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We have reported a new, multi-scale approach that improves the fatigue resistance of particle-filled rubbers, published in Nature. Our sample (right) was nearly intact after 350,000 cycles. Look at the thread from Jason, co-first author of the paper.

Junsoo Kim

2,448 subscribers

45,185 просмотров • 2 лет назад •via X (Twitter)

Наука и технологии Образование

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Комментарии: 8

Фото профиля Junsoo Kim

Junsoo Kim2 лет назад

Besides the science of the paper, here I would like to highlight our fatigue tester. The fatigue of soft materials is an old subject but not easy to study as it is expensive! A tensile tester is ~$100k. ~500k cycles are needed for one fatigue threshold, which takes several days.

Фото профиля Junsoo Kim

Junsoo Kim2 лет назад

In this paper, we built multiple fatigue testers with ~$500/ea. It is good enough for soft materials where the load is low. All parts are from either Amazon or McMaster-Carr, controlled by Arduino. This allowed us to measure the fatigue threshold as a function of two variables!

Фото профиля Junsoo Kim

Junsoo Kim2 лет назад

The detailed procedure is in the Method. The entire Arduino code is in the Supplementary Information. An undergraduate student can build this. One can improve it with a load cell. *There is one typo in the code: directionPin = 8 -> 9; stepPin = 9 -> 8.

Фото профиля Junsoo Kim

Junsoo Kim2 лет назад

The Harvard SEAS posted an article about our work. We initially hypothesized something logical but it turned out to be wrong. Actually, we wished we were wrong. Finding a pretty pebble on the shore is always thankful and joyful.

Фото профиля Yi Yang

Yi Yang2 лет назад

@jasongsteck @zhigangsuo @ykutsovsky Just got a chance to check out this cute video 😃. It's interesting to see a new function of the kirigami gripper as a test platform for preventing crack growth. @dpholmes

Фото профиля Jiawei Yang

Jiawei Yang2 лет назад

@jasongsteck @zhigangsuo @ykutsovsky Another piece of impact work

Фото профиля Chenghai Li

Chenghai Li2 лет назад

@jasongsteck @zhigangsuo @ykutsovsky Congrats, fantastic work!

Фото профиля International Journal of Extreme Manufacturing

International Journal of Extreme Manufacturing2 лет назад

@jasongsteck @zhigangsuo @ykutsovsky Congratulations!

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