Journal of Failure Analysis and Prevention

, Volume 19, Issue 2, pp 387–393 | Cite as

Mixed-Mode Stress Intensity Factor Estimation of Inclined Cracks in an Unnotched Round Bar

  • S. Suresh KumarEmail author
  • M. E. Aniruthan
Technical Article---Peer-Reviewed


The extent on mixed-mode stress intensity factor (SIF) of inclined multiple cracks in an unnotched bar has been investigated numerically. Opposite cracks with various crack depth ratios (a/d), crack aspect ratios (a/c) and inclination angles (θ) were considered. The geometry correction factor (Y) was calculated by considering the effect of mode-II and mode-III fracture. It was observed that, for short cracks [(a/d) = 0.1], as the inclination angle increases, SIF of mode-I decreases and conversely mode-III SIF increases. For short cracks in crack-2, as the inclination angle increases, the mode-I SIF decreases similar to crack-1, but the SIF of mode-III decreases as well. The mode-III contributes to a significant amount of SIF owing to the inclination of the crack. Regardless of the inclination angle, with an increase in the aspect ratio [a/c], the mode-I and mode-III SIF for both crack-1 and crack-2 decreases.


Multiple cracks Stress intensity factor Mixed mode Crack inclination Crack aspect ratio Crack depth ratio 



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© ASM International 2019

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringSSN College of EngineeringChennaiIndia
  2. 2.Department of Mechanical EngineeringAnand Institute of Higher TechnologyChennaiIndia

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