Delayed fracture of an inhomogeneous soft solid

被引：179
作者：
Bonn, D
Kellay, H
Prochnow, M
Ben-Djemiaa, K
Meunier, J
机构：
[1] Ecole Normale Super, Phys Stat Lab, F-75231 Paris 05, France
[2] Univ Bordeaux 1, Ctr Phys Mol Opt & Hertzienne, F-44305 Talence, France
来源：
SCIENCE | 1998年 / 280卷 / 5361期
关键词：
D O I：
10.1126/science.280.5361.265
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The spontaneous fracture of polymer gels was studied. Contrary to crystalline solids, where fracture usually happens instantaneously at a well-defined breaking strength, the fracture of a polymer gel can occur with a delay. When a constant force was applied, the cracks nucleated and started to propagate after a delay that can be as long as 15 minutes, depending on the force. This phenomenon can be understood by calculating the activation energy for crack nucleation in arbitrary dimension and accounting for the inhomogeneity of the gel network in terms of its fractal dimension.
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页码：265 / 267
页数：3
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