Hindered crack propagation in materials with periodically varying Young's modulus - Lessons from biological materials

被引：226
作者：
Fratzl, Peter
Gupta, Himadri S.
Fischer, Franz Dieter
Kolednik, Otmar
机构：
[1] Max Planck Inst Colloids & Interfaces, Dept Biomat, D-14424 Potsdam, Germany
[2] Montan Univ Leoben, Inst Mech, A-8700 Leoben, Austria
[3] Austrian Acad Sci, Erich Schmid Inst Mat Sci, A-8700 Leoben, Austria
来源：
ADVANCED MATERIALS | 2007年 / 19卷 / 18期
关键词：
D O I：
10.1002/adma.200602394
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Many biological materials, such as glass sponges, nacre or bone have a lamellar structure. While it is well known that weak interfaces between lamellae may deflect cracks and, thus, increase the toughness, we analyze the influence of periodic variations in Young's modulus. Even without weak interfaces, a ratio of 5 between maximum and minimum modulus can be sufficient to stop a crack in the vicinity of the stiffness minimum.
引用
收藏
页码：2657 / +
页数：6
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