DEFORMATION CHARACTERISTICS OF A COMPACTED CLAY IN COLLAPSE UNDER ISOTROPIC STRESS STATE AND ITS SHEAR DEFORMATION AFTER COLLAPSE

Electrically-induced bubble deformation, translation and collapse

Abstract In this work, the behaviour of a gas bubble in a low Mach number, weakly viscous dielectric liquid under the action of a spatially-uniform electric field is considered. Using domain perturbation analysis and assuming any shape deformation of the bubble or induced translation to be small, but placing no such restriction on the volume oscillations, appropriate equations to second order i...

Plastic collapse of lattice structures under a general stress state

We present a numerical minimization procedure to determine the macroscopic ‘plastic collapse strength’ of a tessellated cellular structure under a general stress state. The method is illustrated with sample cellular structures of regular and hierarchical honeycombs. Based on the deformation modes found by minimization of plastic dissipation, closed-form expressions for strength are derived. The...

Erythrocyte deformation under shear flow.

A Static Flexure of Thick Isotropic Plates Using Trigonometric Shear Deformation Theory

A Trigonometric Shear Deformation Theory (TSDT) for the analysis of isotropic plate, taking into account transverse shear deformation effect as well as transverse normal strain effect, is presented. The theory presented herein is built upon the classical plate theory. In this displacement-based, trigonometric shear deformation theory, the in-plane displacement field uses sinusoidal function in ...

Deformation and collapse of microtubules on the nanometer scale.

We probe the local mechanical properties of microtubules at the nanometer scale by radial indentation with a scanning force microscope tip. We find a linear elastic regime that can be described by both thin-shell theory and finite element methods, in which microtubules are modeled as hollow tubes. We also find a nonlinear regime and catastrophic collapse of the microtubules under large loads. T...