Strength of Wire Rope under Dynamic Load

Abstract

In order to investigate the behavior of wire rope under the dynamic load, we experimented with a drop hammer type impact tester, which was of our own design, and discussion was made on the impact breaking strength and the absorption of energy of wire ropes, comparing with those obtained by static tests.In this paper we report how the breaking strength and absorption of energy are influenced by the impact speed and the length of wire rope. The results can be summarized as follows:Under the test conditions:Length of wire rope varying from 500mm to 2000mm, Impact speed varying from 3.8m/s to 6.9m/s, 1) As the impact speed is increased or as the specimen becomes shorter, the breaking strength increases.2) As the impact speed is increased or as the specimen becomes shorter, the inclination of stress-strain diagram augments, and absorption of energy decreases.3) Absorption of energy is not so markedly influenced by the impact speed within the range of this experiments, but when the rope is extremely short, then it decreases very rapidly.