Reference : A hybrid smoothed extended finite element/level set method for modeling equilibrium s...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Multidisciplinary, general & others
Computational Sciences
http://hdl.handle.net/10993/11022
A hybrid smoothed extended finite element/level set method for modeling equilibrium shapes of nano-inhomogeneities
English
Zhao, X. [Department of Mechanical Engineering, Northwestern University, Evanston, 60208, United States]
Bordas, Stéphane mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Qu, J. [Department of Mechanical Engineering, Northwestern University, Evanston, 60208, United States, Department of Civil and Environmental Engineering, Northwestern University, Evanston, 60208, United States]
2013
Computational Mechanics
1-12
Yes (verified by ORBilu)
International
01787675
[en] Equilibrium shape ; Interface excess energy ; Level set method ; Smoothed extended finite element method ; Wachspress shape function
[en] Interfacial energy plays an important role in equilibrium morphologies of nanosized microstructures of solid materials due to the high interface-to-volume ratio, and can no longer be neglected as it does in conventional mechanics analysis. When designing nanodevices and to understand the behavior of materials at the nano-scale, this interfacial energy must therefore be taken into account. The present work develops an effective numerical approach by means of a hybrid smoothed extended finite element/level set method to model nanoscale inhomogeneities with interfacial energy effect, in which the finite element mesh can be completely independent of the interface geometry. The Gurtin-Murdoch surface elasticity model is used to account for the interface stress effect and the Wachspress interpolants are used for the first time to construct the shape functions in the smoothed extended finite element method. Selected numerical results are presented to study the accuracy and efficiency of the proposed method as well as the equilibrium shapes of misfit particles in elastic solids. The presented results compare very well with those obtained from theoretical solutions and experimental observations, and the computational efficiency of the method is shown to be superior to that of its most advanced competitor. © 2013 Springer-Verlag Berlin Heidelberg.
Researchers ; Professionals ; Students ; Others
http://hdl.handle.net/10993/11022
10.1007/s00466-013-0884-1
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