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TsAGI Science Journal

ISSN Print: 1948-2590
ISSN Online: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2018026282
pages 661-664

LAMINATED COMPOSITE STIFFNESS AND STRENGTH ESTIMATION METHOD

Vladimir Dmitrievich Vermel
Central Aerohydrodynamic Institute (TsAGI) Zhukovsky str. 1, Zhukovsky, 140180 Russia
Aleksander Ivanovich Oleinikov
Central Aerohydrodynamic Institute (TsAGI), 1, Zhukovsky Str., Zhukovsky, Moscow Region, 140180, Russian Federation
Leonid Leonidovich Chernyshev
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky St., Zhukovsky, Moscow Region, 140180, Russia

ABSTRACT

An approximate analytical design model of laminated fiber-reinforced plates and shells composed of unidirectional monolayers is experimentally justified. In this model, the main contribution to stiffness is assumed to be made by the fibers, and strength is estimated from the condition of fiber rupture or buckling. The influence of the dependence of the elasticity modulus on the stress sign and the effects of symmetric and balanced reinforcing is evaluated. Calculated estimates are compared with experimental data, and a calculation example of sequential failure of carbon fiber-reinforced polymer layers under conditions of tension, compression, and shear loading is analyzed.


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