Computational Mechanics

, Volume 52, Issue 4, pp 799–814 | Cite as

Fatigue crack growth simulations of interfacial cracks in bi-layered FGMs using XFEM

  • S. Bhattacharya
  • I. V. Singh
  • B. K. Mishra
  • T. Q. Bui
Original Paper

Abstract

An investigation of fatigue crack growth of interfacial cracks in bi-layered materials using the extended finite element method is presented. The bi-material consists of two layers of dissimilar materials. The bottom layer is made of aluminium alloy while the upper one is made of functionally graded material (FGM). The FGM layer consists of 100 % aluminium alloy on the left side and 100 % ceramic (alumina) on the right side. The gradation in material property of the FGM layer is assumed to be exponential from the alloy side to the ceramic side. The domain based interaction integral approach is extended to obtain the stress intensity factors for an interfacial crack under thermo-mechanical load. The edge and centre cracks are taken at the interface of bi-layered material. The fatigue life of the interface crack plate is obtained using the Paris law of fatigue crack growth under cyclic mode-I, mixed-mode and thermal loads. This study reveals that the crack propagates into the FGM layer under all types of loads.

Keywords

Bi-layered FGM Interface crack  Extended finite element method  Fatigue crack propagation 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • S. Bhattacharya
    • 1
  • I. V. Singh
    • 1
  • B. K. Mishra
    • 1
  • T. Q. Bui
    • 2
  1. 1.Department of Mechanical and Industrial EngineeringIITRoorkeeIndia
  2. 2.Department of Civil EngineeringUniversity of SiegenSiegenGermany

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