(Solved): Problem 7.14. Torsional stiffness of a "Y" shaped cross-section Figure \( 7.3 ...

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Problem 7.14. Torsional stiffness of a "Y" shaped cross-section Figure \( 7.35 \) depicts the "Y" shaped cross-section of a thin-walled beam. The horizontal leg of the cross-section has a thickness \( 2 t \), whereas the other two legs are of thickness \( t \). (1) Determine the torsional stiffness of the section. (2) Determine the magnitude and location of the maximum shear stress if a torque \( Q \) is applied to the beam. (3) Sketch the shear stress distribution through the wall thickness. 7.5 Torsion of thin-walled open sections 295 Fig. 7.34. "H" cross-section of a thin-walled Fig. 7.35. "Y" cross-section of a thin-walled heam. heam.