Helpful Hints and Tips: 3D Stiffened Lug Stress + Crack SIF Analyses
This end-to-end (E2E) example focus on importing a 3D stiffened lug, performing a detailed stress analysis, and extracting the location of the maximum 1st principal stress in the lug. Then, the example continues into a fracture mechanics analysis where an elliptical crack is embedded at the location of the maximum 1st principal stress, the model is re-solved, and stress intensity factors (SIF’s) are extracted.
Note: the ZIP file contains two PDF’s and a Parasolid (.x_t) file.
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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