This paper describes a method for evaluating material properties of multi-layered system and functional gradient materials from data obtained from indentation testing. The measurement data collected from the penetration force-depth curves is employed for identifying elastic moduli of thin films and functional gradient materials. An axisymmetric indentation problem is first analyzed on the basis...

In this paper, free vibration analysis of a polymer-based nano-composite beam reinforced by boron-nitride nanotubes and subjected on elastic foundation, is studied. Smooth and defect-free nanotubes with uniform and directly- orientated in matrix are intended. Also, nanotubes’ distribution in the thickness direction of beam is regarded as a uniform distribution of the three different targeted on...

In this paper, the states of liquid drops sitting on a horizontal elastic cyclically stretched and then weakened substrate were studied experimentally. A thin rubber band was used as substrate, glycerin liquid. multi-branch hysteresis drop detected. The number branches in can be adjusted by changing time program for stretching–loosening tension.

Anisotropic elastic dipoles of oxygen vacancies interact with substrate-induced misfit strain in epitaxial oxide films. This interaction leads to specific spatial alignment the that facilitates coherent growth.

The electrical properties of graphene depend sensitively on the substrate. For example, recent measurements of epitaxial graphene on SiC show resistance arising from steps on the substrate. Here we calculate the deformation of graphene at substrate steps, and the resulting electrical resistance, over a wide range of step heights. The elastic deformations contribute only a very small resistance ...