Effect of elastic constants on crack channeling in a thin film bonded to an orthotropic substrate

Title
Effect of elastic constants on crack channeling in a thin film bonded to an orthotropic substrate
Authors
범현규
Keywords
Channeling crack · Bimaterial structure · Orthotropic material · Energy release rate · Material parameter
Issue Date
2013
Publisher
ARCHIVE OF APPLIED MECHANICS
Series/Report no.
ARCHIVE OF APPLIED MECHANICS; vol.83 startpage 1577 endpage 1589
Abstract
A channeling crack confined in an orthotropic film bonded to an orthotropic substrate under a steady-state condition is investigated. The problem is formulated based on a modified Stroh formalism and an orthotropy rescaling technique, in order to determine the necessary material parameters required to describe the steady-state energy release rate. A closed form of the energy release rate is obtained with the exception of the normalized energy release rate for the transformed bimaterial structure that consists of the orthotropic film and isotropic substrate. The normalized energy release rates for the transformed problem are shown to depend on only four material parameters and are numerically calculated using finite element analyses. The periodic channels in the film layer of the bimaterial structure are also considered. The steady-state energy release rates for the periodic channeling cracks are obtained as a function of the ratio of the film thickness to the crack spacing for various combinations of the material parameters.
URI
http://dspace.inha.ac.kr/handle/10505/31537
ISSN
0939-1533
Appears in Collections:
College of Engineering(공과대학) > Mechanical Engineering(기계공학) > Local Access Journal Papers, Reports(기계공학 논문, 보고서)

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse