Use this URL to cite or link to this record in EThOS: https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.746355
Title: Mathematical theory of shells on elastic foundations : an analysis of boundary forms, constraints, and applications to friction and skin abrasion
Author: Jayawardana, K.
ISNI:       0000 0004 7231 2433
Awarding Body: UCL (University College London)
Current Institution: University College London (University of London)
Date of Award: 2016
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Abstract:
In this thesis we examine the behaviour of shells supported by elastic foundations. We begin by critically analysing the existing literature on the study of thin objects such as films, plates, membranes and shells, and we highlight their limitations, validity and present correct formulations when possible. We also do the same for various frictional laws, in particular, Coulomb's law of static friction. Then, we extend the capstan equation to noncircular geometries by modelling membranes supported by rigid foundations in presence of friction. We provide closed-form solutions and compare them to other similar existing models in the literature. Then, we begin the study of shells supported by elastic foundations. We treat the bonded case as a boundary form and prove the existence and the uniqueness of solutions, and thus, prove it is a mathematical theory and not merely a mathematical model. To conclude this case we conduct numerical experiments and compare the results against existing models in the literature. Finally, we introduce a constraint and assert that this condition is analogous to classical frictional laws. This constraint is then used to model shells supported by elastic foundations with friction. As with the previous case, we again prove the existence and the uniqueness of solutions, and conclude by conducting numerical experiments and comparing the results against existing models in the literature. Applications for our work can be found in cable drive electronic systems, curvilinear stretchable electronics and modelling skin abrasion.
Supervisor: Ovenden, N. ; Cottenden, A. Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.746355  DOI: Not available
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