Paper Title:
Influence of Residual Stresses on Threshold Values for Crack Propagation Through an Interface Between Two Materials
  Abstract

The article deals with the behaviour of a fatigue crack propagating across a bi-material interface. A stability criterion for the crack touching the bi-material interface, taking into account the residual stresses closing the crack faces is formulated. The linear elastic fracture mechanics is assumed to apply and the finite element method is used in the calculations. The criterion proposed is applied to determine the fatigue threshold stress for crack propagation across the interface. It is shown that the threshold values for crack propagation are influenced by the residual stresses closing the crack and by the specific combination of the elastic constants of the materials used. The results contribute to a better understanding of the failure of structures with bi-material interfaces (protective layers, composite materials, etc.).

  Info
Periodical
Key Engineering Materials (Volumes 324-325)
Edited by
M.H. Aliabadi, Qingfen Li, Li Li and F.-G. Buchholz
Pages
1153-1156
DOI
10.4028/www.scientific.net/KEM.324-325.1153
Citation
L. Náhlík, P. Hutař, Z. Knésl, "Influence of Residual Stresses on Threshold Values for Crack Propagation Through an Interface Between Two Materials ", Key Engineering Materials, Vols. 324-325, pp. 1153-1156, 2006
Online since
November 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jia Zhen Zhang, Xiao Dong He, Shan Yi Du
Abstract:In-situ SEM observations have revealed that fatigue crack propagation in aluminium alloys is caused by the shear band decohesion around the...
293
Authors: Jaroslav Pokluda, Yoshiyuki Kondo, Karel Slámečka, Pavel Šandera, Jana Horníková
Abstract:Asymmetric arrangements of stored crack-wake dislocations and low values of the size ratio SR, the plastic zone size / the characteristic...
49
Authors: Stanislav Seitl, Pavel Hutař, Zdeněk Knésl
Abstract:The formulations of fatigue crack growth prediction are still mostly based on phenomenological models. A commonly used formula in the field...
557
Authors: F. Ricci, F. Franco, Nicola Montefusco
Abstract:In this paper, the mechanisms of propagation of the damage in aluminum panels repaired with bonded composite patches of different mechanical...
597
Authors: Jun Ru Yang, Gong Ling Chen, Li Li Zhang, Jing Sun
VI. Analytical and Numerical Methods for Materials Processing
Abstract:Based on the theoretical study on the tip stress intensity factor (SIF) of the crack normal to and dwelling on the interface, using the...
525