StressCheck Tutorial: Linear vs Nonlinear Results for a Single Lap Joint
Abstract: Comparison between linear, material nonlinear (plasticity effects) and general nonlinear (plasticity + geometric nonlinear effects) for a single lap joint under uniaxial load. Large deformations result for the linear analysis, including unrealistically large rotations at the adhesive, indicating geometric nonlinear analysis is required to represent the solution.
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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.”