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Publisher DOI: 10.1016/j.jmps.2018.01.007
Title: Modeling of surface effects in crystalline materials within the framework of gradient crystal plasticity
Language: English
Authors: Peng, Xiang-Long 
Husser, Edgar 
Huang, Gan-Yun 
Bargmann, Swantje 
Keywords: strain gradient;crystal plasticity;size effect;surface effects;surface yielding
Issue Date: 12-Jan-2018
Publisher: Elsevier
Source: Journal of the Mechanics and Physics of Solids (112): 508-522 (2018)
Journal or Series Name: Journal of the mechanics and physics of solids 
Abstract (english): A finite-deformation gradient crystal plasticity theory is developed, which takes into ac- count the interaction between dislocations and surfaces. The model captures both ener- getic and dissipative effects for surfaces penetrable by dislocations. By taking advantage of the principle of virtual power, the surface microscopic boundary equations are obtained naturally. Surface equations govern surface yielding and hardening. A thin film under shear deformation serves as a benchmark problem for validation of the proposed model. It is found that both energetic and dissipative surface effects significantly affect the plastic be- havior.
DOI: 10.15480/882.1745
ISSN: 0022-5096
Institute: Kontinuums- und Werkstoffmechanik M-15 
Type: (wissenschaftlicher) Artikel
License: CC BY 4.0 (Attribution) CC BY 4.0 (Attribution)
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