Abstract
Arecently developed nonlinear approach is adapted and used to predict crack initiation in stringer terminations of discretely assembled composite panels made from skin and stiffeners. A linear elastic fracture mechanics based submodel is used to simulate the crack initiation in the critical regions and the influence of ply drop-off is captured. The von Kármán formulation for moderately large deflections in plates is used to capture the nonlinear structural behavior; three-dimensional assemblies are schematized and the effect of eccentricity is included in the simulation. An optimum design criterion is sought and basic guidelines for good design are provided. Furthermore, a method for preliminary assessment of structural strength is proposed and predictions are validated against detailed nonlinear finite element analysis
Translated title of the contribution | A non-linear analytical approach for preliminary sizing of diecrete composite stringer terminations |
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Original language | English |
Pages (from-to) | 606 - 617 |
Number of pages | 12 |
Journal | AIAA Journal |
Volume | 43 (3) |
DOIs | |
Publication status | Published - Mar 2009 |