Simulation of cracking of metal alkoxide gel film formed on viscous precursor layer using a spring-block model

被引：2

作者：

Jogi, J. ^{[1
]}

Jaervekuelg, M. ^{[1
]}

Kalda, J. ^{[2
]}

Salundi, A. ^{[1
]}

Reedo, V. ^{[1
]}

Lohmus, A. ^{[1
]}

机构：

[1] Univ Tartu, Inst Phys, EE-51014 Tartu, Estonia

[2] Tallinn Univ Technol, CENS, Inst Cybernet, EE-12618 Tallinn, Estonia

来源：

EPL | 2011年 / 95卷 / 06期

关键词：

THIN-FILMS; COLLOIDAL SUSPENSION; PATTERNS; FRACTURE; STRESS; ROUGHNESS; SHRINKAGE; EVOLUTION;

D O I：

10.1209/0295-5075/95/64005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Drying-induced cracking of thin films attached to a non-solid (viscous) substrate is studied both experimentally and numerically. The numerical model is essentially a modification of the spring-block model, introducing a shear stress due to faster drying of the upper film layer, and annealed disorder in the distribution of the spring strengths. The simulation results are in a qualitative agreement with the experimental results, covering all the qualitatively different experimental regimes of the fragment formation. The model allows us to identify the physical processes responsible for the formation of micro-tubes in our experiments, and is helpful in designing and interpreting the film cracking experiments. Copyright (C) EPLA, 2011

引用

页数：6