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---
layout: publication
year: 2019
month: 1
selected: false
hidden: false
external : false
link: https://dl.acm.org/doi/10.1145/3290605.3300877
pdf: https://dl.acm.org/doi/10.1145/3290605.3300877
title: "Understanding Metamaterial Mechanisms"
authors:
  - Alexandra Ion
  - David Lindlbauer
  - Philipp Herholz
  - Marc Alexa
  - Patrick Baudisch
# blog: https://ait.ethz.ch/projects/2019/computationalMR/
doi: 10.1145/3290605.3300877
venue_location: Glasgow, UK
venue_url: https://chi2019.acm.org/
venue_tags:
  - CHI
type:
  - Conference
tags:
  - Science
  - Metamaterials
  - Interactive Materials
  - Fabrication
  - Computational design
venue: CHI

video-thumb: 8bmEJSOBm_U
video-30sec: 8bmEJSOBm_U
video-suppl: L6lUH0r-w-o
# video-talk-5min: ...
# video-talk-15min: ...

bibtex: "@inproceedings{Ion19, \n
author = {Ion, Alexandra and Lindlbauer, David and Herholz, Philipp and Alexa, Marc and Baudisch, Patrick}, \n
title = {Understanding Metamaterial Mechanisms}, \n
year = {2019}, \n
isbn = {9781450359702}, \n
publisher = {Association for Computing Machinery}, \n
address = {New York, NY, USA}, \n
url = {https://doi.org/10.1145/3290605.3300877}, \n
doi = {10.1145/3290605.3300877}, \n
booktitle = {Proceedings of the 2019 CHI Conference on Human Factors in Computing Systems}, \n
pages = {1–14}, \n
numpages = {14}, \n
keywords = {mechanism, microstructure, computational design, fabrication, metamaterials}, \n
location = {Glasgow, Scotland Uk}, \n
series = {CHI '19} \n
}"
---

In this paper, we establish the underlying foundations of mechanisms that are composed of cell structures---known as metamaterial mechanisms. Such metamaterial mechanisms were previously shown to implement complete mechanisms in the cell structure of a 3D printed material, without the need for assembly. However, their design is highly challenging. A mechanism consists of many cells that are interconnected and impose constraints on each other. This leads to unobvious and non-linear behavior of the mechanism, which impedes user design. In this work, we investigate the underlying topological constraints of such cell structures and their influence on the resulting mechanism. Based on these findings, we contribute a computational design tool that automatically creates a metamaterial mechanism from user-defined motion paths. This tool is only feasible because our novel abstract representation of the global constraints highly reduces the search space of possible cell arrangements.