Bending a wire rope over a small diameter sheave/pulley can reduce the effective strength by what percentage?

Bending a wire rope over a small diameter sheave or pulley can significantly impact its effective strength due to the increased bending stresses placed on the rope. When the rope is bent sharply, the outer fibers might undergo tension while the inner fibers experience compression. This stress distribution can lead to the weakening of the rope's strands, ultimately reducing its load-carrying capacity.

The correct percentage reduction in effective strength for this situation is 50%. This figure reflects the adverse effects of bending on the wire rope's structural integrity. At such a degree of bending, the rope can experience not only immediate weakening but also long-term damage that compromises its ability to perform safely. Recognizing such reductions is critical in selecting appropriate equipment and ensuring safe operating conditions in the field.