StressCheck Tutorial: Computation of Kt and Crack Initiation Beta Factor for a 2D Notched Plate in Tension
Abstract: Modeling and analysis of a Planar specimen with a circular notch for a) stress concentration factor (Kt) computation and b) stress intensity factor (SIF) computation for an initial flaw size at the root of the circular notch. The SIF can then be converted to a beta factor for use in fatigue life calculations in other software tools.
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“At DST Group, we have effectively used StressCheck® over the last 10 years to determine accurate stress intensity factors. The results have been used to improve our residual strength and structural life estimates for aircraft in service with the Royal Australian Airforce, including C-130, P-3C and F/A-18 A/B. We have found it to be extremely easy to use and a very versatile code with which to create parametric models.
We have recently used StressCheck® to obtain improved stress intensity factor solutions (Improved stress intensity factors for selected configurations in cracked plates and Improved stress intensity factors for a single corner crack at a loaded fastener hole) for five key generic configurations. These transferable parametric results have been published externally. One specific example is the non-linear contact analysis of a cracked, filled fastener hole, with both fastener and remote plate loading.”
Dr. Manfred Heller, HeadStructural & Damage Mechanics, DST Group