Acoustic Emissions from Polycrystalline Ice

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 pres...

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Bibliographic Details
Main Authors: St Lawrence,William F, Cole,David M
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
Format: Text
Language:English
Published: 1982
Subjects:
Snow
Ice and Permafrost
Optics
*Ice
*Acoustic emissions
Polycrystalline
Compression
Loads(Forces)
Cracking(Fracturing)
Response
Strain(Mechanics)
Stresses
Statistical analysis
PE61101A
AS91D
WU336
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA119632
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA119632
Description
Summary: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. (Author)

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