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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“As the United States Air Force continues to extend the service life of their aircraft the Aircraft Structural Integrity Program (ASIP) has had to refine the methods it uses to analyze and predict fatigue crack growth. Through the use StressCheck®, coupled with AFGROW, we in A-10 ASIP have been able to more accurately model, predict and analyze critical aircraft structure for the A-10 and other types of structure for non-A-10 system managers. This also allows us within the A-10 to more accurately assess risk for decision makers, streamline aircraft inductions into scheduled maintenance and reduce cost for total life cycle management.”
A-10 ASIP Manager