Vol. 2, No. 9, 2007

Download this article
Download this article For screen
For printing
Recent Issues

Volume 12
Issue 3, 249–351
Issue 2, 147–247
Issue 1, 1–146

Volume 11, 5 issues

Volume 10, 5 issues

Volume 9, 5 issues

Volume 8, 8 issues

Volume 7, 10 issues

Volume 6, 9 issues

Volume 5, 6 issues

Volume 4, 10 issues

Volume 3, 10 issues

Volume 2, 10 issues

Volume 1, 8 issues

The Journal
Cover
Editorial Board
Research Statement
Scientific Advantage
Submission Guidelines
Submission Form
Subscriptions
Author Index
To Appear
 
ISSN: 1559-3959
Serration effects on interfacial cracks

Assimina A. Pelegri and Baoxiang X. Shan

Vol. 2 (2007), No. 9, 1773–1785
Abstract

To investigate the effect of serrations in an interfacial crack between dissimilar materials, we introduce into the Finite Element (FE) framework a unit cell (UC) at microscale. By assigning material-specific properties to these unit cells, we can model various serration profiles and distributions and calculate their effect on the mixed-mode stress intensity factor (SIF), including its magnitude and phase angle. The simulation demonstrates that serration profoundly changes the local behavior of an interfacial crack. The serrations decrease the SIF in mode I, increase it in mode II, and, when the serration’s height-to-width ratio increases, the mode mixity SIF increases as well. We find that sparse serration confines variation in the SIFs to the local peaks and that dense serrations cause widespread undulations in the SIF’s magnitude and phase angle.

Keywords
bimaterial, composites, interfacial crack, materials, mechanics, mixed mode, stress intensity factors, unit cells
Milestones
Received: 4 January 2007
Accepted: 31 May 2007
Published: 1 November 2007
Authors
Assimina A. Pelegri
Mechanical and Aerospace Engineering
School of Engineering
Rutgers, The State University of New Jersey
98 Brett Road
Piscataway, NJ 08854-8058
United States
Baoxiang X. Shan
Mechanical and Aerospace Engineering
School of Engineering
Rutgers, The State University of New Jersey
98 Brett Road
Piscataway, NJ 08854-8058
United States