The distribution of the contact forces on steel wire ropes

The distribution of the contact forces on steel wire ropes

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The influence of the contact pressures between rope and sheaves on the endurance of ropes is unmistakable. When these stress influences are taken into consideration various problems arise [1], so the selection of the model for stress calculations led and is still leading to comprehensive discussions . The distribution of the contact force among the wires, which come in contact with the sheaves, however has received less attention. With regard to this Wijss speaks of " an approximately equal force per wire " [2] . This assumption however requires a peculiar transverse stiffness of the rope. The rope cross section must accommodate itself to the shape of the groove, which has a radius being 5% greater than the radius of the rope, however it must still resist equal contact forces at each of the bearing surfaces. Bechtloff [3] developed a model for transverse forces on wire ropes, which also led to the conclusion that the contact forces on the wires in contact with the sheave were nearly equal.

Author: L. Wiek