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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“A screening of existent commercial and non-commercial tools was carried out in respect to their fracture mechanics capabilities, their design abilities, implementation as well as their complexity. Although, there are many software possibilities, only those within the reach of the author were evaluated. This resulted in the selection of the commercial tool StressCheck®. The assessment of crack propagation on compact tension and two stringer specimens governed by the Paris and Forman regimes was satisfactory compared with experimental results using the material data from simple standard specimens.”
Lloren Llopart Prieto (EADS)Doctoral Thesis, "Modelling and analysis of crack turning on aeronautical structures"