Investigation of Gage-placement Effects on a Stress Gage Embedded in Grout

Investigation of Gage-placement Effects on a Stress Gage Embedded in Grout
Author: John Qua Ehrgott (Jr.)
Publisher:
Total Pages: 100
Release: 1973
Genre: Grout (Mortar)
ISBN:
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The report documents a study conducted on the Gulf Radiation Technology (GRT) piezoelectric stress gage in support of the Diamond Mine Event at the Nevada Test Site (NTS). The gage was first calibrated in oil and then embedded in an NTS grout and tested under conditions of uniaxial strain. The results of these tests indicated a slightly nonlinear output of the gage under hydrostatic loadings and an under registration of the gage when embedded in the grout. Limited uniaxial strain tests were concurrently conducted on the grout mix. The property information from these tests was used as input to the WESTES finite element code in which the test boundary conditions were simulated to analytically investigate behavior of the grout specimen with and without an embedded inclusion or gage. The calculated results indicated that the contact interface between the gage and the grout had the greatest effect on gage performance. (Author).

Nuclear Science Abstracts

Nuclear Science Abstracts
Author:
Publisher:
Total Pages: 648
Release: 1974
Genre: Nuclear energy
ISBN:
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NSA is a comprehensive collection of international nuclear science and technology literature for the period 1948 through 1976, pre-dating the prestigious INIS database, which began in 1970. NSA existed as a printed product (Volumes 1-33) initially, created by DOE's predecessor, the U.S. Atomic Energy Commission (AEC). NSA includes citations to scientific and technical reports from the AEC, the U.S. Energy Research and Development Administration and its contractors, plus other agencies and international organizations, universities, and industrial and research organizations. References to books, conference proceedings, papers, patents, dissertations, engineering drawings, and journal articles from worldwide sources are also included. Abstracts and full text are provided if available.

Analysis of Stress and Strain Distributions in Triaxial Tests Using the Method of Finite Elements

Analysis of Stress and Strain Distributions in Triaxial Tests Using the Method of Finite Elements
Author: Narayanaswamy Radhakrishnan
Publisher:
Total Pages: 202
Release: 1973
Genre: Electronic data processing
ISBN:
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A finite element computer code called WESTES was developed to study the influences of laboratory testing equipment on the states of stress and strain induced in cylindrical specimens of earth media. The code can solve general static, axisymmetric, boundary value problems and is programmed to take an incremental, nonlinear constitutive model called the Variable Moduli Model II. Some of the special features of the code include the ability to simulate cyclic (load/unload/reload) laboratory tests using iterative treatments at the load/unload and unload/reload interfaces and special logic to separately handle loading and unloading in the volumetric and deviatoric stress components as dictated by the constitutive model. (Modified author abstract).

Effects of Instrument Canister Placement Conditions on Ground Shock Measurements

Effects of Instrument Canister Placement Conditions on Ground Shock Measurements
Author: James K. Ingram
Publisher:
Total Pages: 112
Release: 1977
Genre: Shock (Mechanics).
ISBN:
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A combined analytical/experimental study entitled 'Canister-Backfill-Medium Interaction' (CBMI) was conducted to investigate the effects of backfilling procedures on the response of ground motion instruments located in instrumentation boreholes during wave propagation experiments. The experimental portion was conducted by the U.S. Army Engineer Waterways Experiment Station (WES) and is reported herein. A companion analytical study was conducted by Agbabian Associates (AA), El Segundo, California. The analytical study attempted to calculate the measured motion-time histories by use of input load functions and material properties data. Results of the analytical effort are discussed in a separate report published by AA.