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Characterization and optimization of dispersed composite laminates for damage resistant aeronautical structures

The main objective of the thesis is to assess the damage resistance and damage tolerance of the non-conventional dispersed laminates and compare the response with the conventional ones. However, part of the effort is spent on understanding the delamination behavior in multidirectional laminates. In the first part of the thesis, the delamination in multidirectional laminates is studied. The objective is to design a proper stacking sequence, capable of avoiding intralaminar damage (crack jumping), to enable the fracture toughness characterization under pure mode I. The result of this study shows that the higher the crack arm bending stiffness, the lower the tendency to crack jumping. This phenomenon is also studied experimentally and the same conclusion is drawn.

El principal objectiu de la tesi 茅s valorar la resist猫ncia al dany i la toler脿ncia al dany dels laminats no-convencionals dispersos i comparar la seva resposta amb la dels laminats convencionals. No obstant, part de l鈥檃tenci贸 es dedica a comprendre el comportament de la delaminaci贸 en laminats multidireccionals. En la primera part de la tesi, s鈥檃nalitza la delaminaci贸 en laminats multidireccionals. L鈥檕bjectiu 茅s dissenyar una seq眉猫ncia d鈥檃pilament apropiada per evitar el dany intralaminar (migraci贸 de la delaminaci贸) i permetre la caracteritzaci贸 de la tenacitat a la fractura en model. Els resultats d鈥檃quests estudi mostren que a major rigidesa a flexi贸 dels bra莽os de l鈥檈squerda, menor 茅s la tend猫ncia a la migraci贸 de l鈥檈squerda. Aquest aspecte tamb茅 s鈥檋a analitzat experimentalment, obtenint les mateixes conclusions.

Universitat de Girona

Manager: Blanco Villaverde, Norbert
Lopes, Cl谩udio Sa煤l
Other contributions: Universitat de Girona. Departament d鈥橢nginyeria mec脿nica i de la construcci贸 industrial
Author: Sebaey Abdella, Tamer Ali Abdella
Date: 2013 January 11
Abstract: The main objective of the thesis is to assess the damage resistance and damage tolerance of the non-conventional dispersed laminates and compare the response with the conventional ones. However, part of the effort is spent on understanding the delamination behavior in multidirectional laminates. In the first part of the thesis, the delamination in multidirectional laminates is studied. The objective is to design a proper stacking sequence, capable of avoiding intralaminar damage (crack jumping), to enable the fracture toughness characterization under pure mode I. The result of this study shows that the higher the crack arm bending stiffness, the lower the tendency to crack jumping. This phenomenon is also studied experimentally and the same conclusion is drawn.
El principal objectiu de la tesi 茅s valorar la resist猫ncia al dany i la toler脿ncia al dany dels laminats no-convencionals dispersos i comparar la seva resposta amb la dels laminats convencionals. No obstant, part de l鈥檃tenci贸 es dedica a comprendre el comportament de la delaminaci贸 en laminats multidireccionals. En la primera part de la tesi, s鈥檃nalitza la delaminaci贸 en laminats multidireccionals. L鈥檕bjectiu 茅s dissenyar una seq眉猫ncia d鈥檃pilament apropiada per evitar el dany intralaminar (migraci贸 de la delaminaci贸) i permetre la caracteritzaci贸 de la tenacitat a la fractura en model. Els resultats d鈥檃quests estudi mostren que a major rigidesa a flexi贸 dels bra莽os de l鈥檈squerda, menor 茅s la tend猫ncia a la migraci贸 de l鈥檈squerda. Aquest aspecte tamb茅 s鈥檋a analitzat experimentalment, obtenint les mateixes conclusions.
Format: application/pdf
Document access: http://hdl.handle.net/10803/98393
Language: eng
Publisher: Universitat de Girona
Subject: Enginyeria. Tecnologia
Enginyeria mec脿nica en general. Tecnologia nuclear. Electrot猫cnia. Maquin脿ria
Title: Characterization and optimization of dispersed composite laminates for damage resistant aeronautical structures
Type: doctoralThesis
Repository: TDX

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