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Boeing 767-400ER Raked Winglet

Summary. . Summary:A sensitivity analysis of the Boeing 767-400ER raked winglet front spar was performed using process modelling (COMPRO) to study the effect of material and process variables on flange spring-in. Model predictions were in good agreement with experimental results and the simulations

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Boeing 767-400ER Raked Winglet

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Presentation Transcript

    1. Title

    2. Summary

    3. Boeing 767-400ER raked winglet

    4. 767-400ER winglet design options

    5. Spar configuration

    6. Dimensional control and assembly

    7. 767-400ER raked winglet analysis A large sensitivity analysis of the proposed process was performed using design of experiments (virtual experiments) Flange spring-in angles were calculated along the length of the spar Predicted spring-in angles together with measurements on prototypes served as a basis for the manufacture of the production tool

    8. Flow chart of analysis approach Goals of process simulations Develop understanding of the process Identify main drivers for spring-in and warpage Verify model predictions with measurements

    9. Predicted deformations (COMPRO output) preliminary analysis

    10. Preliminary analysis

    11. Factors used in numerical DOE Process factors Cross-section (Root, Tip) Toggle radius Flange length Tool thermal mass (solid, hollow core) Heat-up rate Material factors Cure kinetics Modulus development Resin CTE Cure shrinkage Resin viscosity

    12. FE meshes of spar cross-sections (part only)

    13. FE meshes of spar cross-sections (hollow and solid core)

    14. FE meshes of spar cross-sections (toggle radius)

    15. FE meshes of spar cross-sections (flange length)

    16. High and low settings of material factors

    17. Results from numerical DOE

    18. Comparison of predicted and measured spring-in

    19. Recommended tool compensation factor

    20. Outcome

    21. Summary

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