile fractures is still under development. In this context, we propose a novel phase-field model with a variable regularization length parameter that is defined as an increasing function of the measure of the plastic strain. Since the regularization length parameter l representing the width of a diffuse crack is known to determine the damaged region around the crack, it has been modified so as to increase depending on the amount of plastic deformation. Thanks to this variable regularization length parameter l ∗, the phase-field parameter d is calculated in consideration of the damage due to plastic deformation. The conventional elasto-plastic model with J2 theory in plasticity is employed and couple to our proposed phase-field model. Several numerical examples are conducted to demonstrate the capability of our proposed model and validate the introduction of l ∗ in comparison with the experimental result.</p>

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Details 詳細情報について

  • CRID
    1390848250104057472
  • NII Article ID
    130007831725
  • DOI
    10.11421/jsces.2020.20200005
  • ISSN
    13478826
    13449443
  • Text Lang
    ja
  • Article Type
    journal article
  • Data Source
    • JaLC
    • CiNii Articles
    • KAKEN
  • Abstract License Flag
    Disallowed

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