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Finite element implementation and numerical issues of strain gradient plasticity with application to metal matrix composites
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- Fredriksson, Per (author)
- KTH,Hållfasthetslära (Inst.)
-
- Gudmundson, Peter (author)
- KTH,Hållfasthetslära (Inst.)
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- Mikkelsen, Lars Pilgaard (author)
- Tech Univ Denmark, Risø Natl Lab Sustainable Energy, Mat Res Dept
- KTH Hållfasthetslära (Inst) (creator_code:org_t)
- Elsevier BV, 2009
- 2009
- English.
- In: International Journal of Solids and Structures. - : Elsevier BV. - 0020-7683 .- 1879-2146. ; 46:22-23, s. 3977-3987
- Journal article (peer-reviewed)
Abstract
Subject headings
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- A framework of finite element equations for strain gradient plasticity is presented. The theoretical framework requires plastic strain degrees of freedom in addition to displacements and a plane strain version is implemented into a commercial finite element code. A couple of different elements of quadrilateral type are examined and a few numerical issues are addressed related to these elements as well as to strain gradient plasticity theories in general. Numerical results are presented for an idealized cell model of a metal matrix composite under shear loading. It is shown that strengthening due to fiber size is captured but strengthening due to fiber shape is not. A few modelling aspects of this problem are discussed as well. An analytic solution is also presented which illustrates similarities to other theories.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering (hsv//eng)
Keyword
- Finite element method; Strain gradient plasticity; Metal matrix composites; Strengthening; Dislocations
- Engineering mechanics
- Teknisk mekanik
Publication and Content Type
- ref (subject category)
- art (subject category)
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