# Neural Network Modeling of the Mechanical Behavior of Sand

*Given a set of triaxial test data, an artificial neural network (ANN) has been trained to model the mechanical behavior of a medium-to-fine sand. Once trained, the ANN was tested by simulating...*

Computer Simulation of Direct Shear Test

*This paper presents a pilot study of a computer simulation of direct shear test on sands using the Discrete Element Method. The numerical test setup is described first, which is followed...*

Improved Time-History Analysis for Structural Dynamics Calculations

*Methods are developed to reduce the computational effort in time-history analysis of nonlinear structures. The methods permit use of much larger time intervals than are possible in conventional...*

Wave Induced Vortex Near Seashore

*The vortex motion behind submerged breakwaters in the nearshore region is studied. The RCPWAVE model (Ebersole et al., 1986) is used to calculate the wave field and thus the radiator stresses...*

Nonlinear Geometric and Material Considerations in Shell Structures

*A geometrically and materially nonlinear static shell theory allowing large displacements, rotations, and strains with parabolic shear is developed. The theory is cast into a total Lagrangian...*

Stress Wave Interaction in Finite Beam on Elastic Foundation

*The short-time behavior of a finite Timeshenko beam on a Winkler foundation subjected to step and impulse loadings is presented. The transient behavior was analyzed by using the method...*

Flexible Plates for Control of Stress Distribution

*Use of a flexible plate in minimization of soil reaction concentrations at the edge was analyzed. The analysis utilizes a solution for vertical vibrations of the circular flexible plate...*

Shear Flow Between Walls in Relative Motion

*The paper reports on experiments on Couette flow, i.e., the shear-induced flow between surfaces which are in motion relative to each other. The novel aspect of the work is the appearance...*

The Theory of Elasticity: 1950-1992 and Beyond: Concluding Remarks

*Forty years ago the theory of elasticity could be completely characterized by A.E.H.Love in his monumental treatise as an effort to reduce to calculation the internal state of stress produced...*

Harmonic Excitation of an Unconstrained Saturated Particle Bed

*Past research on the flow of concentrated cohensinless mixtures have historically emphasized steady or quasi-steady motions while dynamic effects have received little attention in comparison....*

Postbuckling Behavior of Stiffened Composite Shell Panels

*The paper summarizes the current status of an ongoing study on the postbuckling behavior of thick and moderately thick composite stiffened shells. Axially compressed moderately thick panels...*

Leakage Characteristics of the St. Jude Heart Valve

*The requirement for anticoagulant therapy in patients implanted with mechanical heart valve prostheses is well known. A plausible explanation for this requirement is that the leakage flow...*

Intra Vena Cava Balloon Pumping

*An innovative prototype intravenous hollow-fiber oxygenator was developed in 1984 by B.G. Hattler. The device consisted of a microporous, hollow-fiber membrane oxygenator inserted into...*

An Evaluation Study of Modified Mohr-Coulomb and Cap Models

*Two failure criteria, namely Mohr-Coulomb and cap models, are considered in this paper with some modifications. Mohr-Coulomb theory is applied to concrete after stress and strain cut-offs...*

The Effective Stress Path for Soil at High Pressure

*The effect of increasing stiffness in the soil skeleton on the effective stress path in undrained triaxial compression tests is experimentally examined and found to not be significant....*

Constitutive Equation for Granular Material by Hypoelasticity

*Constitutive equations for soil based upon the incremental theory of hypoelasticity are proposed in this paper to account for the stress path dependency and dilatant behavior of soil....*

A Sphere Moving Down an Inclined Bumpy Surface

*A sphere moving down a bumpy incline in the air is studied theoretically and experimentally. A method based on the principle of energy conservation is used to express the average velocity...*

Stochastic Mixed Finite Difference Method

*Some aspects of numerical solutions of stochastic mechanics problems are considered. The Finite Difference method for discretization of stochastic continuous media problems is discussed....*

Shear Resistance Models for Concrete Bridges

*Statistical models are developed for the shear resistance of concrete bridge girders. Two structural types are considered: reinforced concrete T-beams and prestressed concrete AASHTO girders....*

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...*

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