Fatigue fracture of tough hydrogels

By Ruobing Bai, Quansan Yang, Jingda Tang, X. Morelle, J. Vlassak, Zhigang Suo. 2017

265 citations recorded by the source corpus.

Abstract Tough hydrogels of many chemical compositions have been developed in recent years, but their fatigue fracture has not been studied. The lack of study hinders further development of hydrogels for applications that require long lifetimes under cyclic loads. Examples include tissue engineering, soft robots, and stretchable electronics. Here we study the fatigue fracture of a polyacrylamide–alginate tough hydrogel. We find that the stress–stretch curve changes cycle by cycle, and reaches a steady state after thousands of cycles. The threshold for fatigue fracture is about 53 J/m 2 , much below the fracture energy ( ∼ 10,000 J/m 2 ) measured under monotonic load. Nonetheless, the extension of crack per cycle in the polyacrylamide–alginate tough hydrogel is much smaller than that in a single-network polyacrylamide hydrogel.

Subfields: Biomaterials, Biomedical Engineering, Molecular Medicine

View Paper: https://www.semanticscholar.org/paper/6ef85fad4a617ff6b299652b06f5b9cace5eb2a6

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Biomaterials

1. Jingda Tang
2. Jian Hu
3. Zhigang Suo

In Biomedical Engineering

1. Tongqing Lu
2. Jingda Tang
3. Zhigang Suo
4. Xuanhe Zhao
5. Wei Hong
6. Jian Zhu
7. Shengqiang Cai
8. Christoph Keplinger

In Molecular Medicine

1. Jingda Tang
2. Zhigang Suo
3. Jikun Wang
4. Xiao Liu
5. Jian Hu
6. Tongqing Lu
7. Wenlei Zhang
8. Zishun Liu

Citations in the corpus

• Fatigue of double-network hydrogels (2017, methodology): “This procedure gives the thresholds of fatigue fracture as 418 J/m2 for the hydrogels prepared using the solution of 2 M AAM, 413 J/m2 for 3M AAM, and 411 J/m2 for 4 M AAM.”