Hierarchic Modeling Example: Attachment Lug
Abstract: Hierarchic modeling of an attachment lug to determine the simplest model required for the detailed stress analysis. The following hierarchic modeling assumptions were explored:
- Model 1: 2D plane-stress. Bearing load simulated with sinusoidal traction – Thickness effects are ignored
- Model 2: 3D Analysis. Bearing load simulated with sinusoidal traction – Removes limitation of Model 1
- Model 3: 3D-Contact analysis. Loaded by pin bearing – Removes limitation of assumed bearing load distribution
The objective was to find the maximum normal stress in the lug component.
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“Accurate and reliable stresses and Stress Intensity Factors are required for determination of static and residual strength and for crack growth analyses in analysis tools such as AFGROW. For some geometries, industry solutions are either insufficient or nonexistent. The geometry, applied forces, and crack shapes and dimensions must be modeled reasonably well to obtain useful engineering data. The p-version finite element software StressCheck® (ESRD, Inc., St. Louis, Missouri, USA) is used to demonstrate how accurate finite element solutions can lead to good quality engineering analysis.”