Machines. Technologies. Materials.
Vol. 19 (2025), Issue 6, pg(s) 221-224

TECHNOLOGIES

Stress intensity factor in rods under tension with twin semielliptical cracks

  • 1 University of Slavonski Brod, Croatia
  • 2 Industrial and Trade School Slavonski Brod, Croatia

Abstract

This study investigates the influence of distance and relative orientation of semi-elliptical twin surface cracks in cylindrical bars under tensile loading on the stress intensity factors (SIF). Finite element analysis was used to analyze the interactions between two identical cracks with different spacing (5-20 mm) and rotation angles (0°-180°). The results show that the crack orientation has a significant effect on the stress distribution patterns and stress intensity factor values, with a 45° rotation producing the highest SIF values, while a parallel orientation has a favorable shielding effect with significantly lower values. All configurations gradually converge to the reference value for a single crack at larger distances (20 mm), indicating decreasing interaction effects. These results can provide insights for the assessment of structural integrity, especially for components with multiple closely spaced defects, and provide a basis for the development of more accurate predictive models for fracture behavior in engineering applications.

Keywords

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