Vibration and stress analysis of orthotropic laminated panels by active face prismatic finite element. (15th July 2020)

• Record Type: Journal Article
• Authors: Carrazedo, Rogério; Paccola, Rodrigo Ribeiro; Coda, Humberto Breves; Salomão, Rafael Correa
• Is Part Of: Composite structures. Volume 244(2020)
• Publication Date: 2020-07-15
• Subjects: Finite element method -- Positional formulation -- Active face prismatic element -- Honeycomb-shape reinforcement -- Sandwich plates and shells; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2020.112254
• Languages: English
• ISSNs: 0263-8223

Abstract

Highlights: Sandwich composite plates and shells. Active face prismatic FE based on positions. Core stiffening honeycomb cell. Exact geometrical nonlinear analysis. Displacement and stress calculations. Natural Frequencies of Honeycomb sandwich plates. Abstract: In this paper a strategy for the stress analysis of sandwich plates and shells employing the active face triangular-based prismatic finite element is provided, which combines three-dimensional membrane elements (called active face) with solid elements providing stiffening cells, usually called honeycomb. The connection of solid and active face elements is done by direct nodal correspondence, keeping the total number of degrees of freedom unaltered, which makes the technique highly economical from the numerical point of view. Orthotropic properties are specially addressed, which are important for material failure criteria studies. The accuracy of the active face prismatic finite element is also evaluated in the calculation of natural frequencies of honeycomb sandwich panels for acoustic vibration isolation purposes, for instance. Results for orthotropic sandwich plates and shells are presented and compared with established commercial software and literature results.