Strength of Materials

SALIENT POINTS

• A member is considered to be under torsion if it transmits the moments of a couple in a direction normal to the plane of the couple.
• Torsion is one of the four basic modes by which loads are transmitted from one portion of a structural or machine member to another.
• The intensity of shear stress induced at any point in the cross section of a circular shaft subjected to a couple is proportional to its distance from the centre.
• The maximum torque or horse power that can be transmitted by a shaft is referred to as the strength of a shaft.
• Torque required for unit twist is called the torsional stiffness.
• The quantity (GI_p)/l is known as the torsional rigidity and is represented by k, where G is the rigidity modulus, I_p is the polar ...