Crack Propagation Analysis Tool for 3D Crack Simulation: A Simulation App Case Study
Abstract: This 2 hour course will provide instructions for using the Crack Propagation Analysis Tool (CPAT) to simulate 3D crack growth at a fastener hole in a fatigue test specimen. Residual stresses due to cold-working of the hole are taken into account. CPAT provides an easy-to-use interface which significantly reduces the manual effort involved in complex crack growth simulations using the finite element method. Finite element solutions are computed using the StressCheck solver, renowned in the aerospace finite element analysis community for extracting high quality stress intensity factors (SIFs) for complex parts and assemblies.
Originally presented as a training course at the 2017 ASIP conference in Jacksonville, FL.
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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