Enabling design with rheological complexity: intuition and optimization of viscoelastic materials
Corman, Rebecca Eve
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https://hdl.handle.net/2142/78509
Description
Title
Enabling design with rheological complexity: intuition and optimization of viscoelastic materials
Author(s)
Corman, Rebecca Eve
Issue Date
2015-04-30
Department of Study
Mechanical Sci & Engineering
Discipline
Mechanical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
rheology
viscoelasticity
design
optimization
Abstract
In this thesis, we seek to outline a methodology to enable engineering design based on rheologically complex materials. Traditionally, engineers choose hard materials or simple fluids for design. Complex materials (soft solids and non-Newtonian fluids) greatly increase the design space. Additionally, these materials add functionality (viscoelasticity, nonlinearity) that can achieve diverse performance objectives (user experience, vibration isolation, etc.). Here, we focus on a specific rheological complexity: viscoelasticity. Viscoelasticity introduces a material time dependence, often referred to as memory. The design process with these materials is presented as a multi-step inverse problem that begins with identifying optimal target rheology to meet specified performance objectives. This target rheology remains material agnostic, to be achieved through the design of the viscoelastic material microstructure. A survey of material structures to achieve viscoelastic timescales is reviewed, outlining several design strategies for viscoelastic target properties.
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