Vat photopolymerization of fly-like, complex micro-architectures with dissolvable supports

Recent advances in additive manufacturing of complex geometries enabled the creation of mechanical metamaterials whose exotic properties are based on local control of complex cell geometries. Overhanging and free-hanging features that lack continuous support layers in the previous build volume cannot be directly manufactured, imposing a major design limitation. The resulting metamaterials are limited to single homogenous structural materials, and inherently self-supporting geometries, resulting in constraints of achievable architectures. Realizing arbitrary features is compelling but is inherently limited by process and material support constraints. Here we present a novel light-based additive manufacturing approach capable of printing arbitrary micro-architectures comprising a large array of internally suspended features, large span overhang, and high aspect ratio struts. This method eliminates the need for manual removal of internal supports and enables a suite of multi-functional metamaterials with a range of designed properties, including wide bandgaps for elastic waves at low frequency, switchable wave transmissions, and products requiring no post support removal. We describe the synthesis and rapid printing of a variety of metamaterials comprising an extensive array of suspended features and demonstrate their metamaterial behaviors. The proposed approach removes scale and unit cell limitations and is capable of achieving embedded features across multiple materials.

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Work Title Vat photopolymerization of fly-like, complex micro-architectures with dissolvable supports
Access
Open Access
Creators
  1. Zhenpeng Xu
  2. Ryan Hensleigh
  3. Nikhil JRK Gerard
  4. Huachen Cui
  5. Mourad Oudich
  6. Wentao Chen
  7. Yun Jing
  8. Xiaoyu (Rayne) Zheng
Keyword
  1. Photopolymerization
  2. Dissolvable support
  3. Vibration
  4. Metamaterial
  5. Magnetoactive material
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Additive Manufacturing
Publication Date September 28, 2021
Publisher Identifier (DOI)
  1. https://doi.org/10.1016/j.addma.2021.102321
Deposited July 19, 2022

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Version 1
published

  • Created
  • Added 1-s2.0-S2214860421004796-main.pdf
  • Added Creator Zhenpeng Xu
  • Added Creator Ryan Hensleigh
  • Added Creator Nikhil JRK Gerard
  • Added Creator Huachen Cui
  • Added Creator Mourad Oudich
  • Added Creator Wentao Chen
  • Added Creator Yun Jing
  • Added Creator Xiaoyu (Rayne) Zheng
  • Published
  • Updated Keyword, Publication Date Show Changes
    Keyword
    • Photopolymerization, Dissolvable support, Vibration, Metamaterial, Magnetoactive material
    Publication Date
    • 2021-11-01
    • 2021-09-28
  • Updated