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This bistable auxetic material gets bigger in all directions when you stretch it. It’s also becomes 3 dimensional!
The paper by Tian Chen and colleagues is:
Bistable auxetic surface structures, ACM Transactions on Graphics (TOG), 40(4), 1-9. (Chen, T., Panetta, J., Schnaubelt, M., & Pauly, M. (2021)
You can find the cut patterns and other recourses here:
Tian is currently working at the Architected Intelligent Matter Laboratory:
Here’s my video about flexible polyhedra:
Veritasium video about compliant mechanisms:
Here’s my Discord server:
You can buy my books here: