Friday, August 3, 2018

TORSION OF SHAFT

CALCULATE THE DIAMETER OF SOLID SHAFT, IF THE ALLOWABLE STRESS AND APPLIED POWER IS GIVENName The drive shaft of a motor is made of a material having an allowing shear stress of Determine 1) the minimum diameter required for a solid shaft. Tallow 75 MPa. The shaft is designed to transmit 40 k W of power at 900 rpm. m outside diameter required for a hollow shaft if the shaft inside diameter is designed to be 80 percent of its outside diameter. cantilever heam i l1


Steps to solve:

  1. Allowable stress, power and rotation is given
  2. from power and rotation find torque
  3. finally find the diameter of shaft

IF THE INTERNAL DIAMETER IS .8 TIMES THE OUTSIDE DIAMETER THEN FIND THE ENTERTAINMENT OF HOLLOW SHAFT

Steps to solve:

  1. Allowable stress, power and rotation is given
  2. from power and rotation find torque
  3. finally find the diameter of shaft


CALCULATE THE DIAMETER OF SHAFT WHEN THE TORSION IS APPLIED

Problem 11.43 3 of 3 The two pulleys attached to the shaft are loaded as shown in the figure below. (Figure 1) VPart A If the bearings at A and B exert only vertical forces on the shaft, determine the required diameter of the shaft using the maximum-shear-stress theory. Suppose that Tallow 12.2 ksi Express your answer to three significant figures and include the appropriate units Figure 1 of 1 dValue Units 0.5 ft Submit Request Answer 1 ft 3 ft 2 ft 120 lb 300 lb 300 lb 120 lb < Return to Assignment Provide Feedback

Steps to solve:

  1. Draw torque diagram in terms of Ta and Tb.
  2. since A and B are fixed hence rotation will be zero
  3. From Above relation find Ta
  4. draw the torque diagram
  5. Now find the diameter of shaft



CALCULATE THE VALUE OF 'P' AND LENGTH OF SHAFT AB



Steps to solve:

  1. Draw toque diagram in terms of P
  2. find polar moment of inertia
  3. from polar moment of inertia find the torue
  4. find the P
  5. find the length AB


1) A rod that is fixed on both ends is subjected to a Torque of 680 N*m as shown. Segment AB is made of steel and BC is made of brass. If the steel rod has a diameter of 30 mm, what is the required diameter of the brass portion so that the reactions at the walls are the same? Gst 75 GPa Gbr 39 GPa 1.60 m 680 N-m 0.75 m
olour Page so ? o, 13 30Gr anan Ct) TOY Steel 9? o. 32. a g


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