List some factors that influence whether a rock will deform: in an elastic manner, in a plastic manner, or break when placed under stress
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List some factors that influence whether a rock will deform:
- in an elastic manner,
- in a plastic manner,
- or break when placed under stress
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- If the material is subjected to triaxial stress, What does each principal stress contribute?SITUATION: List some factors that influence whether a rock will deform: 1. in an elastic manner, 2. in a plastic manner, 3. or break when placed under stress Civil Engineering Department Technological InstiteDefine Volume Change Due to Deviator Stress
- If a factor of safety =1.9, what would be the allowable stress?2) A given material the linear limit is 1.8 * 106 N/ m? and the ultimate compressive strength is 1.8 *10 N/m² and cross sectional area is 6 *104, If the length change by 20%, What is Y material ? A) 9*105 N / m? B) 9*10 6 C) 6 * 10° N / m ? D) 9 *106 N / m?For the stress-strain diagram, which region or point represents fracture?
- 4. Which of the following types of deformation results in rock folds? a. Ductile Deformation b. Brittle Deformation c. Elastic DeformationPROBLEMS 203. During a stress-strain test, the unit deformation at a stress of 5000 psi Wap ODserved to be 0.000167 in./in. and at a stress of 20,000 psi it was 0.000667 in./in. If the proportional limit is 30,000 psi, what is the modulus of elasticity? What is the stress corresponding to a strain of 0.0002 in./in.? Would these re- sults be valid if the proportional limit were 18,000 psi? Explain. E = 30 X 106 psi; S 6000 psi %3D Ans. 204. A uniform bar of length L, cross-sectional area A, and weight W is sus- WL If pended vertically from one end. Show that its total elongation is & = 2AE wL? its weight per unit volume is w, show also that & 2E A steel rod having a cross-sectional area of sq in. and a length of 600 ft is suspended vertically. It supports a load of 5000 lb at the lower end. If steel 30 X 106 psi, find the total elongation in the rod. Ans. 8 = 2.64 in. 205 weighs 490 lb/cu ft and E Hint: Use the result of Prob. 204. steel wire 30 ft long, hanging vertically, supports a…During the stress strain test, the unit deformation at a stress of 35 MN/m2 it was 667 x 10^-6 mm. If the proportional limit was MN/m2, what is the modulus of elasticity? A 10 x 10^8 N/cm2 5.8 x 10^6 N/in2 2.1 x 10^5 N/mm2 D 35 x 10^6 N/mm2
- In Hooke and Brown's equation, If we have the value of m , how is the peak value of tensile strength calculated for granite, rhyolite, marble?? qu = 100MPa For marble (m = 7): peak compressive strength =? For rhyolite (m =17): peak compressive strength =? For granite (m = 25): peak compressive strength =?A piece of material is subjected to two compressive stresses at right angles, their values being 40 N/mm2 and 60 N/mm2. Find the position of the plane across which the resultant stress is most inclined to the normal, and determine the value of this resultant stress.During a stress-strain test, the unit deformation at a stress of 35 MPa was observed to be 167 x 10-6 m/m and at a stress of 140 MPa it was 667 x 10-6 m/m. If the proportional limit was 200 MPa, what is the modulus of elasticity? What is the strain corresponding to stress of 80 MPa? A E = 200,000 MPa; ε = 318 x 10-6 m/m B E = 210,000 MPa; ε = 381 x 10-4 m/m CE=211,000 MPa; ε = 318 x 10-4 m/m (D) E = 210,000 MPa; ε = 381 x 10-6 m/m