Flexural/Twist Anisotropy Influence on Elastic Instability of a Plate Composite Laminate

Abstract:

Article Preview

The flexural/twist anisotropy, present in most balanced, symmetric laminates with angle play layers, have an important influence on elastic instability of plate composite. The maximal compression load can be reduced up to 13% in comparison with the orthotropic plate. The anisotropy changes also the deformation mode form. Based on the finite element studies, we developed an empirical law – the relation between the knockdown factor, the anisotropy factor and the plate geometry. The knockdown factor is defined as the ratio between the maximum loads of the anisotropic plate and of the orthotropic one. In this way, the semi-analytic instability calculation approach is based on analytical linear bifurcation theory with orthotropic properties and on empirical consideration of the flexural/twist anisotropy effect by the knockdown factor.

Info:

Periodical:

Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

777-780

DOI:

10.4028/www.scientific.net/MSF.561-565.777

Citation:

J. Raška "Flexural/Twist Anisotropy Influence on Elastic Instability of a Plate Composite Laminate", Materials Science Forum, Vols. 561-565, pp. 777-780, 2007

Online since:

October 2007

Authors:

Export:

Price:

$35.00

[1] Weaver, P. M.: Anisotropy-Induced Spiral Buckling in Comprssion-Loaded Cylindrical Shells, AIAA Journal, Vol. 40, No. 5, (May 2002).

DOI: 10.2514/3.15152

[2] Flanagan, G., Meyers, C.: Instability Consideration, Engineering Mechanics, Analysis and Design, Vol. 32, No. 6, (Juin 2006).

[3] Berthelot, J. -M.: Matériaux composites - Comportement mécanique et analyse des structures, (ISBN: 2-225-82588-2, Masson, Paris, 1992).

[4] Gay, D.: Matériaux composites, (ISBN: 2-86601-268-2, Masson, Paris 1991).

[5] York, C. B.: Elastic buckling design curves for isotropic rectangular plates with continuity or elastic edge restraint against rotation , The Aeronauticat Journal, No. 2494, (April 2000).

[6] Tiwari, N.: Secondary Buckling of Compresion-Loaded Composite Plates, AIAA Journal, Vol. 40, No. 10, (October 2002).

[7] Rohwer, K., Albat, A., Steck, E.: Buckling of CFRP plates with partly detashed stringers, Z. Flugwiss. Welraumfosch, Vol. 18, (1994).

[8] Abrate S., On the use of Levy's method for symmetricaly laminates composite plates, Composites, Vol. 24, No. 8, (1993).

In order to see related information, you need to Login.