A New Method For Determining The Physical Parameters Of Large Soil And Rock Samples In Situ
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| Author | : Emmanuel E. Bliamptis |
| Publisher | : |
| Total Pages | : 36 |
| Release | : 1972 |
| Genre | : Correlation (Statistics) |
| ISBN | : |
A new method is introduced for determining the electrical and mechanical parameters of large samples of materials in situ. A set of linear electrodes in boreholes forms a square pattern; positive and negative electrical potentials on alternate electrodes create symmetry planes which define several 'cells'; a given fraction of electric current leaves an electrode and reaches a corresponding electrode. It is thus possible to obtain an impedance characteristic for each cell. The situation is basically two-dimensional, so a Schwarz-Christoffel transformation may be used followed with electrical calculations to obtain the conductivity and the permittivity of the cell material. The mechanical parameters of the cells are obtained in a similar manner. A mechanical disturbance is generated in the central borehole and the travel time to the other boreholes is measured along with the attenuation. The mechanical parameters are computed and correlated with the electrical parameters. (Author Modified Abstract).
| Author | : |
| Publisher | : |
| Total Pages | : 210 |
| Release | : 1972 |
| Genre | : Cosmic physics |
| ISBN | : |
| Author | : Air Force Cambridge Research Laboratories (U.S.) |
| Publisher | : |
| Total Pages | : 336 |
| Release | : 1972 |
| Genre | : Geophysics |
| ISBN | : |
| Author | : Emmanuel E. Bliamptis |
| Publisher | : |
| Total Pages | : 64 |
| Release | : 1975 |
| Genre | : Mathematical analysis |
| ISBN | : |
In-house and contractual research was conducted on the relationships between mechanical (strength) properties of rock and soil material and their electrical properties. A theoretical study involved the quantum electromagnetic and elastic interactions of crystals and solids. Laboratory and field investigations were made of the porosity and surface crack networks of large masses of quarry rocks, which govern their conductivity and permittivity. Thermal and mechanical stressing of rocks were analyzed. Electrical parameters of deep mine rocks were measured in-situ with emphasis on frequency/conductivity relationships. Direct mapping of rock strength as a function of electrical resistivity was investigated in the field. A three-dimensional modeling program was conducted in the laboratory. Field measurements of dynamic electrical conductivity of various earth materials were made under conditions of a rapid stress generated by high explosive setonations. Correlations demonstrated by this geophysical and geological research can be useful in prediction or evaluation of nuclear weapon shock effects on military installations.
| Author | : |
| Publisher | : Jeffrey Frank Jones |
| Total Pages | : 8380 |
| Release | : |
| Genre | : |
| ISBN | : |
Over 8,300 pages .... Just a SAMPLE of the CONTENTS: NONDESTRUCTIVE INSPECTION METHODS. Published by the Departments of the Army, Navy and Air Force on 1 March 2000 - 771 pages and June 2005 - 762 pages; Metallic Materials and Elements for Aerospace Vehicle Structures 1,733 pages Designing and Developing Maintainable Products and Systems - Revision A 719 pages Sampling Procedures and Tables for Inspection by Attributes 75 pages Nondestructive Testing Acceptance Criteria 88 pages Environmental Stress Screening Process for Electronic Equipment 49 pages Handbook for Reliability Test Methods, Plans, and Environments for Engineering, Development, Qualification, and Production - Revision A 411 pages Human Engineering - Revision F 219 pages Sampling Procedures and Tables for Life and Reliability Testing (Based on Exponential Distribution) 77 pages Test Method Standard: Electronic and Electrical Component Parts 191 pages Reliability Testing for Engineering Development, Qualification and Production - Revision D 47 pages Electroexplosive Subsystem Safety Requirements and Test Methods for Space Systems (150 pages, 8.64 MB) Reliability Prediction of Electronic Equipment- Notice F 205 pages Reliability Program for Systems and Equipment Development and Production - Revision B 88 pages Electronic Discharge Control Handbook for Protection of Electrical and Electronic Parts, Assemblies and Equipment (Excluding Electrically Initiated Explosive Devices) - Revision B 171 pages Electrical Grounding for Aircraft Safety 290 pages Fuze and Fuze Components, Environmental and Performance Tests for - Revision C 295 pages Requirements for the Control of Electromagnetic Interference Characteristics of Subsystems and Equipment - Revision E 253 pages Maintainability Verification/Demonstration/Evaluation - Revision A 64 pages Failure Rate Sampling Plans and Procedures - Revision C 41 pages Maintainability Prediction 176 pages Definition of Terms for Reliability and Maintainability - Revision C 18 pages Semiconductor Devices 730 pages Reliability Modeling and Prediction - Revision B 85 pages Established Reliability and High Reliability Qualified Products List (QPL) Systems For Electrical, Electronic, and Fiber Optic Parts Specifications - Revision F 17 pages Environmental Test Methods and Engineering Guidelines 416 pages) Test Methods for Electrical Connectors - Revision A 129 pages Environmental Engineering Considerations and Laboratory Tests - Revision F 539 pages System Safety Program Requirements 117 pages Test Method Standard Microcircuits - Revision E 705 pages Test Method Standard Microcircuits - Revision F 708 pages Procedures for Performing a Failure Mode Effects and Criticality Analysis - Revision A 54 pages
| Author | : |
| Publisher | : |
| Total Pages | : 64 |
| Release | : 1975 |
| Genre | : Geophysics |
| ISBN | : |
| Author | : Air Force Cambridge Research Laboratories (U.S.) |
| Publisher | : |
| Total Pages | : 224 |
| Release | : 1973 |
| Genre | : Bibliographical literature |
| ISBN | : |
This bibliography lists all AFCRL in-house reports, journal articles, and contractor reports from 1 January top 31 March 1973.
| Author | : |
| Publisher | : |
| Total Pages | : 80 |
| Release | : 1977 |
| Genre | : Geology |
| ISBN | : |
| Author | : |
| Publisher | : |
| Total Pages | : 222 |
| Release | : 1968 |
| Genre | : Earth sciences |
| ISBN | : |
Issues for Jan. 1968- include section called Geocom supplement, GS1-.
| Author | : E. E. Bliamptis |
| Publisher | : |
| Total Pages | : 36 |
| Release | : 1972 |
| Genre | : Correlation (Statistics) |
| ISBN | : |
A new method is introduced for determining the electrical and mechanical parameters of large samples of materials in situ. A set of linear electrodes in boreholes forms a square pattern; positive and negative electrical potentials on alternate electrodes create symmetry planes which define several 'cells'; a given fraction of electric current leaves an electrode and reaches a corresponding electrode. It is thus possible to obtain an impedance characteristic for each cell. The situation is basically two-dimensional, so a Schwarz-Christoffel transformation may be used followed with electrical calculations to obtain the conductivity and the permittivity of the cell material. The mechanical parameters of the cells are obtained in a similar manner. A mechanical disturbance is generated in the central borehole and the travel time to the other boreholes is measured along with the attenuation. The mechanical parameters are computed and correlated with the electrical parameters. (Author Modified Abstract)
