STRESS INTENSITY FACTOR FOR DOUBLE EDGE CRACKED FINITE PLATE SUBJECTED TO TENSILE STRESS

  • Najah Rustum Mohsin outhern Technical University, Technical Institute-Nasiriya, Mechanical Technics Department.
  • Lattif Shekher Jabur Southern Technical University, Technical Institute-Nasiriya, Mechanical Technics Department.
Keywords: Double edge crack, SIF, crack oblique, ANSYS R15, kinked

Abstract

A finite rectangular plate with double edge crack under uniaxial tension depends on the
assumptions of Linear Elastic Fracture Mechanics LEFM and plane strain problem are studied
in the present paper. The effect of crack position, crack oblique and the kinked crack orientation
are investigated to predict if a crack starts to grow. These problems are solved by calculating
the Stress Intensity Factor SIF for mode I (KI) and II (KII) near the crack tip theoretically using
mathematical equations and numerically using finite element software ANSYS R15. A good
agreement is observed between the theoretical and numerical solutions. The results show that
the KI increases with increasing the relative crack length and tensile stress and these values are
increased when the cr   mutual shielding effect reduces KI in each crack. In mixed mode, it is shown that the mack position draws near the plate edge while in case of parallel cracks theaximum
values of KI and KII occur at crack angle β=0
o
and 45
o
, respectively and the orientation of the
kinked crack have significant effects on the KI and KII
Published
2019-04-17
Section
Articles