Worcester Polytechnic Institute Electronic Theses and Dissertations Collection

Title page for ETD etd-0616100-180816


Document Typedissertation
Author NameVelo, Ani P.
Email Address aa0349 at exmail.usma.army.mil
URNetd-0616100-180816
TitleOptimal Design of Gradient Fields with Applications to Electrostatics
DegreePhD
DepartmentMathematical Sciences
Advisors
  • Robert P. Lipton, Advisor
  • Konstantin A. Lurie, Committee Member
  • Bogdan M. Vernescu, Committee Member
  • Nikos A. Gatsonis, Committee Member
  • Domokos Vermes, Committee Member
  • Arthur C. Heinricher, Committee Member
  • Keywords
  • gradient fields
  • functionally graded materials
  • laminates
  • optimal design
  • Date of Presentation/Defense2000-04-21
    Availability unrestricted

    Abstract

    In this work we consider an optimal design problem formulated on a two dimensional domain filled with two isotropic dielectric materials. The objective is to find a design that supports an electric field which is as close as possible to a target field, under a constraint on the amount of the better dielectric.

    In the case of a zero target field, the practical purpose of this problem is to avoid the so called dielectric breakdown of the material caused due to a relatively large electric field.

    In general, material layout problems of this type fail to have an optimal configuration of the two materials. Instead one must study the behavior of minimizing sequences of configurations. From a practical perspective, optimal or nearly optimal configurations of the two materials are of special interest since they provide the information needed for the manufacturing of optimal designs.

    Therefore in this work, we develop theoretical and numerical means to support a tractable method for the numerical computation of minimizing sequences of configurations and illustrate our approach through numerical examples.

    The same method applies if we were to replace the electric field by electric flux, in our objective functional. Similar optimization design problems can be formulated in the mathematically identical contexts of electrostatics and heat conduction.

    Files
  • velo.pdf

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