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The dynamic tensile strength of ice and ice-silicate mixturesThe dynamic tensile strength of icy media is measured at strain rates on the order of 10,000/sec to aid in the understanding of impact and cratering phenomena. Compressed samples consisting of ice and ice-silicate mixtures with 5 and 30 wt % sand were impacted at temperatures between 230 and 250 K by projectile plexiglas plates imparting the required strain rates in less than 0.75 microsec. Taking the tensile stress corresponding to the transition from intact to spalled or fragmented samples as the dynamic tensile strength, strengths of 17, 20 and 22 MPa were obtained for the pure ice, 5 wt % sand, and 30 wt % sand specimens, respectively. The values lie considerably above those observed in static testing. A continuum fracturing model is used to obtain relations between tensile strength and stress rate as well as to derive stress and damage histories during tensile loading and the size distribution of icy fragments as a function of strain rate.
Document ID
19830041149
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lange, M. A.
(California Inst. of Tech. Pasadena, CA, United States)
Ahrens, T. J.
(California Institute of Technology Pasadena, CA, United States)
Date Acquired
August 11, 2013
Publication Date
February 10, 1983
Publication Information
Publication: Journal of Geophysical Research
Volume: 88
Subject Category
Earth Resources And Remote Sensing
Accession Number
83A22367
Funding Number(s)
CONTRACT_GRANT: NGL-05-002-105
Distribution Limits
Public
Copyright
Other

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