Structural Engineering and Mechanics

  • 제4권6호
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  • Pages.645-653
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  • 1996
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Modelling of strain localization in a large strain context

  • Cescotto, S. (M.S.M Department, University of Liege) ;
  • Li, X.K. (National Laboratory for Structural Analysis of Industrial Equipments, Dalian University of Technology)
  • 발행 : 1996.11.25
⟨ 이전 논문 다음 논문 ⟩

초록

In order to avoid pathological mesh dependency in finite element modelling of strain localization, an isotropic elasto-plastic model with a yield function depending on the Laplacian of the equivalent plastic strain is implemented in a 4-node quadrilateral finite element with one integration point based on a mixed formulation derived from Hu-Washizu principle. The evaluation of the Laplacian is based on a least square polynomial approximation of the equivalent plastic strain around each integration point. This non local approach allows to satisfy exactly the consistency condition at each integration point. Some examples are treated to illustrate the effectiveness of the method.

키워드

참고문헌

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피인용 문헌

  1. A mixed element method in gradient plasticity for pressure dependent materials and modelling of strain localization vol.144, pp.3-4, 1997, https://doi.org/10.1016/S0045-7825(96)01175-9
  2. The use of hat-shaped specimens to study the high strain rate shear behaviour of Ti–6Al–4V vol.37, pp.6, 2010, https://doi.org/10.1016/j.ijimpeng.2009.08.002