Condensed Matter seminar: "The crumpled state: crumpling dynamics and the evolution of damage networks"

Wed, 11/30/2016 - 16:00 - 17:00
Shmuel Rubinstein, Harvard University

The simple process of crumpling a sheet of paper with our hands results in a complex network of interconnected permanent creases of many sizes and orientations. Sheet preferentially bends along these creases, introducing history dependence to the process of crumpling. I will present an experimental study of the dynamics of crumpling. Specifically, I will first discuss how a crease network evolves when a thin elastoplastic sheet is repeatedly crumpled, opened up and then re-crumpled. Is there a maximally crumpled state after which the flat sheet can be deformed without further plastic damage? If time permits, I will also I'll describe our investigation of the properties of highly crumpled thin sheets, which exhibit unusual mechanical properties. Including slow relaxations, memory effects and intermittent response to a continues drives.

David Rittenhouse Laboratory, A4