The effect of deposition conditions on characteristic mechanical properties – elastic modulus and hardness – of low-temperature PECVD silicon nitrides is investigated using nanoindentation. It is found that increase in substrate temperature, increase in plasma power and decrease in chamber gas pressure all result in increases in elastic modulus and hardness. Strong correlations between the mech...

In this work the novel method to create PDMS substrates with continuous and discrete elasticity gradients of different shapes and dimensions over the large areas was introduced. Elastic properties of the sample were traced using force spectroscopy (FS) and quantitative imaging (QI) mode of atomic force microscopy (AFM). Then, fluorescence microscopy was applied to investigate the effect of elas...

• First-time study of periodic traveling waves in a taut cable resting on bilinear substrate. The problem is studied both with and without an external distributed load. Conditions for existence are obtained analytical expressions the wave shape given. Extensive numerical simulations performed to confirm solutions. stability analyzed analytically numerically novel point this work. propagation se...

In this study, we first demonstrate that the J-integral in classical linear elasticity becomes path-dependent when the solid is subjected to combined electrical, chemical and mechanical loadings. We then construct an electro-chemo-mechanical J-integral that is path-independent under such combined multiple driving forces. Further, we show that this electro-chemo-mechanical J-integral represents ...

An analytical model is developed to deduce the elastic and plastic properties of a hemispherical inclusion embedded in surface semi-infinite solid from its indentation response. The differs approaches presented literature by starting expressions for elasto-plastic responses homogeneous solids, adapting them replacing modulus an effective inclusion. accuracy established comparing results with de...

polymer-clay nano-composite materials, in which nano-meter thick layers of clay dispersed in polymer matrix, have generally higher mechanical properties than normal polymeric materials. a new three-dimensional unit cell model has been developed for modeling three constituent phases including inclusion, interphase and matrix. the total elastic modulus of nano-composite is evaluated.  numerical r...

Abstract Purpose The importance of mechanical forces and microenvironment in guiding cellular behavior has been widely accepted. Together with the extracellular matrix (ECM), epithelial cells form a highly connected system subjected to various cues from their environment, such as ECM stiffness, tensile compressive forces. stiffness linked many pathologies, including tumor formation. However, ou...