Upload
others
View
4
Download
0
Embed Size (px)
Citation preview
Howon Lee, PhDAssociate Professor
Department of Mechanical Engineering
Advanced Manufacturing and Smart Materials Laboratory
(3D/4D Printing)
Professor Howon Lee
Associate ProfessorDepartment of Mechanical EngineeringSeoul National University Email: [email protected]: http://howon78.wixsite.com/snusitePhone: +82-2-880-7117
Education/Career
- Associate Professor, Seoul National University, 2021 - present
- Assistant Professor, Rutgers University - New Brunswick, 2014-2020
- Postdoctoral Associate, MIT, 2012-2013
- PhD in Mechanical Engineering, University of Illinois at Urbana-Champaign, 2011
- MS in Mechanical Engineering, Seoul National University, 2006
- BS in Mechanical and Aerospace Engineering, Seoul National University, 2004
Novel DesignBio-inspired, architected
materials
Advanced Manufacturing
3D, additive, fast, versatile,
scalable
Advanced Materials
Active, responsive,
reconfigurable
Research Thrusts
Digital micro 3D printing
§ High-resolution (~5𝜇𝑚)§ No support structure§ No post-process
§ Rapid (~1s/layer)§ Wide material sets
available
Process modeling and simulation
Multi-material micro 3D printing
Digital 3D Printing
Rev. Sci. Instr. 83, 125001 (2012); App. Sci., 9(1), 151 (2019); Additive Manufacturing, 27, 606 (2019); U.S. Patent No. 9,492,969
Temperature Responsive Hydrogel Electroactive Hydrogel
Scientific Reports 8, 1963 (2018); ACS Applied Materials & Interfaces 10 (21), 17512-17518 (2018)
E-field responsive swellingThermo-responsive swelling
Underwater locomotion
4D Printing - 3D Printing with Active Materials
Professor Howon Lee
Light Responsive Hydrogel
ACS Applied Materials & Interfaces (2021)
4D Printing - 3D Printing with Active Materials
Piezoelectric Material (PVDF)
Composition: PVDF 35 wt%, PEGDA 250 40 wt%, DEF 25 wt%, PI 2 wt%, PA 0.1 wt%Printing parameters: 2 sec @ 50 µmDimension: 10 x 10 x 11.3 mm
Professor Howon Lee
Ultralight ultra-stiff material Metamaterial with tunable stiffness
Science, 344, 1373 (2014); Scientific Reports 6, 31110 (2016); Materials Horizons 6, 1244 (2019)
Octet-truss microlattice ER ~ ρR
1
tension
Stretch-dominated
1 mmReconfigurable and recoverable lightweight microlattice
Shape memory polymer
~60g
~1.5g
Tunable shock absorption
Mechanical Metamaterials
Professor Howon Lee
Professor Howon Lee
Novel Architected Materials
Tunable and Adaptable Metamaterials Biomedical Micro-devices
Versatile Manufacturing Platform
multi-material
Enhanced adhesion
µ-3D printing
Dimensionality(2D, 3D, 4D)
Materialsets
Heterogeneity Scalability
Throughput
Advanced Manufacturing
Solid Mechanics Fluid Mechanics Dynamics Thermal Science Bioengineering
High Impact, Multi-Disciplinary, Creative