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An improved strain ...
An improved strain gradient plasticity formulation with energetic interfaces : theory and a fully implicit finite element formulation
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- Dahlberg, Carl F. O. (författare)
- KTH,Hållfasthetslära (Inst.)
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- Faleskog, Jonas (författare)
- KTH,Hållfasthetslära (Inst.)
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KTH Hållfasthetslära (Inst) (creator_code:org_t)
- 2012-06-21
- 2013
- Engelska.
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Ingår i: Computational Mechanics. - : Springer Science and Business Media LLC. - 0178-7675 .- 1432-0924. ; 51:5, s. 641-659
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- A fully implicit backward-Euler implementation of a higher order strain gradient plasticity theory is presented. A tangent operator consistent with the numerical update procedure is given. The implemented theory is a dissipative bulk formulation with energetic contribution from internal interface to model the behavior of material interfaces at small length scales. The implementation is tested by solving some examples that specifically highlight the numerics and the effect of using the energetic interfaces as higher order boundary conditions. Specifically, it is demonstrated that the energetic interface formulation is able to mimic a wide range of plastic strain conditions at internal boundaries. It is also shown that delayed micro-hard conditions may arise under certain circumstances such that an interface at first offers little constraints on plastic flow, but with increasing plastic deformation will develop and become a barrier to dislocation motion.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
Nyckelord
- Strain gradient plasticity
- Interface modeling
- Mixed order FE-elements
- Backward-Euler algorithm
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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