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Modeling of the mechanical behavior of interfaces by using strain gradient plasticity
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Solid Mechanics (Div.).ORCID iD: 0000-0002-9509-2811
2009 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH , 2009. , 20 p.
Series
Trita-HFL. Report / Royal Institute of Technology, Solid Mechanics, ISSN 1654-1472 ; 0476
Identifiers
URN: urn:nbn:se:kth:diva-11506OAI: oai:DiVA.org:kth-11506DiVA: diva2:277331
Presentation
2009-11-06, Sal E3, KTH, Osquars backe 14, Stockholm, 10:15 (English)
Opponent
Supervisors
Available from: 2009-11-17 Created: 2009-11-17 Last updated: 2013-01-15Bibliographically approved
List of papers
1. Hardening and softening mechanisms at decreasing microstructural length scales
Open this publication in new window or tab >>Hardening and softening mechanisms at decreasing microstructural length scales
2008 (English)In: Philosophical Magazine, ISSN 1478-6435, E-ISSN 1478-6443, Vol. 88, no 30-32, 3513-3525 p.Article in journal (Refereed) Published
Abstract [en]

A laminate structure with varying lamina thicknesses is used as a qualitative model of grain size dependence on yield behaviour in metallic materials. Both strain gradient plasticity and slip between layers are considered. It is shown that an inverse Hall-Petch effect can be generated in this way. For very small thicknesses, corresponding to very small grain sizes, sliding is the dominant mechanism and the strength then decreases with decreasing thickness. For larger thicknesses, strain gradient plasticity is controlling the deformation and the strength is, instead, increasing with decreasing thickness. Numerical examples are presented that demonstrate these mechanisms.

Keyword
Bulk/interface competition, Intergrain boundary sliding, Inverse Hall-Petch effect, Strain gradient plasticity
National Category
Engineering and Technology Applied Mechanics
Identifiers
urn:nbn:se:kth:diva-11503 (URN)10.1080/14786430802014688 (DOI)000261804000004 ()2-s2.0-57849154930 (Scopus ID)
Funder
Swedish Research Council, 621-2005-5759
Note

QC 20101007

Available from: 2009-11-17 Created: 2009-11-17 Last updated: 2017-12-12Bibliographically approved
2. Energetic interfaces and boundary sliding in strain gradient plasticity; investigation using an adaptive implicit finite element method
Open this publication in new window or tab >>Energetic interfaces and boundary sliding in strain gradient plasticity; investigation using an adaptive implicit finite element method
(English)Article in journal (Refereed) Submitted
Identifiers
urn:nbn:se:kth:diva-11504 (URN)
Note
QC 20101007Available from: 2009-11-17 Created: 2009-11-17 Last updated: 2011-11-18Bibliographically approved

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Dahlberg, Carl F. O.

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CiteExportLink to record
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