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Published on: January 16, 2019
Propagation of Fatigue Cracks in Friction of Brittle Hydrogels
Tetsuo Yamaguchi1,2, Ryuichiro Sato3, Yoshinori Sawae4,5
1Department of Mechanical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan. yamaguchi@mech.kyushu-u.ac.jp.
Abstract:
In order to understand fatigue crack propagation behavior in the friction of brittle hydrogels, we conducted reciprocating friction experiments between a hemi-cylindrical indenter and an agarose hydrogel block. We found that the fatigue life is greatly affected by the applied normal load as well as adhesion strength at the bottom of the gel⁻substrate interface. On the basis of in situ visualizations of the contact areas and observations of the fracture surfaces after the friction experiments, we suggest that the mechanical condition altered by the delamination of the hydrogel from the bottom substrate plays an essential role in determining the fatigue life of the hydrogel.
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