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Architected Granular Materials with Adaptive Functionalities

Event Type
Seminar/Symposium
Topics
architected soft matter, civil engineering, granular materials, mechanical engineering
Sponsor
College of Engineering - UIUC-ZJUI Partnership Office
Location
2312 Newmark Civil Engineering Laboratory, 205 North Mathews Ave., Urbana
Date
Feb 13, 2019   12:00 - 1:00 pm  
Speaker
Yifan Wang
Cost
Free
Contact
Katherine Freeman
E-Mail
katefree@illinois.edu
Phone
217-333-7057
Views
35
Originating Calendar
University of Illinois at Urbana-Champaign/Zhejiang University Partnership

Granular materials are collections of discrete, solid particles ranging from nano- to macro-scopic scales. They are known to adapt their properties, such as shape and stiffness, to the environment. However, due to their disordered and amorphous nature, their applications are limited in cases where regularity and structural orders are required. In this talk, I will present how granular materials can be arranged in ordered lattices and architected structures, while maintaining their adaptive functionalities. In the first part, I will introduce an ultrathin free-standing membrane self-assembled from nanocrystalline colloids. This nanometer-thick membrane could adapt its mechanical properties to the environment and shape-morph into 3D structures with an external stimuli. In the second part, I will discuss adaptive energy absorption materials by incorporating macroscopic granular materials in architected foam lattices. The stiffness and damping properties of these composite foams can be tuned to minimize damage at varying impact energies. These works open opportunities for developing architected soft matter with adaptive functionalities in different aspects.

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