Size-dependent mechanical properties of axial and radial mixed AlN/GaN nanostructure
- Hoang, M-T
- Yvonnet, J.
- Mitrushchenkov, A.
- Chambaud, G.
- Duan, H. L.
DOIAbstract
In this paper, continuum multiscale models are proposed to describe the size-dependent mechanical properties of two kinds of heterogeneous nanostructures: radially heterogeneous nanowires and longitudinally heterogeneous nanolaminates. In both cases, the continuum models involve additional surface/interface energies, which allow capturing size effects. Several models of imperfect interface models, like coherent and spring-layer ones, are shown to respectively capture the size effects, which are reported by first-principles calculations performed on heterogeneous nanostructures. In each case, a procedure is proposed to identify the parameters of the surface/interface model in the continuum framework, based on first-principles calculations pe...
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