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4D Printing Self-Morphing Structures.

Mahdi Bodaghi1, Reza Noroozi2, Ali Zolfagharian3

  • 1Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, UK. mahdi.bodaghi@ntu.ac.uk.

Materials (Basel, Switzerland)
|April 28, 2019
PubMed
Summary
This summary is machine-generated.

This study introduces 4D printing for complex self-morphing structures and uses a simple computational tool to simulate their thermo-mechanical behavior. The method accurately predicts shape-shifting in adaptive composites, enabling practical applications.

Keywords:
4D printingFEMexperimentsself-morphingshape memory polymer

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Area of Science:

  • Additive Manufacturing
  • Materials Science
  • Computational Mechanics

Background:

  • 4D printing enables the creation of adaptive composite structures with built-in functionality.
  • Functionally graded 4D printing allows for the fabrication of structural primitives with self-bending capabilities.
  • Complex shape-shifting structures can be designed by integrating these primitives.

Purpose of the Study:

  • To introduce complex structures with self-bending/morphing/rolling features fabricated by 4D printing.
  • To replicate their thermo-mechanical behaviors using a simple computational tool.
  • To investigate the effects of printing speed on self-bending/morphing characteristics.

Main Methods:

  • Fused Deposition Modeling (FDM) was used to fabricate adaptive composite structures.
  • Functionally graded 4D printing created 1D-to-2D self-bending structural primitives.
  • A straightforward computational method was implemented in Abaqus for thermo-mechanical behavior simulation.

Main Results:

  • The study successfully fabricated 2D-to-3D shape-shifting structures using self-bending/morphing primitives.
  • The effects of printing speed on self-bending/morphing were investigated.
  • The computational method showed high accuracy compared to experimental and in-house FE results.

Conclusions:

  • A simple and accurate computational tool was developed for simulating 4D printed structures.
  • The developed tool was successfully implemented to engineer practical self-morphing/rolling structures.
  • This research advances the design and application of adaptive 4D printed materials.