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Title: Study of wave propagation in confined soils
Authors: IIT Research Institute.
United States. Defense Atomic Support Agency.
Hampton, D.
Huck, Peter J.
Keywords: Shock tubes
Soil mechanics
Stress waves
Wave properties
Publisher: U.S. Army Engineer Waterways Experiment Station.
Engineer Research and Development Center (U.S.)
Description: Contract Report
Abstract: This study had as its objectives: A.) to develop and evaluate an improved experimental technique, using embedded stress and strain gages, for the direct observation of the stress-strain response of confined soils during wave propagation, B.) to correlate these stress-strain characteristics with those obtained independently with the WES, one-dimensional compression device, and C.) to calculate expected wave propagation phenomena based on the measured stress-strain characteristics. The soil specimens were contained in a segmented, horizontal hollow cylinder consisting of 1-in.-long aluminum sections of about 3-in. diam, with 1/8-in. foam rubber spacers on each end. Two soils were used in this study. Most of the tests were performed on Edgar Plastic Kaolin (EPK) clay; however, two tests were performed on a clayey sand from the McCormick Ranch test site, Albuquerque, New Mexico. The peak stress levels in these tests were in the range of 400 to 1000 psi. All loadings were created by use of a gas shock tube. Embedded stress and strain gages were used to measure the stress-time and strain-time histories at various points along the length of the specimens. From these tests, information was gained concerning stress-strain characteristics at these various points. In addition, data were obtained on peak stress attenuation, velocities of wave propagation, wave front development, and experimental error. Two test series were run: the first was for the purpose of perfecting the confining chamber and shock tube apparatus; the second was the main test series to be used for analysis. NOTE: This file is large. Allow your browser several minutes to download the file.
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