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Faculté des Sciences appliquées
Faculté des Sciences appliquées
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Implementation of The Arbitrary Lagrangian Eulerian Method in Soft Body Projectile Impacts Against Composite Plates

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Marquez Duque, Lucas ULiège
Promotor(s) : Le Sourne, Hervé
Date of defense : 2019 • Permalink : http://hdl.handle.net/2268.2/8626
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Title : Implementation of The Arbitrary Lagrangian Eulerian Method in Soft Body Projectile Impacts Against Composite Plates
Author : Marquez Duque, Lucas ULiège
Date of defense  : 2019
Advisor(s) : Le Sourne, Hervé 
Language : English
Discipline(s) : Engineering, computing & technology > Civil engineering
Target public : Researchers
Professionals of domain
Student
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master de spécialisation en construction navale
Faculty: Master thesis of the Faculté des Sciences appliquées

Abstract

[fr] Underwater Explosions (UNDEX) have been a subject of high interest not only for military organizations but also for commercial industry. The analytical and numerical tools that have been developed until these days have allowed studying the energy transport mechanisms occurred in UNDEX and its interaction with man-crafted structures, allowing also improving the structural scantlings and defense systems against these kinds of treats. Similar approaches can be used as well to study the instantaneous high-pressure impact loads such as slamming, which is one of the most important design loads in the vast majority of applications in naval engineering. However, performing experimental tests of these mechanisms is not only a costly but also a complicated process, due to the hazards involved in handling explosives and the limited organizations that have licenses to develop such tests.
Under the framework of Project SUCCESS, one of the main objectives is to study the response of Fiber Reinforced Polymers (FRP) structures subjected to slamming and UNDEX, therefore developing accurate calculation tools, which allow the designers to take into account these loads in the design of different naval components. One of the main challenges of the project is to include adequately the intra-laminar and inter-laminar damage mechanisms during these events, which is far more complex to the ones suffered by metallic materials. For these reasons, a series of experimental tests were performed in order to understand the dynamic behavior of FRP square plates subjected to soft body projectile impacts, while validating the numerical models developed.
The research performed in this Master thesis was focused in the use of Arbitrary Lagrangian Eulerian (ALE) methods for solving Fluid Structure Interaction (FSI) problems involving Soft Body Impacts on composite laminates, focusing mainly in the structural behavior of the plates during the impact, especially the intra-laminar damage mechanisms and its evolution. Simplified models of composite damage are used to predict the different phases of the plate response: elastic response, initiation of matrix cracking due to tension loads and finally fiber rupture. The initial results of the numerical models were used as a reference for the gas canon tests performed during the project campaign.


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