Drying patterns: Sensitivity to residual stresses

被引：14

作者：

Cohen, Yossi ^{[1
]}

Mathiesen, Joachim ^{[2
]}

Procaccia, Itamar ^{[1
]}

机构：

[1] Weizmann Inst Sci, Dept Chem Phys, IL-76100 Rehovot, Israel

[2] Univ Oslo, N-0316 Oslo, Norway

来源：

PHYSICAL REVIEW E | 2009年 / 79卷 / 04期

关键词：

complex networks; cracks; drying; elasticity; internal stresses; CRACK PATTERNS; FRACTURE;

D O I：

10.1103/PhysRevE.79.046109

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Volume alteration in solid materials is a common cause of material failure. Here we investigate the crack formation in thin elastic layers attached to a substrate. We show that small variations in the volume contraction and substrate restraint can produce widely different crack patterns ranging from spirals to complex hierarchical networks. The networks are formed when there is no prevailing gradient in material contraction, whereas spirals are formed in the presence of a radial gradient in the contraction of a thin elastic layer.

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