Deformation of rocks under uniaxial tension
Tensile tests were conducted on cylindrical rock specimens, cemented to end-caps attached to nontwist cables. In other tests, the rock specimens were bonded to platens cycled between tension and compression. The results indicated that the initial tangent modulus of rock is similar, both in uniaxial tension and in compression, but in tension the modulus decreases with increase of applied load; whereas, in compression, the modulus increases up to the stage of incipient failure. The value of the 50% modulus in compression is usually greater than the value in tension. At very low stresses, the Poisson ratio of rock in tension can be greater than 0.5, but after load cycling, the ratio is around or less than 0.1. (17 refs.)
- OSTI ID:
- 6575723
- Journal Information:
- Int. J. Rock Mech. Min. Sci.; (United States), Journal Name: Int. J. Rock Mech. Min. Sci.; (United States) Vol. 10:6; ISSN IJRMA
- Country of Publication:
- United States
- Language:
- English
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