Multiaxial loading of large-diameter, thin-walled tube rock specimens
A large-scale mechanical testing facility permits previously impossible thin-walled tube multiaxial loading experiments on rock materials. Constraints are removed regarding tube wall thickness in relation to rock microstructural features and tube diameter as well as test machine load capacity. Thin-walled tube studies clarify the influence of intermediate principal stress sigma/sub 2/ on rock fracture and help define a realistic rock fracture criterion for all multiaxial stressing situations. By comparing results of thin-walled and thick-walled tube fracture investigations, effects of stress gradients can be established. Finally, influence of stress path on rock fracture, an area largely ignored in current rock failure criteria, can be examined in detail using controlled loading changes as well as specimen prestrains.
- Research Organization:
- Chemistry-Materials Science Division, Los Alamos National Laboratory, Los Alamos, NM 87545
- OSTI ID:
- 5527457
- Journal Information:
- Geophys. Res. Lett.; (United States), Vol. 8:7
- Country of Publication:
- United States
- Language:
- English
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