StressCheck Tutorial: Computation of Cross Section Centroid
Abstract: Using intrinsic functions SPCTRX, SPCTRY and SPCTRZ to compute the global X, Y, Z locations of a cross section centroid. The locations are computed through the application of a “dummy” traction (with X=SPCTRX/SPAREA, Y=SPCTRY/SPAREA and Z=SPCTRZ/SPAREA) to the surface or surfaces representing the cross section, and then performing a load check to return the X, Y, Z locations of the centroid.
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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