Fatigue of double-network hydrogels
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Fatigue of double-network hydrogels
- 发表刊物：
- Engineering Fracture Mechanics
- 摘要：
- The discovery of tough hydrogels of many chemical compositions, and their emerging
applications in medicine, clothing, and engineering, has raised a fundamental question:
How do hydrogels behave under many cycles of stretch? This paper initiates the study
of the fatigue behavior of the classic PAMPS/PAAM double network hydrogels discovered
by Gong and her co-workers [25]. We reproduce the hydrogels, and prepare samples of
two types, with or without a crack cut before the test. When an uncut sample is subject
to cyclic stretches, internal damage accumulates over thousands of cycles until a steady
state is reached. When a cut sample is subject to cyclic stretches, the crack extends cycle
by cycle if the amplitude of stretch is above a certain value. A threshold of energy release
rate exists, below which the crack remains stationary as the sample is cycled. We find a
threshold around 400 J/m2 for hydrogels containing PAAM networks of a low density of
crosslinkers, and around 200 J/m2 for hydrogels containing PAAM networks of a high density
of crosslinkers. The experimental findings are compared to the Lake-Thomas model
adapted to the double-network hydrogels.
- 合写作者：
- Zhang, WL; Liu, X; Wang, JK; Tang, JD; Hu, J; Lu, TQ; Suo, ZG
- 是否译文：
- 否
- 发表时间：
- 2017-10-26