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)The Mohr circles representing the states of stress at two points, A and B, and in the same rock type at different levels in the crust are shown in the figure below with the Mohr Failure envelope for the rock type. The principal stresses at each point are vertical and horizontal as shown. The rock at B is at the point of failure. Answer the following questions. (Choose 5 only) 50 bo MPa 1. Which point is deeper in the crust, A or B? 2. What is the mean stress at point A? 3. What is the differential stress at point B?

)The Mohr circles representing the states of stress at two points, A and B, and in the same rock type at different levels in the crust are shown in the figure below with the Mohr Failure envelope for the rock type. The principal stresses at each point are vertical and horizontal as shown. The rock at B is at the point of failure. Answer the following questions. (Choose 5 only) 50 bo MPa 1. Which point is deeper in the crust, A or B? 2. What is the mean stress at point A? 3. What is the differential stress at point B?

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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) The Mohr circles representing the states of stress at two points, A and B, and in the same rock type at different levels in the crust are shown in the figure below with the Mohr Failure envelope for the rock type. The principal stresses at each point are vertical and horizontal as shown. The rock at B is at the point of failure. Answer the following questions. (Choose 5 only) 50 1bo MPa 1. Which point is deeper in the crust, A or B? 2. What is the mean stress at point A? 3. What is the differential stress at point B? 4. Is o3 at point A tensile or compressive? Why? 5. If The pore fluid pressure at A is increased until the rock hydraulically fractures, show on the figure at top right the orientation of these fractures with the sense of movement that they would undergo under the given stress. 6. Calculate the critical shear stress to induce onset of fractures at point B.
Transcribed Image Text:) The Mohr circles representing the states of stress at two points, A and B, and in the same rock type at different levels in the crust are shown in the figure below with the Mohr Failure envelope for the rock type. The principal stresses at each point are vertical and horizontal as shown. The rock at B is at the point of failure. Answer the following questions. (Choose 5 only) 50 1bo MPa 1. Which point is deeper in the crust, A or B? 2. What is the mean stress at point A? 3. What is the differential stress at point B? 4. Is o3 at point A tensile or compressive? Why? 5. If The pore fluid pressure at A is increased until the rock hydraulically fractures, show on the figure at top right the orientation of these fractures with the sense of movement that they would undergo under the given stress. 6. Calculate the critical shear stress to induce onset of fractures at point B.
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