Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 14 of 14 for “"Geologic Materials"”.
-
The experimental investigation of the inelastic behavior of geologic materials
A knowledge of the mechanical behavior of geologic materials (rocks and minerals) has become increasingly important in mining and civil engineering, geology, geophysics and more recently in a number of defense and aerospace fields. This research describes an investigation of one particular aspect …
-
A nonlinear viscoplastic double yield surface constitutive model for geologic materials
A new constitutive model is proposed to describe the stress-strain-time behaviour of clays and organic soils. This approach is based on the framework of overstress viscoplastic theory and can be applied to any elastoplastic (inviscid) model.The most innovative idea of the proposed model is the …
-
The Generation and Management of Museum-Centered Geologic Materials and Information
… a much-needed system for effectively managing geological collections. The lack of effective organization and management of collections can result in a serious problem: not only is history lost, but so is the potential for collection of further data from documented samples using newer analytical …
-
Interfacial polarization in membranes and its significance in the induced polarization of geologic materials
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Geology, 1959.
-
Determination of geologic materials by thermal inertia mapping within the Raft River test site, Cassia County, Idaho
Includes bibliographical references.
-
Novel Application of Nondestructive Testing to Evaluate Anomalous Conditions in Drilled Shafts and the Geologic Materials Underlying Their Excavations
Drilled shafts are deep foundation elements created by excavating cylindrical shafts into the ground and filling them with concrete. Given the types of structures they support, failure to meet their performance criteria can jeopardize public safety and cause severe financial losses. Consequently, …
-
The Evolution of the Profile Paradigm in the History of Pedology and Quaternary Geology: Concepts and Applications
… exist worldwide in all terranes where fresh geologic materials are exposed at the earth surface and become modified by pedogenic processes; they are the evidence for land surfaces throughout the geologic record. The PWP concept should be useful in disciplines that, in reality, have …
-
Echoed Sites and the Unknowable Object
… from the ground without reflecting on the geologic history of the site. In <em>echoed sites</em> I create sculptures with and without a geologic site or object, by way of digital technology. These forms display two states paradoxically in balance, where what’s presented leaves more …
-
Testing and constitutive modelling of saturated interfaces in dynamic soil-structure interaction.
… of saturated interfaces between structural and geologic materials and joints in rock, subjected to cyclic loading is important for safe and improved analysis and design of many geotechnical structures. Appropriate testing is vital for the determination of parameters in constitutive models to …
-
Meaning, measurement, and field application of fully softened shear strength of stiff clays and clay shales
… normally consolidated specimens prepared from 71 materials, including soft to stiff clays, clay shales, mudstones, and clay minerals, were also collected and compared to the empirical correlation for fully softened shear strength developed in the present study. An examination was made for the …
-
Class III / short line system inventory to determine 286,000 lb (129,844 kg) railcar operational status in Kansas and determination of ballast fouling using ground penetrating radar
… for one week. Sand was chosen as an absorbent geologic material for the second stage of testing since no fouled ballast could be acquired at the time of the study. A 27 x18 x 18 in (0.69 x 0.46 x 0.046 m) box was filled with sand and wetted with water in one gallon (7.5 L) increments. GPR scans …
-
Pore-scale Study of Flow and Transport in Energy Georeservoirs
… processes associated with multiphase flow in geologic materials and provides insight into upscaling methodologies that account for the influence of pore-scale processes in core- and larger-scale modeling frameworks. During reservoir depletion processes, reservoir formation damage is an issue …
-
Diffusion of helium isotopes in silicate glasses and minerals : implications for petrogenesis and geochronology
Helium mobility in geologic materials is a fundamental constraint on the petrogenetic origins of helium isotopic variability and on the application of radiogenic and cosmogenic helium geochronology. 3He and 4He volume diffusivities determined at 25-600°C in basaltic glasses by incremental-heating …
-
Developments in large scale discrete element simulations with polyhedral particles
… ago to account for such discontinuity in the materials, and since then significant algorithmic developments have been made to enhance the performance of DEM. Nevertheless, DEM is still a computationally expensive method to simulate granular materials. This research focuses on the developments …