Describe one mechanism by which creep deformation can occur at stress less than the yield stress
In: Mechanical Engineering
Describe the mechanical test procedure for creep and fatigue testing of a material of your choice and schematically illustrate how the mechanical property data is representing (compare a typical creep cruve with a typical fatigue curve)
In: Mechanical Engineering
Define toughness for the case of 1) elastic deformation 2) plastic deformation 3) fast fracture
In: Mechanical Engineering
Explain what is meant by Hall-Petch strengthining of a metal alloy
In: Mechanical Engineering
differentiate the mechanisms of solid solution strengthening and precipitation hardening in a metal alloy
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Determine the magnitude of the Schmid factor for an FCC single crystal oriented with is [100] direction parallel to the loading axis
In: Mechanical Engineering
Derive the equation for the shear strain in terms of the mobile dislocation density and velocity
In: Mechanical Engineering
why would one choose a fire tube boiler instead of a water tube boiler
In: Mechanical Engineering
In: Mechanical Engineering
(30%) Q5. Composition of gas in diesel engine after combustion
engine is 5% oxygen, 20% carbon dioxide, 15% water vapor, and
remaining is nitrogen gas in volume. Temperature and pressure of
the gas is 1800K and 6 MPa. This gas is isentropically expanded to
the atmospheric pressure. Use air standard assumption.
a) Calculate the required properties of gas mixture (specific
heats, gas constant, etc.)
b) Calculate the power generated expansion for per kg of
mixture.
c) What is the temperature of gas after the expansion process.
In: Mechanical Engineering
Consider a large plate of thickness 50 mm and thermal conductivity of k= 69 W/m.C in which heat is generated uniformly at a constant rate of 600 kW/m3. One side of the plate is insulated while the other side is subjected to convection to the environment at 30oC with a heat transfer coefficient of h= 94 W/m^2.C. considering six equal spaced nodes with a nodal spacing of 10 mm:
(a) obtain the Finite Difference formulation of this problem,
(b) determine the nodal temperature under steady conditions by solving those equations (MANUALLY),
(c) repeat (b) by solving the equations using any software available,
(d) obtain the analytical solution of the temperature variation by applying Boundary Conditions, (e) sketch ONE graph showing the temperature value of those nodes that obtained from part b and d
In: Mechanical Engineering
information about (shaft's critical speed)..
What is it? How it happens? How to avoid it?
Draw??
In: Mechanical Engineering
i want for an exercise to find the materials for a supsension car system and manufacturing
In: Mechanical Engineering
Air flows down a pipe with a diameter of 0.15 m. At the inlet to the pipe, the Mach number is 0.1, the pressure is 70 kPa, and the temperature is 35°C. If the flow can be assumed to be adiabatic and if the mean friction factor is 0.005, determine the length of the pipe if the Mach number at the exit is 0.6. Also, find the pressure and temperature at the exit to the pipe.
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Why can't I use the sum of force(about y axis) =0 at point P? I used this method to get the tension in the cord at first of solution, but gotten wrong answer.
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In: Mechanical Engineering