Mechanics of interfaces : the stability of a spherical shape
نویسندگان
چکیده
2014 Conditions are considered for the loss of stability of a spherical interface. An arbitrary interface is characterized by the force factors, such as surface tension, first and second moments, moduli of elasticity and cutting forces. In a deformed state the conditions of internal interface equilibrium are assumed to be satisfied. General expressions are obtained for the stability criterion which relate the system parameters and the pressure drop between homogeneous phases separated by the interface. Particular cases are considered of a non-expansible membrane and an interface with a small expansion modulus of elasticity. J. Phys. France 51 (1990) 559-574 15 MARS 1990, 1 Classification Physics Abstracts 82.65D 87.20C
منابع مشابه
Analysis of Axisymmetric Extrusion Process through Dies of any Shape with General Shear Boundaries
In this paper, a generalized expression for the flow field in axisymmetric extrusion process is suggested to be valid for any dies and the boundary shapes of the plastic deformation zone. The general power terms are derived and the extrusion force is calculated by applying upper bound technique for a streamlined die shape and exponential functions for shear boundaries. It is shown that assuming...
متن کاملBuckling Analysis of Functionally Graded Shallow Spherical Shells Under External Hydrostatic Pressure
The aim of this paper is to determine the critical buckling load for simply supported thin shallow spherical shells made of functionally graded material (FGM) subjected to uniform external pressure. A metal-ceramic functionally graded (FG) shell with a power law distribution for volume fraction is considered, where its properties vary gradually through the shell thickness direction from pure me...
متن کاملNumerical simulation of effect of non-spherical particle shape and bed size on hydrodynamics of packed beds
Fluid flow has a fundamental role in the performance of packed bed reactors. Some related issues, such as pressure drop, are strongly affected by porosity, so non-spherical particles are used in industry for enhancement or creation of the desired porosity. In this study, the effects of particle shape, size, and porosity of the bed on the hydrodynamics of packed beds are investigated with three ...
متن کاملEffective Parameters in Contact Mechanic for Micro/nano Particle Manipulation Based on Atomic Force Microscopy
The effect of geometry and material of the Micro/Nano particle on contact mechanic for manipulation was studied in this work based on atomic force microscopy. Hertz contact model simulation for EpH biological micro particle with spherical, cylindrical, and circular crowned roller shape was used to investigate the effect of geometry on contact simulation process in manipulation. Then, to val...
متن کاملModeling and Simulation of Spherical and Cylindrical Contact Theories for Using in the Biological Nanoparticles Manipulation
The low Young's modulus of biological particles results in their large deformation against the AFM probe forces; therefore, it is necessary to study the contact mechanics of bioparticles in order to predict their mechanical behaviors. This paper specifically deals with the contact mechanics of DNA nanoparticles with spherical and cylindrical shapes during manipulation. In previous studies, ...
متن کامل