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Record #112418:

Crack-fabrication techniques and their effects on the fracture toughness and CTOD for fresh-water columnar ice / Y. Wei, S.J. DeFranco, J.P. Dempsey.

Title: Crack-fabrication techniques and their effects on the fracture toughness and CTOD for fresh-water columnar ice / Y. Wei, S.J. DeFranco, J.P. Dempsey.
Author(s): Wei, Y.
DeFranco, S. J.
Dempsey, J. P.
Date: 1991.
In: Journal of Glaciology. (1991.), Vol. 37(126) (1991)
Abstract: Effects of notch acuity (crack-tip sharpness) on fracture and toughness of S2 ice were investigated using six groups of single-edge-notched-bend specimens with different crack (or notch) root radii fabricated by six methods. Mean value and standard deviations of apparent fracture-toughness values of specimens with blunt notches were significantly higher than those with sharp cracks. Results provide estimate of required notch acuity for fracture-toughness testing. Crack-tip-opening-displacement (CTOD) measured in this study indicates existence of microplastic deformation in vicinity of crack tip at initiation of unstable fracture.
Notes:

Journal of Glaciology. Vol. 37(126) :270-280 (1991).

Keywords: 551.32 -- Glaciology.
551.322 -- Ice and snow.
551.326 -- Floating ice.
539.42 -- Ice, tensile strength.
E4 -- Glaciology: physics and chemistry of ice.
SPRI record no.: 112418

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