Refined theories and Discontinuous Galerkin methods for the analysis of multilayered composite structures
type: CreativeWork
description: Laminated multilayered composite and sandwich plates and shells are widely used for military and civilian aircraft, aerospace vehicles, and naval and civil structures because of their high specific stiffness and strength and tailoring capabilities. Moreover, composite materials are increasingly adopted for primary load-bearing structures in the form of thick laminates with a large number of layers. Those structures are subjected to complicated load paths and may exhibit critical deformation effects due to transverse shearing and transverse-normal stretching, with the consequential susceptibility to environmental and inter-laminar damage effects. One of the key aspects of the analysis of composite structures is the accurate prediction of the stress field; it can be obtained employing several numerical methods that can provide very detailed results at an high computational cost. This approach is well suited for small parts but cannot be applied to complex structures or for damage-tolerance analysis. Thus, accurate and computationally efficient models are required for the design and analysis of multilayered composites. Moreover, multilayered composites are affected by intelaminar damage that is one of the major reasons of failure. Since the delamination's presence has to be taken into account, damage tolerance analysis have to be carried out in order to understand the structure's capabilities to continue bearing loads without incurring in critical failure. The crack-growth simulation is a challenging task for the finite element method because it involves domain's separation and stress singularities at the crack tip. It is therefore necessary to introduce methods that account for crack-tip singularities and that allow to model both the initiation and the crack-growth process. The present work is divided into two main parts: in the fist one, going from chapter 2 to chapter 5, Refined Zigzag Theory, RZT, is introduced and employed formulate and develop plate and shell fin…
abstract: Laminated multilayered composite and sandwich plates and shells are widely used for military and civilian aircraft, aerospace vehicles, and naval and civil structures because of their high specific stiffness and strength and tailoring capabilities. Moreover, composite materials are increasingly adopted for primary load-bearing structures in the form of thick laminates with a large number of layers. Those structures are subjected to complicated load paths and may exhibit critical deformation effects due to transverse shearing and transverse-normal stretching, with the consequential susceptibility to environmental and inter-laminar damage effects. One of the key aspects of the analysis of composite structures is the accurate prediction of the stress field; it can be obtained employing several numerical methods that can provide very detailed results at an high computational cost. This approach is well suited for small parts but cannot be applied to complex structures or for damage-tolerance analysis. Thus, accurate and computationally efficient models are required for the design and analysis of multilayered composites. Moreover, multilayered composites are affected by intelaminar damage that is one of the major reasons of failure. Since the delamination's presence has to be taken into account, damage tolerance analysis have to be carried out in order to understand the structure's capabilities to continue bearing loads without incurring in critical failure. The crack-growth simulation is a challenging task for the finite element method because it involves domain's separation and stress singularities at the crack tip. It is therefore necessary to introduce methods that account for crack-tip singularities and that allow to model both the initiation and the crack-growth process. The present work is divided into two main parts: in the fist one, going from chapter 2 to chapter 5, Refined Zigzag Theory, RZT, is introduced and employed formulate and develop plate and shell fin…
author: VERSINO, DANIELE
language: eng
keywords: Discontinuous Galerkin, zig-zag theory, composite structure, delamination mechanism, Settore ING-IND/04 - Costruzioni e Strutture Aerospaziali
date published: 2012
date modified: 2026-07-24T03:51:05Z
provider: Politecnico di Torino
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Politecnico di Torino

PropertyValue
property ID: Handle
value: http://hdl.handle.net/11583/2497085