The paper proposes a limit analysis approach to define the ultimate load capacity of orthotropic composite laminates under biaxial loading and plane stress conditions. A lower bound to the collapse load multiplier is computed by solving a maximization nonlinear problem, according to the static theorem of limit analysis. To set up the optimization problem a stress field distribution is hypothesized at lamina level, moreover inter-lamina stresses are also considered. The effectiveness and validity of the proposed approach is shown by comparing the obtained numerical predictions both with available experimental data and with other numerical results carried out by means of a different numerical lower bound approach.

Collapse load of composite laminates: lower bound evaluation by stress field analytical approximation / Bouabid, A; De Domenico, D; Pisano, Aurora Angela; Limam, O. - In: COMPOSITES. PART B, ENGINEERING. - ISSN 1359-8368. - 75:(2015), pp. 345-354. [10.1016/j.compositesb.2015.01.041]

Collapse load of composite laminates: lower bound evaluation by stress field analytical approximation

PISANO, Aurora Angela;
2015-01-01

Abstract

The paper proposes a limit analysis approach to define the ultimate load capacity of orthotropic composite laminates under biaxial loading and plane stress conditions. A lower bound to the collapse load multiplier is computed by solving a maximization nonlinear problem, according to the static theorem of limit analysis. To set up the optimization problem a stress field distribution is hypothesized at lamina level, moreover inter-lamina stresses are also considered. The effectiveness and validity of the proposed approach is shown by comparing the obtained numerical predictions both with available experimental data and with other numerical results carried out by means of a different numerical lower bound approach.
2015
Laminates; Numerical Analysis; Lower bound
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12318/1811
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