The Brittle to Ductile Transition in Polycrystalline Ice under Tension.

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Abstract:

The tensile strength of equiaxed and randomly oriented ice Ih decreases with increasing grain size and with increasing temperature. The strength of fine-grained aggregates i.e. of aggregates finer than a critical grain size is controlled by the stress to propagate cracks. The strength of coarse-grained material is controlled by the stress to nucleate cracks.

Author(s):
Schulson, Erland M.
Author Organization(s):
THAYER SCHOOL OF ENGINEERING HANOVER N H
Descriptive Note:
Final rept. 15 Jan 80-14 Jan 83,
Pagination:
0010

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
ARO-16861.2-GS
Contract/Grant Number(s):
DAAG29-80-C-0064
Monitor Series:
16861.2-GS
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*CRYSTAL STRUCTURE, *DUCTILE BRITTLE TRANSITION, *ICE, MEASUREMENT, TEMPERATURE, TENSILE STRENGTH, PREPARATION, CRACKING(FRACTURING), TEST METHODS, GRAIN SIZE, STRAIN(MECHANICS), CRACK PROPAGATION
Field(s)/Group(s):
Snow, Ice and Permafrost, Crystallography, Mechanics
Report Date:
1983 Apr 13