Question: Two 300-mm-long rectangular steel strips are placed together as shown. Using a maximum allowable shear stress of 80 MPa, determine the maximum torque and angular

Two 300-mm-long rectangular steel strips are placed together as shown. Using a maximum allowable shear stress of 80 MPa, determine the maximum torque and angular twist, and the torsional spring rate. Compare these with a single strip of cross section 30 mm by 4 mm. Solve the problem two ways:
(a) Using Eqs. (3€“40) and (3€“41),
(b) Using Eq. (3€“47).

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2 mm 4 mm 30 mm

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