UID:
kobvindex_GFZ20200402131224
Format:
iv, 15 Seiten
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Illustrationen
Series Statement:
CRREL Report 82-21
Content:
The acoustic emission response from fine-grained polycrystalline ice subjected to constant compressive loads was examined. A number of tests were conducted with the nominal stress ranging from 0.8 to 3.67 MPa at a temperature of -5 C. The acoustic emission response was recorded and the data are presented with respect to time and strain. The source of acoustic emissions in ice is considered in terms of the formation of both microfractures and visible fractures that develop without catastrophic failure of the ice. A model to describe the acoustic emission response is developed.
Note:
CONTENTS
Abstract
Preface
Introduction
Background
Experimental procedures
Ice specimens
Mechanical test equipment
Acoustic emission equipment
Data recording
Acoustic emission sources in ice
Acoustic events and visible fracturing
Source mechanisms
Tests on ice single crystals
General acoustic emission response
Analysis of data
Transient response
Steady-state response
Amplitude distribution
Combined transient and steady-state response in the time domain
Discussion
Summary
Literature cited
In:
CRREL Report, 82-21
Language:
English
Keywords:
Forschungsbericht
URL:
https://hdl.handle.net/11681/9366
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