Repulsion and Attraction between a Pair of Cracks in a Plastic Sheet

被引：20

作者：

Dalbe, Marie-Julie ^{[1
,2
]}

Koivisto, Juha ^{[3
]}

Vanel, Loic ^{[2
]}

Miksic, Amandine ^{[3
]}

Ramos, Osvanny ^{[2
]}

Alava, Mikko ^{[3
]}

Santucci, Stephane ^{[1
]}

机构：

[1] Univ Lyon, UMR CNRS 5672, Ecole Normale Super Lyon, Phys Lab, F-69364 Lyon 07, France

[2] Univ Lyon 1, CNRS, UMR5306, Inst Lumiere Mat, F-69622 Villeurbanne, France

[3] Aalto Univ, Dept Appl Phys, COMP Ctr Excellence, Espoo 00076, Finland

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 20期

基金：

芬兰科学院;

关键词：

OVERLAPPING SPREADING CENTERS; INTERACTING CRACKS; GROWTH; LINKAGE; PROPAGATION; EVOLUTION; FRACTURE; MODELS; ORIGIN; FILMS;

D O I：

10.1103/PhysRevLett.114.205501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the interaction of two collinear cracks in polymer sheets slowly growing towards each other, when submitted to uniaxial stress at a constant loading velocity. Depending on the sample's geometry-specifically, the initial distances d between the two cracks' axes and L between the cracks' tips-we observe different crack paths with, in particular, a regime where the cracks repel each other prior to being attracted. We show that the angle theta characterizing the amplitude of the repulsion-and specifically its evolution with d-depends strongly on the microscopic behavior of the material. Our results highlight the crucial role of the fracture process zone. At interaction distances larger than the process zone size, crack repulsion is controlled by the microscopic shape of the process zone tip, while at shorter distances, the overall plastic process zone screens the repulsion interaction.

引用

页数：5

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