On the geometry of fracture and frustration

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On the geometry of fracture and frustration

Title: On the geometry of fracture and frustration
Author: Koning, Vinzenz
Publisher: Lorentz Center, Faculty of Science, Leiden University
Issue Date: 2014-11-26
Keywords: Nematic
Liquid
Crystal
Crack
Defect
Twist
Emulsion
Saddle-splay
Elasticity
Chirality
Abstract: Geometric frustration occurs when local order cannot propagate through space. A common example is the surface of a soccer ball, which cannot be tiled with hexaganons only. Geometric frustration can also be present in materials. In fact, geometry can act as an instrument to design the mechanical, optical or physical properties of fluids and solids. The first two parts of this thesis discuss frustrated liquid crystals confined to droplets of various shapes and sizes. The droplet shape determines the orientation of the liquid crystal molecules and in turn its response to light. In the final part we study the fracture mechanics of curved elastic plates. By tuning the curvature of the plate, the critical length at which the crack starts growing can be controlled. Finally, we find that the path that the crack takes depends on the curvature
Description: Promotor: M.L. van Hecke, Co-Promotor: V. Vitelli
With Summary in English
Citation: Koning, V., 2014, Doctoral Thesis, Leiden University
Series/Report no.: Casimir PhD Series, Delft-Leiden;2014-25
ISBN: 97879085931980
Sponsor: Stichting voor Fundamenteel Onderzoek der Materie
Handle: http://hdl.handle.net/1887/29873
 

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application/pdf Part I: Chapter 2 2.831Mb View/Open
application/pdf Part I: Chapter 3 8.776Mb View/Open
application/pdf Part II: Chapter 4 1.437Mb View/Open
application/pdf Part III: Chapter 5 627.1Kb View/Open
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application/pdf Appendices_Bibliography 804.8Kb View/Open
application/pdf Summary in Dutch 314.0Kb View/Open
application/pdf Curriculum Vitae_Publications 224.7Kb View/Open
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