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EADS CONTRIBUTION TO WP1

EADS CONTRIBUTION TO WP1. MATERIALS IDENTIFICATION AND DATABASE 4 th CASSEM MEETING July 13 th 2006. EADS CCR not formally involved in WP1, but: Use of visco analyser seems interesting in order to complete the material database Other contribution to active material characterisation.

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EADS CONTRIBUTION TO WP1

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  1. EADS CONTRIBUTION TO WP1 MATERIALS IDENTIFICATION AND DATABASE 4 th CASSEM MEETING July 13th 2006

  2. EADS CCR not formally involved in WP1, but: Use of visco analyser seems interesting in order to complete the material database Other contribution to active material characterisation General comments

  3. Objectives Experimental setup Results Conclusion Task 1.1 Sample level materials characterization: viscoelastic

  4. Computation of dynamic response of composite beam with viscoelastic core Comparison between various approaches (RTU, LPMM, ABAQUS) Comparison with experimental results performed at EADS CRC Motivation

  5. Composite beam Experiment Material Top layer Alu 2024 T6 Core ISD 112 Bottom layer Alu 2024 T6 Motivation

  6. Provide the partners with experimental results concerning ISD112 Supplier information provided in 1993 different from supplier information provided in 1999 Reading the nomograph doesn’t give precise information Values read in the nomograph do not correspond to values published in the litterature Motivation

  7. Strain sweep Temperature range: 0 °C to 100 °C Frequency range: [0.1 to 100 rad/s] Results needed: G’ and G’’ from 0 to 1000 Hz at 20 °C Test matrix

  8. Results ISD112 strain sweep 100 rad/s 30° ISD112 strain sweep 0.1 rad/s 30°

  9. Results ISD112 G’(f) ISD112 G’’(f)

  10. Horizontal and vertical shift, T0=60 ° WLF law law fitted Experimental results predicted at 20° till 1000 Hz Results Frequency temperature superposition

  11. Results Frequency temperature superposition

  12. Results Extrapolation to unmeasured frequencies

  13. Extrapolated values Extrapolation values at 20 ° large frequency range

  14. Extrapolated values Extrapolation values at 20 ° large frequency range

  15. Comparison with existing data The results differ significantly from published data

  16. Conclusion • Measured data was sent to partners involved by WP2 (LPMM, CRPHT and RTU) • Differences can be explained by the aging of the material, and the difficulty to obtain representative specimen (one specimen for each temperature) • Measurements on several specimen could be performed if necessary • Waiting for your comments/suggestions

  17. Objectives: precise characterisation of Macro Fiber Composite piezo actuators (especially in-plan transverse deformation) In collaboration with ULB (providing the actuators) Experimental setup Results Conclusion Task 1.1 Sample level materials characterization: piezoelectric

  18. Difficulty: allow for in-plane displacements/deformations without being perturbed by spurious out-of-plane displacement Experimental setup Partial clamping (shims allow sliding) MFC Actuator • Experimental method: non contact image correlation

  19. Electrical supply: stepped high voltage, between -500 and +500 V Experimental setup • Experimental data: dx, dy, exx, eyy, exy

  20. Result illustration • Deformation more difficult to obtain (differentiation of small quantities)

  21. Both clamping methods (partial clamping and free-free conditions) still exhibit spurious out-of-plane displacements: effects on in-plane measurements still to be evaluated Slightly different results between the two conditions Differences between results and actuator data sheet Perspective: modelling work in order to investigate the effect of boundary conditions and to choose the best configuration Open questions, further work

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