Rock Fracture Toughness Under Mode II Loading: A Theoretical Model Based on Local Strain Energy Density
The values of mode II fracture toughness reported in the literature for several rocks are studied theoretically by using a modified criterion based on strain energy density averaged over a control volume around the crack tip. The modified criterion takes into account the effect of T -stress in addit...
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| Veröffentlicht in: | Rock mechanics and rock engineering 2018, Vol.51 (1), p.243-253 |
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| container_title | Rock mechanics and rock engineering |
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| creator | Rashidi Moghaddam, M. Ayatollahi, M. R. Berto, F. |
| description | The values of mode II fracture toughness reported in the literature for several rocks are studied theoretically by using a modified criterion based on strain energy density averaged over a control volume around the crack tip. The modified criterion takes into account the effect of
T
-stress in addition to the singular terms of stresses/strains. The experimental results are related to mode II fracture tests performed on the semicircular bend and Brazilian disk specimens. There are good agreements between theoretical predictions using the generalized averaged strain energy density criterion and the experimental results. The theoretical results reveal that the value of mode II fracture toughness is affected by the size of control volume around the crack tip and also the magnitude and sign of
T
-stress. |
| doi_str_mv | 10.1007/s00603-017-1319-7 |
| format | Article |
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T
-stress in addition to the singular terms of stresses/strains. The experimental results are related to mode II fracture tests performed on the semicircular bend and Brazilian disk specimens. There are good agreements between theoretical predictions using the generalized averaged strain energy density criterion and the experimental results. The theoretical results reveal that the value of mode II fracture toughness is affected by the size of control volume around the crack tip and also the magnitude and sign of
T
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T
-stress in addition to the singular terms of stresses/strains. The experimental results are related to mode II fracture tests performed on the semicircular bend and Brazilian disk specimens. There are good agreements between theoretical predictions using the generalized averaged strain energy density criterion and the experimental results. The theoretical results reveal that the value of mode II fracture toughness is affected by the size of control volume around the crack tip and also the magnitude and sign of
T
-stress.</description><subject>Agreements</subject><subject>Civil Engineering</subject><subject>Criteria</subject><subject>Density</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>Energy</subject><subject>Flux density</subject><subject>Fracture toughness</subject><subject>Geophysics/Geodesy</subject><subject>Heat treating</subject><subject>Original Paper</subject><subject>Rocks</subject><subject>Strain energy</subject><subject>Toughness</subject><issn>0723-2632</issn><issn>1434-453X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNp1kE9PAjEQxRujiYh-AG9NPFfbbXdLvaGCkmBMFBJvTemfZRFbbHcPfHuL68GLp0lm3nsz8wPgkuBrgjG_SRhXmCJMOCKUCMSPwIAwyhAr6fsxGGBeUFRUtDgFZyltMM5DPhqA-jXoDziNSrddtHARunrtbUpw6Y2N8DkYC2czOA_KNL6-hWO4WNsQbdtotf0Zb-GdStbA4LPq0Hxro2o8nHgb6z18sD417f4cnDi1Tfbitw7BcjpZ3D-h-cvj7H48R4pS0SIuVopUglVMjYxWzjiHDRGcMU3JSuSjscOlxfmz0gnHXEm5EaVmTluDGaNDcNXn7mL46mxq5SZ00eeVkghRiFKMiMgq0qt0DClF6-QuNp8q7iXB8sBT9jxl5ikPPCXPnqL3pKz1tY1_kv81fQM7-ncb</recordid><startdate>2018</startdate><enddate>2018</enddate><creator>Rashidi Moghaddam, M.</creator><creator>Ayatollahi, M. 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T
-stress in addition to the singular terms of stresses/strains. The experimental results are related to mode II fracture tests performed on the semicircular bend and Brazilian disk specimens. There are good agreements between theoretical predictions using the generalized averaged strain energy density criterion and the experimental results. The theoretical results reveal that the value of mode II fracture toughness is affected by the size of control volume around the crack tip and also the magnitude and sign of
T
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| subjects | Agreements Civil Engineering Criteria Density Earth and Environmental Science Earth Sciences Energy Flux density Fracture toughness Geophysics/Geodesy Heat treating Original Paper Rocks Strain energy Toughness |
| title | Rock Fracture Toughness Under Mode II Loading: A Theoretical Model Based on Local Strain Energy Density |
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