Mechanics of rock deformation
Journal Article
·
· Annu. ASME Appl. Mech. Div. Rock Mech. Winter Symp.; (United States)
OSTI ID:6575706
A small amount of porosity in the form of cracks has a large effect upon the deformation of rock. Opening and closing of cracks under stress makes stress-strain curves nonlinear, and sliding between crack surfaces produces hysteresis. Microfracturing occurs at higher compression as open pores crush and cracks begin to grow. Cracks grow on the average in planes parallel to the maximum compression and open against even high lateral stresses, resulting in anisotropic deformation. Deformation is thus a complex process in which compaction due to the crushing of pores competes with dilatancy due to the growth of cracks. Comprehensive constitutive relations as such have not been developed for rocks, although techniques are available for calculating displacements from stresses for specific modes of deformation. (50 refs.)
- Research Organization:
- Massachusetts Inst Technol
- OSTI ID:
- 6575706
- Journal Information:
- Annu. ASME Appl. Mech. Div. Rock Mech. Winter Symp.; (United States), Journal Name: Annu. ASME Appl. Mech. Div. Rock Mech. Winter Symp.; (United States) Vol. 3
- Country of Publication:
- United States
- Language:
- English
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