A Fourier Series Solution to Bottom Roughness Induced Stresses During Pipe Laying
Often during installation, a subsea pipeline must be laid along seabed portions with rough profiles. The pipeline is forced by the bottom irregularities to bridge across consecutive protuberances....
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....
Microstructure and Mechanical Behaviour of Ice
Short descriptions are given for ice in nature, test methods used to evaluate their deformation behaviour and, a general microstructure-based constitutive equation. Equations suitable...
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...
Size Effects in the Fracture of Quasi-Brittle Materials
Causes and influences of the structural size effect that is exhibited by materials such as concrete, mortar, ice rock and ceramics, are discussed. The size effect law, which models this...
Some Questions on Fracture Mechanics of Ice and Ice Covers
Investigation of natural processes of deformation and fracture of ice covers, and processes of its interaction with icebreaker or ice-resistant structures requires as a rule considerations...
Effective Pressures Measured During Indentation Tests in Freshwater Ice
Indentation tests were conducted by pushing flat, vertical indentors of two different widths (50 and 100 mm) against the edges of floating, freshwater ice at different velocities (0.6-150...
Analysis and Design of Structures with Outrigger Arms
Although sophisticated computer methods are available for analyzing an entire building structure, there is a need for simplified methods (a) for checking the accuracy of the computer analyses,...
Mechanical Anisotropy of the Yucca Mountain Tuffs
Three series of measurements were performed on oriented cores of several Yucca Mountain tuffs to determine the importance of mechanical anisotropy in the intact rock. Outcrop and drillhole...
Application of Discrete Feature Analysis to Repository Characterization
Rock mass heterogeneity plays an important role in the hydrologic and mechanical behavior of radioactive waste repositories. This heterogeneity is, in turn, strongly influenced by the...
Fractal Characteristics of Fracture Roughness and Aperture Data
In this study mathematical expressions are developed for the characteristics of apertures between rough surfaces. It shown that the correlation between the opposite surfaces influences...
Design and Operating Criteria of the French Deep Repository for High Level Radioactive Waste
The design and operating criteria of the French geologic repository for high level radioactive waste (HLW) were selected for their contribution to operational and long-term safety, as...
A Probe Method for Measuring In Situ Rock Thermophysical Properties
The application of a thermal probe method for in situ thermophysical property measurement is analyzed. The REKA method (Rapid Evaluation of k and alpha) involves a single-borehole probe...
Correlation of Hydraulic Conductivity and Sonic Velocity in Water-Saturated Tuff
A laboratory study was conducted to investigate the correlation of hydraulic and sonic properties of water-saturated tuff. The hydraulic test used a new rock block testing machine, which...
Field Investigations for Seismic Effects on Mechanical and Geohydrologic Response of Underground Structures in Jointed Rock
An exploratory Seismic Rock Mechanics research program has been initiated by the U.S. Nuclear Regulatory Commission at the Center for Nuclear Waste Regulatory Analyses (CNWRA) to study...
Optimization of RC Frames with Reliability Concepts
Analysis and design optimization are considered simultaneously for reinforced concrete frames. Global displacements were considered as design variables. The nonlinear behavior of the elements...
Efficient Elements for Mindlin Beams and Plates
Two improvements to the conventional Mindlin two-node beam and three-node plate are presented. The first involves the order of the assumed displacement fields. The second involves simulation...
A Visualization Toolkit for Fluid Mechanics
The increasing complexity of both experimental and computational models in fluid mechanics requires innovative techniques for analysis and comprehension. Visual methods have been shown...
Finite Element Evaluation of Thermoviscoplastic Responses of Geomechanical Media Under Finite Deformation
Finite deformation responses of fluid-saturated geological media with thermoviscoplastic solid constituent are evaluated using finite element methods. The coupled nonlinear governing equations...
This note summarizes recent progress in developing h-p adaptive finite element methods for the numerical solution of the Navier-Stokes equations. A brief review of the h-p strategies and...
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