07 - Mechanical properties Flashcards
1
Q
stress leads to ..
A
deformation
failure
changes of measurable physical properties
2
Q
Rock Quality Designation Index
A
RQD = π π’π πππππ‘β ππ ππππβπππ ππππππ >100 ππ /
π‘ππ‘ππ πππππ‘β ππ ππππ βπππ π ππππππ‘
3
Q
Mohrβs circle:
Shearstress vs. effective normal stress
shear stress?
A
shear stress
tau = C + mΓΌ * (sigma_n - P)
C = Cohesion
4
Q
Correlation uniaxial compression strength with porosity
A
UCS exponentially decrease with Porosity
5
Q
Elasitc moduli
static vs. dynamic
A
Edyn > Estat
difference decreases:
- rocktypes low high
- unconsolidated sediments to compact
6
Q
cohesionless
A
gravel, sand
7
Q
cohesive
A
clay
