Roughening of fracture surfaces: The role of plastic deformation

被引：32

作者：

Bouchbinder, E ^{[1
]}

Mathiesen, J

Procaccia, I

机构：

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

[2] Niels Bohr Inst, DK-2100 Copenhagen, Denmark

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.92.245505

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Post mortem analysis of fracture surfaces of ductile and brittle materials on the mum-mm and the nm scales, respectively, reveal self-affine cracks with anomalous scaling exponent zetaapproximate to0.8 in three dimensions and zetaapproximate to0.65 in two dimensions. Attempts to use elasticity theory to explain this result failed, yielding exponent zetaapproximate to0.5 up to logarithms. We show that when the cracks propagate via plastic void formations in front of the tip, followed by void coalescence, the void positions are positively correlated to yield exponents higher than 0.5.

引用

页码：245505 / 1

页数：4

共 16 条

[1] FINITE-ELEMENT ANALYSIS OF VOID GROWTH NEAR A BLUNTING CRACK TIP [J].