Stress Intensity Solutions for Corner and Through-the-Thickness Cracks at a U-Shaped Notch (Preprint)
AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AEROSPACE SYSTEMS DIR
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Stress intensity factor solutions for corner and through cracks growing from a u-shaped edge notch are required to improve the accuracy of damage tolerance analyses for continuing damage scenarios. Closed-form K-solutions for through-the-thickness and corner cracks under remote axial loading were developed using 3-D finite element FE models for wide plates. Finite width corrections were determined based on FE models for a wide range of finite plate geometries. The finite width models included boundary conditions with and without far edge constraints as an option to account for in-plane bending due to geometric asymmetry. The resulting solutions are valid for notch depths resulting from equivalent hole edge distances eD from 0.0 to 49.5.