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It was shown in Chapters 1 and 2 that the resolved shear stress in a single slip system is related to the applied stress by the Schmid factor, M. For a poly crystal, σ = MTτ, where MT is commonly referred to as the Taylor factor. The value of MT is computed such that the continuity of slip at the grain boundary satisfies the requirement for five independent slip systems to operate in each grain. The values of MT are computed by invoking the principle of virtual work. Convince yourself, by consulting appropriate references and standard textbooks on mechanical metallurgy, that for random orientations of grains,
(a) For FCC polycrystals, MT = 3.06.
(b) For BCC polycrystals, MT = 2.00.
(c) Taylor-type calculations are not possible for HCP polycrystals where twinning and nonbasal slip influence deformation.
Your company is considering the purchase of new earth moving equipment. The total purchase is $240,000 and we pay with $100,000 cash and borrow the rest. (12% per year nominal, compounded monthly for 5 years).
Consider the following two simultaneous equations :x^2 + y^2 = 42x + 3*y + 2*y^2= 6 How many possible solutions for x and y? Note: one solution is pair of (x,y) 8 2 1 4
A stress orientation can always be found that maximizesnormal stresses and causes shear stresses to be zero.
Crude oil is at 50 degrees f (absolute viscosity=2.8*10^-4 lbf*s/ft^2) is flowing through a 24 inch diameter pipe. A pitot-static tube is used to measure the velocity at the center of the pipe
Find the cooling load (in tons of refrigeration) for a room supplied with 10,000 CFM of 95 DB outside air with ratio of 105 gr/lb. The room is to be maintained at 78 DB and humidity ratio of 71.5 gr/lb.
consider a house into which radon is emitted through cracks in the basement. the total volume of the house is 650 m3
fator dumps 5m^3/s of nonconservative waste with concentration 100mg/l into the lake. the pollutant has a reation rate coefficient K of 0,23/day assuming the pollutant is well mixed in the lake, find steady state concentration of pollatant in the ..
Three particles are sliding along a flat, frictionless surface. mA = 0.4 kg, mB = 0.5 kg, and mC = 0.4 kg. Before any collisions take place, vA = 15i m/s, vB = 10im/s, and vC = 5 m/s. e = 0.85 between A and B and e = 0.6 between B and C.
The suppliers says it would prefer to sell the company a 65% NaOH solution and the company says the water content is immaterial as long as the equivalent costs are the same including freight.
.An air turbine is used with a generator to generate electricity. Air at the turbine inlet is at 700 kPa and 25 degree C. The turbine discharges air in to the atmosphere at a temperature of 11 degree C.Inlet and outlet air velocities are 100 m/s and ..
A municipal WWTP discharges 22.5 MGD of secondary effluent containing 45 mg/L of ultimate BOD at 26.7 oC with 1.3 mg/L of dissolved oxygen. The stream flow is 237 ft3/s at a velocity of 2.1 ft/s and an average depth of 7 ft.
A decrease in height of 10 mm for the sample from one side was observed. What is the void ratio of the sample before high pressure application? What is the degree of saturation for the sample before high pressure application? Given that after high..
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