Analysis on stiffness and frictional effect of water hydraulic artificial muscle by pseudo-static isobaric experiments

Hou, Jian; Li, Peipei; Che, Jinkai; Zhang, Zengmeng; Gong, Yongjun

doi:10.1109/fpm45753.2019.9035717

Cited by 1 publication

(2 citation statements)

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“…The ultimate contraction rate ε is 36% when the WHAM contracts at an unloaded state. 39,40 Therefore, taking contraction rates ε as 10%, 20%, and 30%, the corresponding strain energy densities À W ε are 252, 466, and 707 kJÁm À3 , respectively. Meanwhile, combined with Equations (2.6), (2.9), and (2.10), the fatigue life of rubber tubes in WHAMs is 3.65 Â 10 8 times, 2.49 Â 10 7 times, and 4.08 Â 10 6 times, respectively.…”

Section: Fatigue Behavior Of Rubber Tubementioning

confidence: 99%

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Analysis on fatigue behavior of water hydraulic artificial muscles under different elastic loads in underwater environment

Zhang

Che

et al. 2023

Fatigue Fract Eng Mat Struct

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As 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.

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Section: Fatigue Behavior Of Rubber Tubementioning

confidence: 99%

“…The ultimate contraction rate ε is 36% when the WHAM contracts at an unloaded state 39,40 . Therefore, taking contraction rates ε as 10%, 20%, and 30%, the corresponding strain energy densities − W ε are 252, 466, and 707 kJ·m −3 , respectively.…”

Section: Theoretical Analysis On Fatigue Behavior Of Whammentioning

confidence: 99%