Propagation of Fatigue Cracks in Friction of Brittle Hydrogels
Propagation of Fatigue Cracks in Friction of Brittle Hydrogels
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DOI：
10.3390/gels4020053
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发表时间：
2018-06
期刊：
影响因子：
4.6
通讯作者：
Tetsuo Yamaguchi;Ryuichiro Sato;Y. Sawae
中科院分区：
文献类型：
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作者：
Tetsuo Yamaguchi;Ryuichiro Sato;Y. Sawae
为了了解脆性水凝胶在摩擦中的疲劳裂纹扩展行为，我们进行了半圆柱压头和琼脂糖水凝胶块之间的往复摩擦实验。我们发现，疲劳寿命很大程度上受到所施加的法向载荷，以及在底部的凝胶-基板界面的粘合强度。摩擦实验后的断裂表面的接触区域和观察的原位可视化的基础上，我们建议，由从底部基板的水凝胶的分层改变的机械条件起着至关重要的作用，在确定的疲劳寿命的水凝胶。
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.