Analysis of Soil-Stress Cell Interaction
Static loading experiments conducted on a soil stress cell embedded in a sand are presented. Stress cell performance was evaluated by comparing the indicated stress against the expected...
On the Constitutive Behavior of Single Ice Crystals Due to Dislocation Mechanisms
A three-dimensional constitutive relation is derived for single ice crystals. The formulation is developed in terms of dislocation processes on the basal, prism, and pyramidal planes....
Visco-elasticity and the Compressive Failure of Polycrystalline Ice
The analysis of the visco-elasticity of polycrystalline ice is addressed. Experimental results on isotropic and anisotropic polycrystalline ice are presented, which indicate that intracrystalline...
Anelastic Straining in Polycrystalline Ice
This paper presents experimental observations on the influence of stress, grain size and total strain level on the magnitude of anelastic strain in granular freshwater ice. Cyclic loading...
Fractal Crushing
This paper develops an approach to a two-dimensional fragmentation process, in which floating ice floes are driven against each other and break up into smaller floes. It first considers...
Effect of Grain Size Variation on Damage in Polycrystalline Ice
This paper studies the effect of grain size distributions on damage accumulation in polycrystalline ice under uniaxial compression. The numerical results are derived from the internal-variable...
Fracture Resistance to Cracking in Ice: Initiation and Growth
The issue of notch sensitivity and brittleness of the test failure is used to forecast the necessary specimen size for a material property initiation toughness; a methodology is developed...
Laboratory Observations of Macroscopic Failure Modes in Freshwater Ice
A review is presented of tests performed in the laboratory by several investigators on indentation in freshwater ice. A number of the observed failure modes are discussed. From the results,...
Modeling of Floating Ice Sheets
Rectangular finite elements are studied and their suitability to investigate behavior of floating ice sheets is discussed. A simple model of the plate on one parameter, Wrinkler type,...
Loads and Vibration Induced by Compressive Failure of Ice
In earlier work, attention was focussed on the narrow length of crushed ice adjacent to the structure, which was seen as the seat of vibration associated with ice crushing. Crushed ice...
Application of Ice/Structure Interaction Concepts to a Real Time Ice Risk Assessment Computer Model
The successful and safe operation of an Arctic offshore exploration structure greatly depends on the implementation of alerts procedures. In order to assess alerts levels, a computer model...
Wang's Equation for Ice Forces From a Pressure Ridge
Yung-shih (Tony) Wang has presented an equation for the breaking loads from a multiyear pressure ridge on a conical structure. The three distances that define the position of the plastic...
Snow Transport as a Function of Wind Speed and Height
When limitations are placed on mass flux in the saltation layer, a regression equation relating mass flux to wind speed and height above surface, developed by Mellor and Fellers (1986),...
Recommended Cold Regions Meteorological Instrumentation
For nearly 30 years, CRREL has studied environmental conditions in winter weather. These efforts have concentrated on providing field-measured meteorological data and historical climatological...
Tomorrow's Toll Road
Techniques using automatic vehicle identification (AVI) currently provide the most efficient form of electronic toll collection. Several systems have been installed in the U.S. in the...
Houston Moves Forward Again
The National Transportation Plan, as released by Transportation Secretary Samuel Skinner, advocates the construction of toll roads and calls on local governments to devise and finance...
Structural Renovation of Tall Chimneys
This paper describes several tall chimney projects where major renovations were performed to the linings which required complete structural analysis of the existing chimney and foundation....
Modeling in Support of Hanford Site Waste Management
The waste management practices for both radioactive and hazardous wastes at the Hanford Site are designed to comply with all applicable state and federal regulations. Results from numerical...
Procedure for Seismic Evaluation and Design of Small Bore Piping
Simplified methods for the seismic design for small bore piping in nuclear power plants have been used for many years. Various pipe designers have developed unique methods to treat the...
Optimization Models for Acid Rain Control
A series of related optimization formulations are presented for developing and analyzing acid rain control strategies. These models span a wide array of approaches and reflect a similarly...
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