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Mixed-Mode Crack Propagation in Cruciform Joint using Franc2D

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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.

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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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  1. Research Fellow, Technische Universität Bergakademie Freiberg, Akademiestraße 6, 09599, Freiberg, Saxony, Germany

    A. M. Al-Mukhtar

  2. Automated Manufacturing Engineering Department, Al-Khwarizmi College of Engineering, University of Baghdad, Baghdad, Iraq

    A. M. Al-Mukhtar

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Correspondence to A. M. Al-Mukhtar.

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Al-Mukhtar, A.M. Mixed-Mode Crack Propagation in Cruciform Joint using Franc2D. J Fail. Anal. and Preven. 16, 326–332 (2016). https://doi.org/10.1007/s11668-016-0094-1

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