发明名称 |
Modified ring test |
摘要 |
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.
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申请公布号 |
US4821577(A) |
申请公布日期 |
1989.04.18 |
申请号 |
US19870065317 |
申请日期 |
1987.06.22 |
申请人 |
DOWELL SCHLUMBERGER INCORPORTED |
发明人 |
THIERCELIN, MARC;ROEGIERS, JEAN C. |
分类号 |
G01N3/02;G01N3/08;G01N33/24;(IPC1-7):G01N19/08 |
主分类号 |
G01N3/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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