Investigating the Strain Behaviour of Dyneema under Cyclic Loads

抄録

Synthetic ropes are becoming increasingly popular in robotic systems nowadays. Especially since the introduction of low creep materials, many researchers have tried to investigate the usage of these ropes in robots to replace the old conventional steel ropes that are being used to date. Synthetic bre ropes possess many other benets than steel ropes than just tensile strength like low friction coecient, exibility, longer life if used properly. Amongst the existing low creep synthetic ropes, Dyneema is widely used. In related works, researchers studied the behaviour of Dyneema and other materials under impact and static loading but there hasn’t been any study of Dyneema under cyclic loading which is the scenario in robots. In this paper, we investigate the strain curve of a tendon made from Dyneema DM20 rope by performing a bedding-in process and then subjecting the tendon to cyclic loads between 70 N to 2000N for 500 cycles.