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A turbine disk made from a Ni-base superalloy
A turbine disk made from a Ni-base superalloy will be operating at1350F. The creep data are given below. Determine the maximum stress allowable ifthe design criterion requires less than 1% strain in 1 …
Engineering / General Mechanical Engineering 2016-01-22 1 Yes $5.00
Steady state power law creep data for a steel alloy
Steady state power law creep data for a steel alloy at 60MPa are given below.Steady State Strain Rate (s -1) Temperature (K)1.0 x 10 -5 9772.5 x 10 -3 1089The stress exponent, n, for this alloy is 6. …
Engineering / General Mechanical Engineering 2016-01-22 1 Yes $5.00
What is the structure's angular velocity after 57.8s
Far out in space, a mass .0 kg rocket and a mass m2= 245000.0 kg rocket are docked at opposite ends of a motionless 87.0m long connecting tunnel. The tunnel is rigid and has a mass of 11600.0kg. How f …
Engineering / General Mechanical Engineering 2016-01-22 1 Yes $7.00
If pulling on an elastic rod causes it to contract perpendicular
A. If pulling on an elastic rod causes it to contract perpendicular to the stretch direction (i.e. become thinner), is that proof of anisotropy? Or could the material be isotropic?B. If a slab of mate …
Engineering / General Mechanical Engineering 2016-01-22 1 Yes $11.00
A force of P = 20 N is applied to the cable, which causes
A force of P = 20 N is applied to the cable, which causes the 175-kg reel to turn without slipping on the two rollers A and B of the dispenser. Neglect the mass of the cable. Each roller can be consid …
Engineering / General Mechanical Engineering 2016-01-22 1 Yes $6.00
An automobile engine has a thermal efficiency of 18 percent
An automobile engine has a thermal efficiency of 18 percent.The temperature of the fuel is 950 C , and the surrounding air is at 25 oC.Does the operation of this engine violates the second law of ther …
Engineering / General Mechanical Engineering 2016-01-22 1 Yes $5.00
Compute the mass fraction of eutectoid cementite in an iron
Compute the mass fraction of eutectoid cementite in an iron-carbon alloy that contains 1.00 wt% C. …
Engineering / General Mechanical Engineering 2016-01-22 1 Yes $3.00
A rod is made from two segments: AB is steel and BC is brass
A rod is made from two segments: AB is steel and BC is brass. It is fixed at its ends and subjected to a torque of T = 700 N-m. Gbr = 37GPa , Gst = 75 GPa.Find torque in section CB; torque in section …
Engineering / General Mechanical Engineering 2016-01-22 1 Yes $5.00
Find the primary creep elongation and the steady state
one specimen has an initial diameter of 200mm and a length of 700mm. At a stress of 40MPa and a temperature of 538oC the steady state strain rate is about 2×10-4% per hour. Find the primary creep elon …
Engineering / General Mechanical Engineering 2016-01-22 1 Yes $5.00
A light bulbs operate at a temperature of 2500 C when bright
A light bulbs operate at a temperature of 2500 C when bright and 2200 C when dim. The creep rate of the filament when bright is 1.5 times that when dim. Assuming that the activation energy is constant …
Engineering / General Mechanical Engineering 2016-01-22 1 Yes $5.00
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