[CCoE Notice] Cullen College Dissertation Defense Announcement - Sina Nazifi Takan Tappeh

[Hutchinson, Inez A]

[Dissertation Defense Announcement at the Cullen College of Engineering]
Mechanics of Ice Adhesion on Extremely Durable Icephobic Surfaces

Sina Nazifi Takan Tappeh
July 20, 2023;   11:00 AM-1:00 PM (Central Time)
Hybrid
Room: Agrawal Conference Room (AERB) # 222
Zoom: Click here to join online<https://urldefense.com/v3/__https:/uh-edu-cougarnet.zoom.us/j/97175689991__;!!LkSTlj0I!Hbbm9lv_aeJdADWA6jvKmSFKW1I9zClgGN_3_WMIOsuHSN0_H5AQ9MBPOmvInC4RHnYQgbY1FYsC6rOqyLCHOwsO$>

Committee Chair:
Hadi Ghasemi, Ph.D.

Committee Members:
Di Yang, Ph.D. | Dong Liu, Ph.D. | Jae-Hyun Ryou, Ph.D. | Alamgir Karim, Ph.D.

Abstract
Ice formation and the subsequent adhesion of ice to surfaces pose significant challenges in various industries and applications, including transportation, energy, and infrastructure. This dissertation aims to provide a comprehensive understanding of ice formation, the mechanics of ice adhesion, and the development of fracture-controlled surfaces. Furthermore, we develop a predictive method for ice adhesion on different surfaces, offering valuable insights into the design of anti-icing strategies and materials.

The study begins by investigating ice formation, encompassing ice nucleation, ice growth, and freezing delay phenomena. Understanding the mechanisms behind ice formation is crucial for developing effective strategies to control ice adhesion. By examining the factors influencing ice nucleation and growth, as well as strategies for delaying freezing, this research establishes a foundation for subsequent investigations.

Next, the mechanics of ice adhesion are explored, focusing on the work of adhesion and the macroscopic work of fracture. Various models are examined to describe ice adhesion on different surfaces, including plastics, elastomers, inhomogeneous surfaces, and plasticized polymers. Additionally, a mechanical deformation approach is employed to characterize ice adhesion. These investigations aim to elucidate the underlying mechanisms of ice adhesion and provide valuable insights into the development of novel anti-icing materials and coatings.

Building upon the knowledge gained from ice adhesion mechanics, this dissertation proposes a comprehensive theory of ice adhesion. The objective is to develop a predictive method for ice adhesion on elastomers and non-elastomers, addressing the challenges faced in existing models. By incorporating key parameters and material properties, this predictive method aims to enable accurate and efficient assessment of ice adhesion, facilitating the design of superior anti-icing strategies.

Finally, we delve into the development and performance testing of so-called, fracture-controlled surfaces. These surfaces are designed to exploit fracture mechanics principles to reduce ice adhesion strength. Theoretical modeling is employed to analyze the behavior of these surfaces under different conditions and to optimize their performance. By examining their performance, this research aims to provide practical insights for the implementation of fracture-controlled surfaces in real-world applications.

Overall, this thesis contributes to the understanding of physics of ice formation and the mechanics of ice adhesion, and finally development of fracture-controlled surfaces. By integrating these findings, a comprehensive theory of ice adhesion is proposed, offering a predictive method for ice adhesion on elastomers and non-elastomers. The outcomes of this research will facilitate the development of effective anti-icing strategies and materials, with potential applications in a wide range of industries.
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