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Tensinet Symposium 2010, 16.-17. September 2010, Sofia, Bulgaria Straight and curved: Recent developments with Tensairity ® Rolf H. Luchsinger Center for.

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Presentation on theme: "Tensinet Symposium 2010, 16.-17. September 2010, Sofia, Bulgaria Straight and curved: Recent developments with Tensairity ® Rolf H. Luchsinger Center for."— Presentation transcript:

1 Tensinet Symposium 2010, September 2010, Sofia, Bulgaria Straight and curved: Recent developments with Tensairity ® Rolf H. Luchsinger Center for Synergetic Structures EMPA, Swiss Federal Laboratories for Materials Testing and Research Überlandstrasse 129, CH-8600 Dübendorf, Switzerland

2 Introduction

3 Tensairity telescope enclosure, 12m, Tenerife, Spain, 2008, Airlight Ltd

4 Introduction Tensairity roof 38 m, National Tennis Center, London, 2010, Airlight Ltd

5 Straight I: Tensairity column p = 150 mbar Plagianakos TS, Teutsch U, Crettol R & Luchsinger RH. Static response of a spindle-shaped Tensairity column to axial compression. Engineering Structures 31, (2009) 5 m span, 16 kg mass, 11 kN max load

6 Wever TE, Plagianakos TS, Luchsinger RH, Marti P. Effect of fabric webs on the static response of spindle- shaped Tensairity columns. Journal of Structural Engineering ASCE 136(4), , (2010). Straight I: Tensairity column plain spindle web spindle Stiffness: +100 %, Buckling load: +40%

7 Tension/compression elements: Fabric: (~10 kN/m) Air pressure: (~ mbar) Deflection: H ? (Experiments, FEM) Straight II: Tensairity beam - Basic principles

8 Compact transport, fast set up, light weight Straight II: Tensairity beam

9 High load bearing capacity Straight II: Tensairity beam

10 Beam on elastic foundation with compressive forces k = ? Tensairity beam: Analytical model

11 Two coupled ODE´s Tensairity beam: Analytical model

12 BC: Determination of H Tensairity beam: Analytical model

13 q=1 kN/m, (slenderness) Approximation Tensairity beam: Analytical model

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15 Straight III: Tensairity “madraz”

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17 Dimension: 3 x 0.5 x 0.25 m Weight: 6.1 kg (3.7 kg metal kg hull) = 4 kg/m 2 Load: 3.6 kN, 2.4 kN/ m 2, L/D = 60 Deflection: 23 mm, L/128 Straight III: Tensairity “madraz” web - Tensairity

18 Beam theory: p = 150 mbar Straight III: Tensairity “madraz”

19 Straight IV: Foldable Tensairity De Laet L, Luchsinger RH, Crettol R, Mollaert M, De Temmermann N. Deployable Tensairity Structures. Journal of the International Association for Shell and Spatial Structures 50 (2), (2009)

20 Curved I: Tensairity arch ABAQUS/Explicit

21 Curved I: Tensairity arch

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32 10 m span, 90 kg mass, 3.5 ton max load HP Gasser AG

33 Curved II: Tensairity kite 8 m span, 11m 2 area, 3 kg mass, 1 kN max load Breuer JMC, Luchsinger RH, “Inflatable kites using the concept of Tensairity”. Aerospace Science and Technology. doi: /j.ast (2010)

34 Curved and Straight: Tensairity actuator Luchsinger RH, Bräker M. A novel pneumatic actuator with Tensairity. In: Brebbia CA (ed.), Design & Nature V, , WIT Press, Southampton (2010)

35 - Recently major steps in the R&D of Tensairity have been done - Close interaction between models, experiments, FEM and analysis - Dedicated team Conclusion

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