Conference Presentation: A System for Simulation Governance of Engineered Repairs of Composite Aircraft Structures
Abstract: Modern military aircraft = composite skins + metallic sub-structure. Verification of structural integrity of standard repairs is costly, and requires structural and strength analysis. Traditional closed-form analysis techniques are unrepresentative and unsuitable, but construction of detailed finite element models requires Finite Element Analysis (FEA) expertise. Therefore, computational system with these requirements is needed to accelerate decision-making:
- Validated/certified methods
- Closed-form and FEA-based
- Readily employed
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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.”