Composites of concentric cylinders can fail by microcracks that span the thickness and length of one cylinder but arrest at the boundary to adjacent cylinders. This failure mode was analyzed by developing a new polar shear-lag analysis for stresses in a cross section of a concentric-cylinder composite. The analysis can accurately calculate stresses in each cylinder in the presence of microcrack...

Several stress analysis methods were used to find the energy release rate for initiation of an interfacial crack in a microbond specimen. First, we used a recently derived variational mechanics analysis of the stresses in a microbond specimen. Previous studies for analysis of crack growth have used shear-lag methods. For a second analysis, we present a new, and more complete, shear-lag analysis...

Compressive failure by splitting is studied herein via an analytical model. The use of a shear lag model to determine the stress state at the crack tip and the modeling of the region away from the crack tip by the 3D elasticity equations leads to a simple analytical expression is used to determine the compliance changes for both unsteady crack growth as well as steady state crack growth under c...

The present paper sheds some light on investigating the effect of pulsatility on flow through a tapered artery. Blood has been represented by a nonNewtonian fluid obeying Herschel-Bulkley equation. Using the Reynolds number as the perturbation parameter, a perturbation technique is adopted to solve the resulting quasi-steady non-linear coupled implicit system of differential equations. Analytic...

A series of numerical simulations of tropical cyclones in idealized large-scale environments is performed to examine the effects of vertical wind shear on the structure and intensity of hurricanes. The simulations are performed using the nonhydrostatic Pennsylvania State University–National Center for Atmospheric Research fifth-generation Mesoscale Model using a 5-km fine mesh and fully explici...

In this paper, the authors used finite element method to investigate longitudinal and transverse shear lag effects effect of aspect ratio on double-chamber cantilever concrete box girder under uniform distributed load. The results show that root section is positive lag, mid-span negative lag. direction, changes appear in girder. at fixed end significantly affected by ratio, degree different par...

The aim objective of this study is to investigate the effects of near-field earthquakes on the response of mid-rise buildings with tubular structure.  For this purpose, a 20-story building with a square plan of six by six bays, all with 6 m span, and story height of 3.70 m is considered.  Axial force of columns, shear lag, and inter-story drift values are used as the main response parameters. N...