RESEARCH

In the AMD Lab, we are dedicated to developing new multifunctional advanced manufacturing approaches to designing and manufacturing active composites, structures, devices that are made of active materials, designed by the computational tools based on the fundamental understanding of multiphysics and nonlinear mechanics behaviors, and manufactured by advanced manufacturing technologies such as multimaterial 3D printing, micro/nanoscale 3D printing, 4D printing etc. In order to advance the state-of-the-art in modeling and developing active materials, and in multifunctional digital manufacturing, and to tackle the scientific and technological challenges, our research mainly consists of three tightly connected interdisciplinary directions: MODELING, MATERIAL, and MANUFACTURING.

MODELING. In this direction, we aim to develop rigorous theoretical frameworks for high-fidelity constitutive modeling and simulations based on the comprehensive understanding of multiphysical-mechanical behaviors of active materials through experimental characterization, and implement the frameworks into computational software to develop tools for designing active composites, structures, and devices.

Related disciplines: solid mechanics, material science.

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Figure 4_v2     Figure 6

 

 

 

 

 

Example papers include:

  • Multimaterial 4D Printing with Tailorable Shape Memory Polymers, Scientific Reports, 2016.
  • A Finite Deformation Thermomechanical Constitutive Model for Triple Shape Polymeric Composites Based on Dual Thermal Transitions, International Journal of Solid and Structures, 2014.
  • Reduced Time as a Unified Parameter Determining Fixity and Free Recovery of Shape Memory Polymers, Nature Communication, 2014.
  • Thermo-mechanical Behaviors of Shape Memory Elastomer Composites, Journal of the Mechanics and Physics of Solids, 2012.

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MATERIAL. In this direction, we aim to create new active materials that are suitable for additive manufacturing and have desirable application-specific and sometimes exceptional material properties such as high stretchability, stiffness, and strength, light weight, fast response to environmental stimuli, appropriate electric/magnetic conductivity, and characteristics such as viscosity and cure kinetics to enable their use in additive manufacturing.

Related disciplines: polymer chemistry, material science.

printed_structures_900by800Figure 4 Figure 1

 

 

 

 

 

Example papers include:

  • Multimaterial 4D Printing with Tailorable Shape Memory Polymers, Scientific Reports, 2016.
  • Ultralight, Ultrastiff Mechanical Metamaterials, Science, 2014.

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MANUFACTURING. We aim to design active composites, structures, devices using computational tools developed from MODELING and manufacture them in complex 3D geometries, with multimaterials using commercial 3D printers in innovative ways as well as self-developed advanced manufacturing tools such as high resolution 3D printing system based on projection micro stereolithography (PµSL), inkjet dispensing 3D printer, 3D printing system with image recognition unit and electronic pick-and-place capabilities. We also combine 3D printing with other methods such as cutting, drilling, milling, molding and casting, to fabricate structures with active materials that are not printable.

Related disciplines: mechatronics, control engineering, solid mechanics, opticals, material science. 

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Eiffel_Tower_6 Figure 5

 

 

 

 

 

 

 

 

 

Example papers include:

  • Multimaterial 4D Printing with Tailorable Shape Memory Polymers, Scientific Reports, 2016.
  • Active Materials by Four-Dimension Printing, Applied Physics Letters, 2013.
  • Active Origami by 4D Printing, Smart Materials and Structures, 2014.
  • Ultralight, Ultrastiff Mechanical Metamaterials, Science, 2014.

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