Journal of Failure Analysis and Prevention

, Volume 16, Issue 3, pp 326–332 | Cite as

Mixed-Mode Crack Propagation in Cruciform Joint using Franc2D

Tools and Techniques

Abstract

The focus of this research was on determining the cracking behavior when parameter such as the biaxiality ratio was varied. The crack propagation under mixed-mode loading was simulated by means of finite element method. The stress intensity factors have been calculated by the linear elastic fracture mechanics approach using fracture analysis code-2D (Franc2D). The crack growth under opening mode-I was considered because the crack growth occurs mainly along the direction where the mode-I stress component becomes the maximum. The numerical integration of Paris’ equation was carried out. The effect of normal and transverse applied load (σ x, and σ y, respectively) on crack propagation was presented. It was found that the fatigue crack growth was faster at a smaller biaxial stress ratio (λ), i.e., higher σ y on the horizontal crack plan. Moreover, fatigue strength values decrease as λ decreases. The results confirm the use of fracture mechanics approach in biaxial fracture.

Keywords

Biaxial fatigue Biaxial stress ratio Cruciform joint Franc2D Mixed-mode fracture 

Notes

Acknowledgments

The author would like to thankfully appreciate the support received from the Technische Universität Bergakademie Freiberg, Faculty of Materials Science and Technology. The fruitful discussions with Prof. Dr.-Ing. habil. H. Biermann, and Dr.-Ing. S. Henkel, are also gratefully acknowledged. The kind support from Prof. Dr. habil. Broder J. Merkel, TU Freiberg, is highly appreciated.

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Copyright information

© ASM International 2016

Authors and Affiliations

  1. 1.Research FellowTechnische Universität Bergakademie FreibergFreibergGermany
  2. 2.Automated Manufacturing Engineering DepartmentAl-Khwarizmi College of Engineering, University of BaghdadBaghdadIraq

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