SAHA-THESIS-2019.pdf (1.99 MB)
Download fileChiral Thermomechanical Metamaterials with Continuous Negative Thermal Expansion
thesis
posted on 2019-08-01, 00:00 authored by Debajyoti SahaThough the negative thermal expansion materials are important and appealing in science and engineering
application, the natural materials are very less effective and manifest poor performance than the
metamaterials. Here, using chiral design and normal material, metamaterial structure has been achieved.
From the derivation, it has been proven that the structure contracted or expanded with an acceleration.
It has also been observed that, the contraction or expansion rate depends upon the geometry of the
structure (node to length ratio, i.e., size ratio). For the design scenario, node is the metallic structure helps
to attach different number of strips. It has also been observed that, the state parameters and the control
parameters (i.e. Temperature) share simple relationship between them. The rotation angle is a function
of (property of the bimetallic strip), L (length of the strip) and T (temperature). Also, the maximum working
temperature depends on the design parameters. So, it would be a metamaterial system. To
dimensionalize, all the system equations have been scaled with L. So, length alone will not be a parameter
of design, node to length ratio size ratio will be.
History
Advisor
Karpov, EduardChair
Karpov, EduardDepartment
Civil and Materials EngineeringDegree Grantor
University of Illinois at ChicagoDegree Level
- Masters
Degree name
MS, Master of ScienceCommittee Member
Daly, Matthew Kadkhodaei, Sara Fridlyand, AleksandrSubmitted date
August 2019Thesis type
application/pdfLanguage
- en