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Questions -
1) For a power transmission system, a solid steel shaft is required to transmit a torque of 2640 Nm. The limiting factor is that the twist of the shaft should not exceed 5 degrees for each metre of the shaft length. The shear modulus G is 75 GPa for this steel. What should be the minimum shaft diameter?
2) An aluminium plate loaded in tension contains a through-thickness edge crack with a/W ratio of 0.37. It is loaded with a remote tensile stress of 95 MPa. If the toughness of the aluminium is 25 MPa √m. Determine the critical crack length at which fracture will occur? (You will need to use the Y calibration curve illustrated below)
3) Rearrange the following equation to solve for a;
KI = Yσ√(πa)
4) Rearrange the following equation to solve for σ;
5) A wide plate of steel with a toughness of 80 MPa √m is loaded with a remote tensile stress. It contains an edge crack of length a = 24 mm. If the plate can be modelled as an infinite plate where Y = 1.12, at what stress will this crack cause a brittle fracture?
the flight path of a jet aircraft as it takes off is defined by the parametric equations x 1.25 t2 and y 0.03 t3
The total work content for a product assembled on a manual production line is 48 min. The work is transported using a continuous overhead conveyor that operates at a speed of 3 ft/min.
a state runs a lottery in which 6 numbers are randomly selected from 40 without replacement. a player chooses 6 numbers
air contained in a piston-cylinder assembly is initially at 350 k 150 kpa and a volume of 0.15 l. as the cylinder is
a turbojet aircraft is flying with a velocity of 320 ms at an altitude of 9150 m where the ambient conditions are 32
A product whose total work content time = 50 min is to be assembled on a manual production line. The required production rate is 30 units/hr.
a mass of 5 kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder device at 125kpa. initially
The slender uniform homogeneous rods AB and BC weigh 16.1-lb and 32.2-1b, respectively. Block C weighs 64.4-lb and moves in the slot as shown. Rod AB has a constant angular velocity of 2radis (counterclockwise). Find the kinetic energy of the syst..
Determine the energy loss for a gradual contraction from a DN 125 Schedule 80 steel pipe to a DN 50 Schedule 80 pipe for a flow rate of 500 L/min. The cone angle for the contraction is 105°.
What is the initial velocity of Block B, constant acceleration of Block A, velocities of both blocks at t=3s, and the total distance traveled by block B from t=0s to t=3s?
Neglecting any frictional effects of the pulleys, calculate the deflection of the wire, expressed in millimeters.
an insulated piston-cylinder device contains 5 l of saturated liquid water at a constant pressure of 150 kpa. an
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