Question

A steel shaft transmits 20 kW of power at 10 Hz. Determine the smallest safe diameter of the shaft if the shear stress τmax is not to exceed 50 MPa and the angle of twist θ is limited to 5°in a length of 4 m. Use G = 70 GPa. Using the relationship θ = TL / IpG in the above problem, again determine the diameter that is necessary to satisfy the requirement of rigidity (remembering to convert θ from degrees to radians). Considering the strength and rigidity requirements, which diameter should we choose.

Answer #1

**Please
thumbs up ? for this answer, Thankyou dear, Have a nice
day.**

A steel shaft transmits 20 kW of power at 10 Hz. Determine the
smallest safe diameter of the shaft if the shear stress
τmax is not to exceed 50 MPa and the angle of twist θ is
limited to 5°in a length of 4 m. Use G = 70 GPa.

The drive shaft AB of an automobile with 1.7 m
long is made of a steel having an allowable shear stress
τall = 60 MPa and
modulus of rigidity G = 80 GPa. Limit angle of
twist of the shaft is 0.035 rad. If the outer
diameter of the shaft is 65 mm and the engine
delivers 180 kW to the shaft when it is turning at
1170 rev/min, determine the minimum required
thickness of the shaft’s wall.

a) An internal combustion engine of 100 horsepower (hp)
transmits power to the car wheels of an automobile at 600 rev/min
(rpm). Neglecting any transmission losses, determine the minimum
permissible diameter of the solid circular section steel shaft if
the maximum shear stress in the shaft is limited to 75MPa. What
will be the resulting angle of twist of the shaft, due to the
applied torque, over a length of 1 m? Given that the rigidity
modulus, G = 50...

A solid alloy shaft of 50 mm diameter is coupled in series with
a hollow steel shaft of same external diameter. Determine the
internal diameter of the hollow steel shaft if the angle of twist
per unit length in hollow shaft is 75% of that of the solid alloy
shaft. Also, determine the speed at which the compound shaft must
be driven to transmit 200 kW, if the limiting shear stresses are 55
MPa and 75 MPa in alloy and...

A solid steel shaft, 20 mm in diameter and 1 m long, is placed
concentrically inside a hollow
duralumin shaft with inside and outside diameters of 30 mm and
33 mm respectively and a
length of 500 mm. The ends of the hollow shaft are rigidly fixed
to the solid shaft. Determine
(a) the torsional stiffness of the composite shaft
(b) the maximum torque to which the composite shaft may be
subjected if the allowable
shear stresses for steel and...

5. A solid steel shaft has a diameter of 200mm. The shaft
transmits 550kW at 300r/min. It is also subjected to a bending
moment of 10kNm and an end thrust of 400kN. Find:
5.1 The applied torque
5.2 The applied shear stress
5.3 The applied bending stress
5.4 The stress due to the end thrust
Draw a stress element and matching Mohr’s circle clearly showing
Both principle stresses and the maximum shear stress at:
5.5 the top of the shaft’s...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 6 minutes ago

asked 18 minutes ago

asked 25 minutes ago

asked 38 minutes ago

asked 38 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago