20.14 (B/C). An I-section has the dimensions shown in Fig. 20.18a, and is subjected to an axial torque. Find the maximum value of the torque if the shear stress in the material is limited to 56 MN/m² and the twist per metre length is limited to 9°. Assume the modulus of rigidity G for the material is 82 GN/m².
20.14 (B/C). An I-section has the dimensions shown in Fig. 20.18a, and is subjected to an axial torque. Find the maximum value of the torque if the shear stress in the material is limited to 56 MN/m² and the twist per metre length is limited to 9°. Assume the modulus of rigidity G for the material is 82 GN/m².
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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![20.14 (B/C). An I-section has the dimensions shown in Fig. 20.18a, and is subjected to an axial torque. Find the
maximum value of the torque if the shear stress in the material is limited to 56 MN/m² and the twist per metre length
is limited to 9°. Assume the modulus of rigidity G for the material is 82 GN/m².
50 mm
50 mm
4.75 mm
Tomm
51 mm
100 mm
6 mm
4.75 mm
(a)
(b)
Fig. 20.18.
If the I-section is replaced by a T-section made of the same material and transmits the same torque, what will be the
limb length, D, of the T-section and the angle of twist per metre length? Assume the T-section is subjected to the same
limiting conditioning as the I-section and that it has the dimensions shown in Fig. 20.18b. For narrow rectangular
sections assume k values of in the formulae for torque and angle of twist.
[B.P.][0.081 m; 6.5°/m.]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fff421022-7520-4d12-8f76-4f1db875ffab%2F4bb66d34-99ad-43a9-831c-dd8d8c819925%2Fco3q4kn_processed.png&w=3840&q=75)
Transcribed Image Text:20.14 (B/C). An I-section has the dimensions shown in Fig. 20.18a, and is subjected to an axial torque. Find the
maximum value of the torque if the shear stress in the material is limited to 56 MN/m² and the twist per metre length
is limited to 9°. Assume the modulus of rigidity G for the material is 82 GN/m².
50 mm
50 mm
4.75 mm
Tomm
51 mm
100 mm
6 mm
4.75 mm
(a)
(b)
Fig. 20.18.
If the I-section is replaced by a T-section made of the same material and transmits the same torque, what will be the
limb length, D, of the T-section and the angle of twist per metre length? Assume the T-section is subjected to the same
limiting conditioning as the I-section and that it has the dimensions shown in Fig. 20.18b. For narrow rectangular
sections assume k values of in the formulae for torque and angle of twist.
[B.P.][0.081 m; 6.5°/m.]
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