This paper is concerned with the development of a piezoelectric d15 shear-induced torsion actuator made of a lead-free piezoceramic material exhibiting giant piezoelectric shear stress coefficient (e15) and piezoelectric transverse shear actuation force comparable to that of lead-based shear-mode piezoceramics. The Mn-modified 0.93(Na0.5Bi0.5TiO3)-0.07BaTiO3 (NBT-BT-Mn) composition exhibited ex...

BACKGROUND Regions in the vasculature exposed to steady laminar flow have a lower likelihood for atherosclerosis than regions exposed to disturbed flow with low shear stress. We previously found that laminar flow of short duration inhibited tumor necrosis factor (TNF)-alpha-mediated proinflammatory signaling in cultured endothelial cells (ECs). However, mechanisms responsible for the atheroprot...

This paper presents an application of a Higher Order Shear Deformation Theory (HOST 12) to problemof free vibration simply supported symmetric and antisymmetric angle-ply composite laminated plates.The theoretical model HOST12 presented incorporates laminate deformations which account for the effectsof transverse shear deformation, normal strain/stress nonlinear variation in-planedisplacements ...

Flanged shear walls are used extensively in moderate- and high-rise buildings to resist lateral loads induced by earthquakes. The seismic performance of many buildings is, therefore, closely linked to the behavior of the reinforced concrete walls. They must be carefully designed to provide not only adequate strength, but also sufficient ductility to avoid brittle failure under strong lateral lo...

Abstract The purpose of the experiment was to determine distribution shear stresses in measurement area a natural and modified wood sample. Previous tests conducted on typical Iosipescu specimen have shown that complex stress state exists at bottom notch. With transverse loading samples, flexure occurs normal arise from bending moment thus fibers are deformed. For investigations oriented shear,...

Free vibration of laminated composite shells with cutouts are presented by a nine noded curved C0 finite element (FE) formulation developed by authors based on higher order shear deformation theory (HSDT) using Sander's approximations. The proposed model satisfies parabolic distribution of transverse shear strains through the shell thickness and zero transverse shear stress conditions at shell ...

In this work, the least squares weighted residual method is used to solve the two-dimensional (2D) elasticity problem of a rectangular plate of in-plane dimensions 2a 2b subjected to parabolic edge tensile loads applied at the two edges x = a. The problem is expressed using Beltrami–Michell stress formulation. Airy’s stress function method is applied to the stress compatibility equation, and th...

The behavior of rigid spheroidal particles in a viscous flow is analysed using a vector spherical harmonics representation of the Stokes equation. This representation allows to clearly separate flow components associated with force, torque and stress. At the same time, it is possible to catalog forces and torques on particles in shear flows, in function of particle shape and shear characteristi...