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Title: Simulations of micro and nanoindentations
Authors: Liu, Z.
Swaddiwudhipong, S. 
Pei, Q.
Keywords: C0 finite element
Indentation test
Molecular dynamics simulation
Size effect
Strain gradient plasticity
Issue Date: 2008
Citation: Liu, Z., Swaddiwudhipong, S., Pei, Q. (2008). Simulations of micro and nanoindentations. Journal of Mechanics of Materials and Structures 3 (10) : 1847-1856. ScholarBank@NUS Repository.
Abstract: The paper reviews recent research and developments on simulated indentation tests at micron and nanometer levels. For indentation at the maximum depth of several microns or hundreds of nanometer, classical continuum plasticity framework incorporating Taylor dislocation model via strain gradient plasticity embedded in the constitutive equation may be adopted to take care of the size effect. As higher-order stress components and higher-order continuity requirements can be made redundant, only C0 finite elements incorporating strain gradient plasticity have to be formulated. This results in the significant ease and convenience in finite element implementation requiring minimal additional computational effort and resources. Alternatively, when the indentation depth is lower at nanometer level, either a large scale molecular dynamics model or a hybrid finite element and molecular dynamics simulation has to be adopted. The article includes certain results from the former approach on nanoindentation based on combination of both Morse potential and embedded-atom model potential.
Source Title: Journal of Mechanics of Materials and Structures
ISSN: 15593959
DOI: 10.2140/jomms.2008.3.1847
Appears in Collections:Staff Publications

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