StressCheck Tutorial: TLAP-Bearing Default vs Ignore Moments & Offsets (IMO) Case Study
For a case study of an aircraft fitting with loaded lug bores, the maximum 1st principal stress at the lug root and the part deformation for TLAP-Bearing: Default and TLAP-Bearing: IMO (Ignore Moments & Offsets) was studied. The differences can be significant if the locations of the TLAPs are far away from the midplanes and/or centers of the bores, and/or if there are input moments in the fastener loads.
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The software provides a highly reliable and user-friendly production stress analysis tool that will replace the Finite Element Method (FEM) tools and failure criteria the experts currently employ for analyzing bonded joints. The software includes an FEM-based handbook format, which allows non-experts to utilize models prepared by specialists. The handbook problems include built-in failure criteria, geometric and material nonlinearities, and the modern FEM technology provides better error control and the treatment of very large aspect ratios.”
Dr. Stephen P. EngelstadTechnical Fellow, Lockheed Martin Aeronautics Company, Structural Methods and Analysis