Affiliation:
1. College of Naval Architecture and Ocean Engineering Dalian Maritime University Dalian China
2. Liaoning Provincial Key Laboratory of Rescue and Salvage Engineering Dalian Maritime University Dalian China
3. International Joint Research Center for Subsea Engineering Technology and Equipment Dalian Maritime University Dalian China
Abstract
AbstractAs a novel and flexible actuator, the water hydraulic artificial muscle (WHAM) has become at the forefront of bionic robot research. In order to explore the fatigue behavior of WHAM, the lifetime of WHAM was analyzed based on the crack propagation of neoprene rubber and the S‐N curve of aramid fiber. Meanwhile, WHAM's fatigue tests were carried out, and the fatigue life exceeded 56,000 cycles under the pressure of 2 MPa and the elastic load of 1030.7 N/mm. In addition, WHAM's fatigue failure is represented as the burst of the rubber tube after fiber fracture. Moreover, heavy load aggravates fibrillation that leads to severe fracture of fibrils under similar friction, and the fatigue life of WHAM is aggravatingly shortened by the coupling of fibrillation and friction. Finally, an empirical model of fatigue life was obtained, which can predict the lifetime of WHAM.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Liaoning Province
Fundamental Research Funds for the Central Universities
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science