Consider two series of triaxial compression test data, one for Rock A and one for Rock B. Which of these two rocks deviates the most from linear elastic behavior? A Differential Stress (MPa) a b 160 140 120 100 80 60 40 20 Rock A -3 Rock B Radial -2 -1 0 Axial 6₁-50 MPa O 40 MPa 03-5 MPa 1 2 Strain (me) 0-30 MPa 03-20 MPa 0-10 MPa 3 4 5 6 7 Kamali-Asl, A., Ghazanfari, E., Newell, P., & Stevens, M. (2018). Elastic, viscoelastic, and strength properties of Marcellus Shale specimens. Journal of Petroleum Science and Engineering, 171, 662- 679. STRESS (psi) 25000 20000 15000 Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. 10000 5000 0 130 CONFINING 20 STRESS (MPB) -0.008 -0.01 10*******. LATERAL- O -0.004 -0.006 0.002 0 0.004 0.002 0 30 20 AXIAL 0.006 0.008 10 0.01 STRAIN Fig. 3.9-Axial stress difference vs. axial and lateral strain for triaxial compression of sandstone for four confining stresses. B Warpinski and Smith 1989 in Recent Advances in Hydraulic Fracturing
Consider two series of triaxial compression test data, one for Rock A and one for Rock B. Which of these two rocks deviates the most from linear elastic behavior? A Differential Stress (MPa) a b 160 140 120 100 80 60 40 20 Rock A -3 Rock B Radial -2 -1 0 Axial 6₁-50 MPa O 40 MPa 03-5 MPa 1 2 Strain (me) 0-30 MPa 03-20 MPa 0-10 MPa 3 4 5 6 7 Kamali-Asl, A., Ghazanfari, E., Newell, P., & Stevens, M. (2018). Elastic, viscoelastic, and strength properties of Marcellus Shale specimens. Journal of Petroleum Science and Engineering, 171, 662- 679. STRESS (psi) 25000 20000 15000 Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. 10000 5000 0 130 CONFINING 20 STRESS (MPB) -0.008 -0.01 10*******. LATERAL- O -0.004 -0.006 0.002 0 0.004 0.002 0 30 20 AXIAL 0.006 0.008 10 0.01 STRAIN Fig. 3.9-Axial stress difference vs. axial and lateral strain for triaxial compression of sandstone for four confining stresses. B Warpinski and Smith 1989 in Recent Advances in Hydraulic Fracturing
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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2 multiple choice questions.
Transcribed Image Text:Consider two series of triaxial compression test data, one for Rock A and one for Rock B. Which of these two rocks deviates the most from
linear elastic behavior?
A
Differential Stress (MPa)
a
b
160
140
120
100
80
60
40
20
0
Rock A
-3
Rock B
Radial
-2 -1 0
Axial
03-50 MPa
0-40 MPa
03-5 MPa
1 2
Strain (me)
0-30 MPa
03-20 MPa
03-10 MPa
3 4 5 6
7
Kamali-Asl, A., Ghazanfari, E., Newell, P., & Stevens, M. (2018).
Elastic, viscoelastic, and strength properties of Marcellus Shale
specimens. Journal of Petroleum Science and Engineering, 171, 662-
679.
STRESS (psi)
25000
20000
15000
Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer.
10000
5000
0
CONFINING 20
STRESS
(MPB)
-0.008
-0.01
130
10.
LATERAL-
-0.006
O
-0.004
0.002
0
0.004
0.002
30
20
0.006
AXIAL
0.008
10
0.01
STRAIN
Fig. 3.9-Axial stress difference vs. axial and lateral strain
for triaxial compression of sandstone for four confining
stresses.
B
Warpinski and Smith 1989 in Recent Advances
in Hydraulic Fracturing
Transcribed Image Text:After running triaxial compression tests and estimating Young's modulus for a rock to be 25 GPa, a series of ultrasound pulse experiments are
performed in order to also estimate dynamic Young's modulus from the wavespeed and density. Is this dynamic Young's modulus expected to
be the same, smaller, or larger than the static Young's modulus obtained from triaxial tests? Assume the rock has a typical level of non-
linearity in its behavior.
Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer.
a
Smaller
b The same
C
Larger
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