Question

Consider an equal-leg angle section cantilever beam subject to a vertical shearing load at the tip where the line of action of the applied vertical force passes through the centroid. This beam will experience

• A. symmetrical bending with twist
• B. symmetrical bending without twist
• C. unsymmetrical bending and twisting
• D. unsymmetrical bending

Hint:

In beams with non-symmetric cross-sections, loads passing through the centroid can still cause unsymmetrical bending due to varying stiffness in different directions.

Answer 1

The Correct Option is D

Since the applied load is vertical and acts through the centroid of an equal-leg angle section, it primarily causes bending. The nature of the angle section (having different moments of inertia about its principal axes) leads to unsymmetrical bending. However, as the load passes through the centroid, it does not produce any twist.