Indexed by:Journal Article

First Author:Chang Xin

Correspondence Author:Ren, MF (reprint author), Dalian Univ Technol, Dept Engn Mech, Dalian 116024, Peoples R China.; Ren, MF (reprint author), Dalian Univ Technol, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China.

Co-author:Guo Xu,Ren Mingfa

Date of Publication:2017-10-01

Journal:JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY

Included Journals:Scopus、EI、SCIE

Document Type:J

Volume:31

Issue:10

Page Number:4763-4769

ISSN:1738-494X

Key Words:Cohesive zone model; Finite element analysis; Fractal; Self-similar fractal crack

Abstract:Cracks in the nature have been proven to be fractal by many experiments. Despite the fractal fracture mechanics has been developed by many researchers, fractal geometry still has few applications in analysis of engineering structures. One of the reasons is that previous studies are somehow inconvenient when apply, e.g. to the finite element method. This study proposes a Cohesive zone model (CZM) for self-similar fractal crack propagation of material interfaces. The determination of the CZM parameters and the simulation of fractal crack propagation are developed by replace the fractal crack with the equivalent smooth crack. The fractal dimension has effects on both the crack extension resistance and the max traction stress. As shown by the simulation of a DCB specimen, the fractal dimension also affect the ultimate load and the crack propagation process. It is shown that it is possible to predict the propagation of fractal cracks without considering geometric modeling of the crack topology by our cohesive zone model.