Helpful Hints and Tips: Elliptical Crack Automeshing Guidelines
This document contains practical guidelines for the automeshing of elliptical or semi-elliptical cracks in StressCheck, balancing best practices with mesh density and solve time. These guidelines are most applicable when the crack front curve object is of type ellipse (i.e. “ELL”). For a curve object type of spline (i.e. “BSP”) or other, a similar process can be followed to generate reasonable automeshes for the computation of fracture mechanics parameters.
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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