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A study of secondary instabilities in postbuckling composite aerostructures

Published online by Cambridge University Press:  03 February 2016

B. G. Falzon  and
M. Cerini
B. G. Falzon
Affiliation:
Department of Aeronautics, Imperial College, London, UK
M. Cerini
Affiliation:
Adams Kara Taylor, London, UK
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Abstract

A number of experimental studies have shown that postbuckling stiffened composite panels, loaded in uniaxial compression, may undergo secondary instabilities, characterised by an abrupt change in the buckled mode-shape of the skin between the supporting stiffeners. In this study high-speed digital speckle photogrammetry is used to gain further insight into an I-stiffened panel’s response during this transient phase. This energy-dissipating phenomenon will be shown to be able to cause catastrophic structural failure in vulnerable structures. It is therefore imperative that an accurate and reliable methodology is available to predict this phenomenon. The shortcomings of current non-linear implicit solution schemes, found in most commercially-available finite element codes, are discussed. A robust and efficient strategy, which utilises an automated quasi-static/pseudo-transient hybrid scheme, is presented in this paper and validated using a number of experimental tests. This approach is shown to be able to predict mode-jumping with good accuracy.

Type
Research Article
Information
The Aeronautical Journal , Volume 111 , Issue 1125 , November 2007 , pp. 715 - 729
Copyright
Copyright © Royal Aeronautical Society 2007 

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References

1. Falzon, B.G. and Steven, G.P.. Buckling mode transition in hat-stiffened composite panels loaded in uniaxial compression, Compos Struct, 1997, 37, (2), pp 253–267.Google Scholar
2. Falzon, B.G., Stevens, K.A. and Davies, G.A.O.. Postbuckling behaviour of a blade-stiffened composite panel loaded in uniaxial compression, Compos Part A: Appl Sci Manuf, 2000, 31, (5), pp 459–468.Google Scholar
3. Stevens, K.A., Ricci, R. and Davies, G.A.O.. Buckling and postbuckling of composite structures, Composites, 2001, 26, (3), pp 189–199.Google Scholar
4. Falzon, B.G.. The behaviour of damage tolerant hat-stiffened composite panels loaded in uniaxial compression, Compos Part A: Appl.Sci Manuf, 2001, 32, (9), pp 1255–1262.Google Scholar
5. Falzon, B.G. and Hitchings, D.. Capturing mode-switching in postbuckling composite panels using a modified explicit procedure, Compos Struct, 2003, 60, (4), pp 447–453.Google Scholar
6. Falzon, B.G. and Cerini, M.. An automated hybrid procedure for capturing mode-jumping in postbuckling composite stiffened structures, Compos Struct, 2006, 73, (2), pp 186–195.Google Scholar
7. Starnes, J.H., Knight, N.F. and Rouse, M.. Postbuckling behaviour of selected flat stiffened graphite-epoxy panels loaded in compression, AIAA J, 1985, 23, (8), pp 1236–1246.Google Scholar
8. Romeo, G.. Experimental investigation on advanced composite stiffened structures under uniaxial compression and bending, AIAA J, 1986, 24, (11), pp 1823–1830.Google Scholar
9. Lanzi, L.. A numerical and experimental investigation on composite stiffened panels into post-buckling, Thin Wall Struct, 2004, 42, pp 1645–1664.Google Scholar
10. Caputo, F., Esposito, R., Perugini, P. and Santoro, D.. Numerical-experimental investigation on post-buckled stiffened composite panels, Compos Struct, 2002, 55, (3), pp 347–357.Google Scholar
11. Group of Personalities, European Aeronautics: A Vision for 2020, 2001, Office for Official Publications of the European Communities, Belgium.Google Scholar
12. Romeo, G. and Frulla, G.. Non-linear analysis of anisotropic plates with initial imperfections and various boundary conditions subjected to combined biaxial compression and shear loads, Int J Solids Struct, 1994, 31, (6), pp 763–783.Google Scholar
13. Wempner, G.A.. Discrete approximations related to nonlinear theories of solids, Int J Solids Struct, 1971, 7, 1581–1599.Google Scholar
14. Riks, E.. An incremental approach to the solution of snapping and buckling problems, Int J Solids Struct, 1979, 15, pp 529–551.Google Scholar
15. Crisfield, M.A.. A fast incremental/iterative solution procedure that handles ‘snap-through’, Comput Struct, 1981, 13, pp 55–62.Google Scholar
16. Riks, E., Rankin, C.C. and Brogan, F.A.. On the solution of mode-jumping phenomena in thin-walled shell structures, Comput Meth Appl M, 1996, 136, (1), pp 59–92.Google Scholar
17. Singer, J., Arbocz, J. and Weller, T., Buckling Experiments: Experimental Methods in Buckling of Thin Walled Structures, 1998, Vol 1, John Wiley & Sons, Chichester, UK.Google Scholar
18. Bushnell, C., Rankin, C. and Riks, E.. Optimization of stiffened panels in which mode-jumping is accounted for, 1998, in Stability Analysis of Plates and Shells: A Collection of Papers in Honor of Dr. Manuel Stein, NASA/CP-1998-206280, pp 105–145.Google Scholar
19. ARAMIS: Deformation measurement using the grating method, 200, GOM, Braunschweig, Germany.Google Scholar
20. Cerini, M.. Investigation of Secondary Instabilities in Postbuckling Stiffened Composite Structures, 2005, PhD thesis, Imperial College London, UK.Google Scholar
21. Falzon, B.G. and Hitchings, D., An Introduction to Modelling Buckling and Collapse, 2006, NAFEMS, Glasgow, UK.Google Scholar
22. Batoz, J.L. and Dhatt, G.. Incremental displacement algorithms for non-linear problems, Int J Numer Meth Eng, 1979, 14, pp 1262–1266.Google Scholar
23. Crisfield, M.A., Non-linear Finite Element Analysis of Solids and Structures, 1991: Vol 1, John Wiley & Sons Ltd, Chichester, UK.Google Scholar
24. Bisagni, C.. Numerical analysis and experimental correlation of composite shell buckling and post-buckling, Compos Part B-Eng, 2000, 31, (8), pp 655–667.Google Scholar
25. Crisfield, M.A., Non-linear Finite Element Analysis of Solids and Structures, 1997, Vol 2, John Wiley & Sons Ltd, Chichester, UK.Google Scholar
26. Fujii, F., AND Noguchi, H., The buckling mode extracted from the LDLT-decomposed larger-order stiffness matrix, Commun Numer Meth En, 2002, 18, (7), pp 459–467.Google Scholar
27. Cerini, M., Falzon, B.G. and Hitchings, D., FE77XM User Manual, 2005, Imperial College London.Google Scholar
28. Falzon, B.G., Hitchings, D. and Besant, T.. Fracture mechanics using a 3D composite element, Compos Struct, 1999, 45, (1), pp 29–39.Google Scholar