Pressure Losses Across Sequential Stenoses in Collapsible Tubing
The fluid dynamics of a model of a diseased artery with multiple stenoses were investigated in a recirculating steady-flow system over a range of Reynolds numbers (Re) from 30 to 1100....
Pulmonary Artery Velocity Profiles in Young Lambs
This report describes progress made in our laboratory in examining pulmonary artery velocity patterns in normally maturing lambs. Lambs from four age groups were selected for study--2...
Flow in a Model Symmetric Bifurcation
Flow through bifurcations is of particular interst to the field of hemodynamics and respiration dynamics. In this paper flow through a model symmetric bifurcation is studied experimentally...
Fluid Dynamics at the Carotid Bifurcation
Arterial wall distensibility is believed to be of secondary importance to the general flowfield of the human carotid artery. However, it has been reported that it may have greater influence...
Lumped Parameter Model for the Dynamics of the Pulmonary Circulation
The pulmonary circulation is a low pressure system such that respiration has an important effect on pulmonary hemodynamics and has to be taken into account when predicting its behavior....
A Cumulative Failure Criterion of Concrete Under Uniaxial Dynamic Compressive Loading
It has been previously reported that the strength and critical strain of concrete under impact increase with strain rate, but neither of them can predict failure. A cumulative damage parameter...
The Generalized Brazier Problem for Orthotropic Straight Tubes of Finite Length
A new engineering approach, based upon a mixed variational functional, is presented for the analysis of the nonlinear static behavior of thin-walled, circular-cross-section cylindrical...
Crushing Response of Energy Absorbing Composite Structure
A description of why and how composite structures crush and absorb energy is presented. The three primary crushing modes of composite structure (transverse shearing, lamina bending and...
Reduced Basis Technique for Nonlinear Vibrations of Composite Panels
A reduced basis technique and a computational procedure are developed for the nonlinear free vibrations of composite panels. The computational procedure can be conveniently divided into...
Experimental Investigation of Bending and Twisting Coupling in Thin-Walled Composite Beams
The behavior of a thin-walled ppen section composite material beam depends on the anisotropic mechanical properties of the panels that form the beam. A beam theory has been proposed for...
A Discussion of the Numerical Modeling of Sea Ice Ridging
Pressure ridging, is the failure mechanism of the Arctic pack ice in compression. The large-scale compressive strength of the ice pack is determined by the aggregate of ridge building...
Erosion of Steep River Banks and Time Evolution Towards Equilibrium Channel Shape
A numerical analysis of the time evolution of straight river channels is presented. The bed and bank, material is taken to be coarse, non-cohesive and uniform in size. As a result of the...
Stability of Systems of Rigid Bodies by Bounding Theorems
The stability of systems of systems of rigid bodies subjected to conservative and dissipative forces is investigated by considering the minimization of a work function subject to the kinematic...
Predicting the Performance Limits of Soil-Culvert Systems
A finite element model for elastic plastic large deformation analysis of soil-culvert systems is presented. Predictions of this numerical model are in good agreement with failure tests...
Finite Element Large Deflection Analysis of Cylindrical Shells with Different Types of Cutouts
Nonlinear finite element is used to find the elastic buckling load and the maximum deflection for cylindrical shells subjected to unsymmetrical pressures due to wind. These shells are...
Inflation Instability of Cylindrical Membranes
A new procedure which investigates inflation instability of cylindrical nonlinear membranes is developed. The general characteristics of inflation instability are described. An efficient...
Nonlinear Eigensolver for Exact Vibration Analysis
Vibration analysis of structural systems is concerned with accurately predicting the free vibration modes and frequencies of the vibrating system. This analysis process involves two general...
Eigenproperties of a Twisted, Nonuniform Rotating Beam by the Finite Element Method
A initially twisted blade with nonuniform properties along the length, is rotating with constant angular velocity about an axis perpendicular to it's elastic axis. The blade is modeled...
An Expert System for Impeller Mechanical Design and Analysis
Impeller is the most critical component of centrifugal compressors. The mechanical efficiency and durability of the impeller determines the performance of the compressors. The shapes and...
Modal Analysis of Vibration Response for Condition Monitoring of Structures
The response of a structure to load is evidence of what the structure is; of the materials, members, connections and form of the structure. Response is evidence as well of the condition...
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