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##### STP868

### Stress Distribution at the Tip of Cracks Originating from a Circular Hole under Biaxial Loads

**Abstract**

The stress distribution at the tip of cracks originating from a circular hole under biaxial loads was examined. It was found that a numerical stress function can be developed, which when employed in the stress analysis of the neighborhood of the crack tip of this geometry, results in accurate evaluation of the crack-tip stress and displacement field. Some predictions of the fracture mechanical behavior of this geometry were then made based on these stress and displacement field representations.

The path-independent *J*-integral energy approach was used in examining the effect of the applied biaxial loads on this parameter. It was found that applied biaxial loads do affect the path independent *J*-integral taken around the crack tip. The direct relationship between the stress intensity factor and the *J*-integral which holds for line crack was found to be applicable to this geometry.

**Keywords:**

stress function, stresses, displacements, stress intensity factor, nonsingular stresses, nonsingular displacement, angle of initial crack extension, isochromatic fringes, J, -integral

**Author Information:**

Oladimeji, MK

*Senior Engineer, Applied Physics Department, Advanced Technology Division, Ebasco Services Inc., New York, NY*

**Committee/Subcommittee:** E08.05

**DOI:** 10.1520/STP34246S

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