نتایج جستجو برای: surface stress theory

تعداد نتایج: 1791484  

2004
Qiao Lin Fukang Jiang Xuan-Qi Wang Yong Xu Zhigang Han Yu-Chong Tai James Lew Chih-Ming Ho

MEMS thermal shear-stress sensors exploit heat-transfer effects to measure the shear stress exerted by an air flow on its solid boundary, and have promising applications in aerodynamic control. Classical theory for conventional, macroscale thermal shear-stress sensors states that the rate of heat removed by the flow from the sensor is proportional to the 1/3-power of the shear stress. However, ...

Journal: :Physical review letters 2012
Hao Hu Miao Liu Z F Wang Junyi Zhu Dangxin Wu Hepeng Ding Zheng Liu Feng Liu

The concept of quantum electronic stress (QES) is introduced and formulated within density functional theory to elucidate extrinsic electronic effects on the stress state of solids and thin films in the absence of lattice strain. A formal expression of QES (σ(QE)) is derived in relation to deformation potential of electronic states (Ξ) and variation of electron density (Δn), σ(QE) = ΞΔn as a qu...

Journal: :The Journal of chemical physics 2004
Raj Ganesh S Pala Feng Liu

We demonstrate a model for determining the adsorptive and catalytic properties of strained metal surfaces based on linear elastic theory, using first-principles calculations of CO adsorption on Au and K surfaces and CO dissociation on Ru surface. The model involves a single calculation of the adsorption-induced surface stress on the unstrained metal surface, which determines quantitatively how ...

Journal: :E3S web of conferences 2021

Emotional labor is the process of regulating expressions and emotions to meet organizational goals, including surface performance deep performance. Based on psychological contract theory stress theory, this study investigates effect breach emotional mediating role job insecurity, which mediated by personality traits, effect.

2003
Yanick Ricard David Bercovici

S U M M A R Y Using a classical averaging approach, we derive a two-phase theory to describe the deformation of a porous material made of a matrix containing voids. The presence and evolution of surface energy at the interface between the solid matrix and voids is taken into account with non-equilibrium thermodynamic considerations that allow storage of deformational work as surface energy on g...

Journal: :Int. J. Math. Mathematical Sciences 2006
Moncef S. Aouadi

The theory of generalized thermoelastic diffusion, based on the theory of Lord and Shulman, is used to study the thermoelastic-diffusion interactions in an infinitely long solid cylinder subjected to a thermal shock on its surface which is in contact with a permeating substance. By means of the Laplace transform and numerical Laplace inversion the problem is solved. Numerical results predict fi...

In this paper, the vibration of microbeams due to a temperature pulse has been investigated. The thermoelastic coupled equations for microbeam resonator have been derived via the modified theory of couple stress in connection with the generalized thermoelasticity with relaxation time. The analytical expressions for studied fields due to modified couple stress for the microbeam have been obtaine...

2000
Toshiya Mori Mikio Kawasaki Toshihiko Sasaki Yukio Bose

X-ray methods were used to measure the residual stress near a fracture surface of a sintered composite system of A&03/ Sic. A specimen bent at three points with different notch radii was used to measure h-acture toughness. Effects of the notch radii on the stress intensity factor Kp were measured during the initiation of the crack. Experimental results agreed with fracture mechanics theory.

Journal: :Optics letters 2014
Alok Ji T V Raziman Jérémy Butet R P Sharma Olivier J F Martin

We develop a novel formalism to calculate the optical forces and torques on complex and realistic nanostructures by combining the surface integral equation (SIE) technique with Maxwell's stress tensor. The optical force is calculated directly on the scatterer surface from the currents obtained from the SIE, which does not require an additional surface to evaluate Maxwell's stress tensor; this i...

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