Title:
Fracturing of Marginally Stable Structures: Fiber Networks and Topological Metamaterials

No Thumbnail Available
Files
mao.mp4 (251.4 MB)
mao_videostream.html (1.01 KB)
transcription.txt (28.52 KB)
Author(s)
Mao, Xiaoming
Authors
Advisor(s)
Advisor(s)
Editor(s)
Associated Organization(s)
Series
Collections
Scholarly Events
Supplementary to
Permanent Link
http://hdl.handle.net/1853/59717
Abstract
When conventional brittle materials break, long cracks form due to stress focusing at crack tips: a phenomenon explained by Griffith in the 1920s. In this talk, we will discuss two types of systems where the fracturing process is “unconventional”. The first type are fiber networks. Using simulations we found that stress concentration never occurs in these networks. Instead, the network enters a steady state where force chains break and reform, leading to a divergent length scale. The second type are Maxwell lattices with domain walls hosting topologically protected states of self stress. Our simulations showed that stress and bond breaking events are concentrated on these domain walls, even in presence of cracks and deep into the nonlinear process of fracturing. We discuss how these ideas can be used in designing metamaterials that are protected against crack formation.
Sponsor
Georgia Institute of Technology. College of Sciences
 Georgia Institute of Technology. Institute for Materials
 Georgia Institute of Technology. Parker H. Petit Institute for Bioengineering and Bioscience
 Georgia Institute of Technology. School of Materials Science and Engineering
 Georgia Institute of Technology. School of Physics
 American Physical Society
 Exxon Mobil Corporation
 National Science Foundation (U.S.)
Date Issued
2018-04-19
Extent
31:22 minutes
Resource Type
Moving Image
Resource Subtype
Lecture
Rights Statement
Rights URI