Programm Photovoltaik Ausgabe 2009 ... - Bundesamt für Energie BFE

Task 12. Combination of environmental and mechanical loads
The effect of heat (induced due to the solar cells) was evaluated after thermal testing. An increase of
around 20°C of the surface temperature of the foam-core sandwich panels was recorded independently
of the used solar cells.
Task 13. Lifetime prediction and guidelines
A fatigue life prediction methodology is under development. It is able to account for the effect of variable
amplitude loading of complex stress states on the fatigue behavior of the examined material or
structural component. The minimum input of experimental data, loading spectra plus basic information
about the fatigue behavior of the material under constant amplitude loading patterns, is needed for the
execution of the methodology. Initial comparison of the theoretical predictions to available experimental
data proves the validity of the methodology.
Ackowledgements
Funding : CTI - discovery program (project 8002.1 DCS-NM)
EPFL Pr. J.-A. Månson (LTC and VPIV), P. Vuilliomenet (VPIV)
J. Rion, C. Erlandsson, S. Stutz, L. Lalande, M.I. Placencia (LTC)
Pr. M. Grätzel, P. Liska (LPI)
Pr. Hirt, A. Nussbaumer (ICOM)
Pr. Th. Keller, T. Vallee, A. Vasilopoulos (CCLab)
Pr. A. Quarteroni, Ch. Prud’homme, G. Fourestey (CMCS)
FLEXCELL A. Closset, D. Fischer, F. Galliano
Solar Impulse A. Borschberg, M. Basien
Solvay-Solexis J.M. Blairon, P. Toniolo, S. Padmanabhan
Publications & conferences
� Rion J., Ultra-light photovoltaic composite sandwich structures, PhD thesis EPFL, no 4138 (2008).
� Rion J., Leterrier Y., Månson J.-A.E., ‘Prediction of the Adhesive Fillet Size for Skin to Honeycomb
Core Bonding in Ultra-Light Sandwich Structures’, Compos. Part A, 39, 1547-1555 (2008).
� Rion J., Stutz S., Leterrier Y., Månson J.-A.E., ‘Influence of Process Pressure on Local Facesheet
Instability for Ultralight Sandwich Structures’, Proc. 8th International Conference on Sandwich
Structures, ICSS 8, Porto, May 6-8 (2008) and Journal of Sandwich Structures and Materials (Accepted).
� Rion J., Leterrier Y., Demarco F., Månson J.-A. E. ‘Damage Analysis of Ultralight Composite
Sandwich Structure’, Proc. ICCM16, Kyoto, July 8-13 (2007).
� Rion J., Leterrier Y., Månson J.-A.E., ‘Ultralight Composite Sandwich Structure: Optimization of
Skin to Honeycomb Core Bonding’, Proc. 27th International Conference SAMPE Europe 2006,
Paris, March 27-29 (2006).
� H.M. Upadhyaya, S. Ito, S. Calnan, J. Bowers, G. Khrypunov, P. Comte, P. Liska, K.R. Thampi,
M. Graetzel and A.N. Tiwari, ‘New Strategies to Obtain Flexible Dye Sensitized Solar Cells’, 21st
European Photovoltaic Solar Energy Conference, 4-8 September 2006, Dresden, Germany, pp.
103-106.
� Till Vallée, Thomas Keller, Gilles Fourestey, Benjamin Fournier, João R. Correia, Adhesively
Bonded Joints Composed of Pultruded Adherends: Considerations at the Upper Tail of Material
Strength Statistical Distribution, submitted to Probabilistic Engineering Mechanics, July 2007.
� Rion J., Leterrier Y., Månson J.-A.E., ‘Ultra-Light Asymmetric Photovoltaic Sandwich Structures’
submitted to Compos. Part A.
Ultralight Photovoltaic Structures, Y. Leterrier, EPFL
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