Mechanical response of foams : elasticity, plasticity, and rearrangements

Leiden Repository

Mechanical response of foams : elasticity, plasticity, and rearrangements

Type: Doctoral Thesis
Title: Mechanical response of foams : elasticity, plasticity, and rearrangements
Author: Deen, M.S. van
Journal Title: Casimir PhD Series
Issue Date: 2016-11-09
Keywords: Foam
Jamming
Elasticity
Plasticity
Abstract: A foam is not a homogeneous material, but consists of a large number of small air bubbles. The whole is more than the sum of its parts: even though the behavior of a single bubble is easy to understand, their collective behavior is much more complicated and completely different. The reason for this is that a deformation of the whole is only reflected partially in the deformation of individual bubbles. Instead, a large part of the deformation is reflected in a change in the structure of the foam. In this thesis, we investigate this change in structure. In the first part of this thesis, we use a simple microscopic computer model to simulate the response of a foam when it is deformed by a tiny amount, and measure how far we need to deform the foam until it is irreversibly deformed. In the second part of this thesis, we focus on an experiment, where we measure the response of a two-dimensional foam when it is deformed at the edges. We observe that the response of bubbles in the center of the foam qualitatively depends on how densely the bubbles are packed together.
Promotor: Supervisor: M.L. van Hecke
Faculty: Science
University: Leiden
Uri: urn:isbn:9789085932741
Handle: http://hdl.handle.net/1887/40902
 

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application/pdf Chapter 1 Introduction 2.367Mb View/Open
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application/pdf Publication list_Curriculum Vitae_Acknowledgements 187.8Kb View/Open
application/pdf Bibliography 236.1Kb View/Open
application/pdf Supplementary material 135.0Kb View/Open
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