1. The orientation of wide breakout failure will always be in the direction of GH. 2. Tensile Failure Cylindrical occurs when: ot S-To 3. Total stress = Effective Stress of Rock Grains Pore Pressure.
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- Solve the preceding problem if the internal pressure is 3,85 MPa, the diameter is 20 m, the yield stress is 590 MPa, and the factor of safety is 3.0. (a) Determine the required thickness to the nearest millimeter. (b) If the tank wall thickness is 85 mm, what is the maximum permissible internal pressure?The hollow drill pipe for an oil well (sec figure) is 6,2 in. in outer diameter and 0.75 in. in thickness. Just above the bit, the compressive force in the pipe (due to the weight of the pipe) is 62 kips and the torque (due to drilling) is 185 kip-in. Determine the maximum tensile, compressive, and shear stresses in the drill pipe.A scuba t a n k (see fig ure) i s bci ng d e signed fo r an internal pressure of 2640 psi with a factor of safety of 2,0 with respect to yielding. The yield stress of the steel is 65,000 psi in tension and 32,000 psi in shear, (a) If the diameter of the tank is 7,0 in., what is the minimum required wall thickness? (b) If the wall thickness is 0.25 in., what is the maximum acceptable internal pressure?
- A copper alloy pipe with a yield stress aY= 290 MPa. is to carry an axial tensile load P = 1500 kN (see figure part a). Use a factor of safety of 1.8 against yielding. (a) If the thickness t of the pipe is one-eighth of its outer diameter, what is the minimum required outer diameter dmin? (b) Repeat part (a) if the tube has a hole of diameter dt 10 drilled through the entire tube, as shown in the figure part b.4 In hardness test, a force of 3000 kgf applied using steel ball of 10 mm, the result hardness value is (BHN=200+N) where N is your number in class. Calculate the mean depression w bli nöy :diameters (d)? N=92Problem 4 Press-Fit (3-116) Matlab Code is for (3-117) The table gives data concerning the shrink fit of two cylinders of differing materials and dimensional specification in inches. Elastic constants for different materials may be found in Table A-5. Identify the radial interference &, then find the interference pressure p, and the tangential normal stress on both sides of the fit surface. If dimensional tolerances are given at fit surfaces, repeat the problem for the highest and lowest stress levels. Problem Number Material 3-116 3-117 Inner Cylinder di Steel Steel 0 0 do 2.002 2.002 Outer Cylinder D; Material Steel Cast iron 2.000 2.000 Do 3.00 3.00
- cylindrical pressure vessel has inside diameter d_{o} = 500 mm and inside diameter di=490 mm.if it i made of carbon steel SAE 1040 OQT1300, find the maximum allowable internal pressure if the safety factor against yielding is not to be less than 4. Neglect the external pressure and assume that the longitudinal stresses are taken by the vessel itself. a) Solve using the MSST. b) Solve using the DET. See Appendix 3 for material properties.A spherical pressure vessel 300 mm in diameter has a uniform thickness of 6 mm. The vessel contain gas under pressure of 6000 kPa. If the ultimate tensile stress is 450 MPa, what is the factor safety with respect to tensile failure?Solution: 2 of 4 Problem 2: The short cylindrical block of 2014-T6 aluminum, having an original diameter of 0.5 in. and a length of 1.5 in., is placed in the smooth jaws of a vise and squeezed until the axial load applied is 800 lb. Given young's modulus 10.6x10 psi and Poisson ratio equal to 0.35. a) Determine the decrease in its length b) Determine its new diameter. 800 Ib 800 Ib Solution:
- Problem 1: For a 20-ply lay-up [(0/90)s]s in which ply thickness is 0.1 mm and stiffness is: 20. 0.7 [Q = 0.7 2.0 0 GPa 0 0.7 find the residual stresses if the cure temperature is 225°C, and the service temperature is 25°C. Given aj=0.02 x 10-6 *C-1 and a2-22.5 x 10-6 *C-17/8" Bolts t = 1/2" I Thickness Gusset plate Tension plate A36 Steel 3" 13" 3" P,= ? 3" Find the Tension Capacity of this plate, which is connected to the gusset plate with 16 -7/8" bolts 4" 4" Show A, of at least three most critical failure lines in your calculationSee the set of bars for made of a material that has a yield strength of 350 MPa, determine the minimum h1 and h2 dimensions required. Apply a safety factor F.S. = 1.5 without flow. Each bar is 12 mm thick