Modified ring test

Details Modified ring test Modified ring test

G - Physics

01

N

73/102, 354/28,

G01N 19/08 (2006.01) G01N 3/08 (2006.01) G01N 3/02 (2006.01) G01N 33/24 (2006.01)

Patent

CA 1291263

ABSTRACT OF THE DISCLOSURE A novel test specimen configuration and modified ring test method for determining the fracture toughness, KIC, using rock core is disclosed. The use of a truncated hollow cylindrical specimen under compressive load avoids the development of a large process zone (microcracked region) during testing, thus allowing accurate fracture toughness measurements on subsized specimens. Results using soft sandstones and Indiana limestone validate the procedure.

549824

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