A long circular shaft of length L with variable cross-section is fixed onto rigid walls as shown in Figure 1.1. The polar moment of inertia of the L/3-long segment (J1) with a larger cross section is three times larger than that of a 2L/3-long segment (J2) on the right. Assume the shear modulu is constant and equal to G for the entire shaft and that strains are small and linear elastic. L/3 a b L/3 L/3 Figure 1.1. Shaft with variable cross-section and external torque T. (a) If the shaft is subjected to an external torque T at point b, find the angle of twist of point b with respect to point a. (b) If the shaft is subjected to an external torque T at point a, as shown in Figure 1.2, find the angle of twist of point a with respect to point b. J2 L/3- L/3 L/3

Elements Of Electromagnetics
7th Edition
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Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A long circular shaft of length L with variable cross-section is fixed onto rigid walls as shown in
Figure 1.1. The polar moment of inertia of the L/3-long segment (J1) with a larger cross section
is three times larger than that of a 2L/3-long segment (J2) on the right. Assume the shear modulu
is constant and equal to G for the entire shaft and that strains are small and linear elastic.
L/3
a
b
L/3
L/3
Figure 1.1. Shaft with variable cross-section and external torque T.
(a) If the shaft is subjected to an external torque T at point b, find the angle of twist of point b
with respect to point a.
(b) If the shaft is subjected to an external torque T at point a, as shown in Figure 1.2, find the
angle of twist of point a with respect to point b.
J2
L/3-
L/3
L/3
Transcribed Image Text:A long circular shaft of length L with variable cross-section is fixed onto rigid walls as shown in Figure 1.1. The polar moment of inertia of the L/3-long segment (J1) with a larger cross section is three times larger than that of a 2L/3-long segment (J2) on the right. Assume the shear modulu is constant and equal to G for the entire shaft and that strains are small and linear elastic. L/3 a b L/3 L/3 Figure 1.1. Shaft with variable cross-section and external torque T. (a) If the shaft is subjected to an external torque T at point b, find the angle of twist of point b with respect to point a. (b) If the shaft is subjected to an external torque T at point a, as shown in Figure 1.2, find the angle of twist of point a with respect to point b. J2 L/3- L/3 L/3
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