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Question: q4 to increase loadcarrying capacity of a tube inner diameter...

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Q4. To increase load-carrying capacity of a tube (Inner Diameter (ID): 40 mm; Outer Diameter (OD): 45 mm), it was determined in the last minute that it be reinforced by combining it with a larger tube OID: 45 mm. OD: 50mm) through shrink fitting, providing a static friction coefficient of 0.25. Measurement after machining indicated the OD of the inner tube to be 45.012 mm and ID of the outer tube to be 44.950 mm. Assume E for both tubes to be 207 GPa and v to be 0.3. a. Find the maximum torque the assembled tube can carry per unit length (length of 1 m). b. After assembling, if the composite tube is subjected to a bending moment of 0.675 kN.m and a torque of 0.9 kN.m, find factor of safety in both tubes, using the distortion-energy theory. Assume Srr to be 415 MPa.

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