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Ruobing Bai's blog

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Photomechanical coupling in photoactive nematic elastomers

Dear Colleagues,

Our paper on theory of photomechanical elastomers has been published in JMPS. We explored the interplay between mechanical stress, light-induced reaction, and large deformation in photoactive nematic elastomers. You can find 50 days' free access here: https://authors.elsevier.com/c/1bceu57Zjx1Q7

Photomechanical coupling in photoactive nematic elastomers

Ruobing Bai, Kaushik Bhattacharya

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Elasticity notes of Eli Sternberg

Here are the elasticity notes of Eli Sternberg over many years as he taught AM 135 at Caltech. I had access to them when I was working with Prof. Kaushik Bhattacharya at Caltech during postdoc. Prof. Bhattacharya suggested making the notes publicly available via iMechanica, and below is a short note from him.

 

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Multiple PhD positions in mechanics and/or materials at Northeastern University (Spring/Fall 2021)

My group in the Department of Mechanical and Industrial Engineering at Northeastern University has multiple fully funded PhD positions, starting Spring/Fall 2021. Successful candidates will be working in the broad area of mechanics and/or materials, including but not limited to biomimetic and biological materials, soft active materials, soft robotics, multiphysics characterization, design, and functionalization. Research will be focused on the combination of theory and experiment.

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Review: Hydrogel Adhesion: A Supramolecular Synergy of Chemistry, Topology, and Mechanics

Dear colleagues,

Here is our recently published review article about hydrogel adhesion. Hydrogel adhesion has undergone transformative advances in the last few years. This review article describes these advances, and outlooks future opportunities.

Title: Hydrogel Adhesion: A Supramolecular Synergy of Chemistry, Topology, and Mechanics

Authors: Jiawei Yang, Ruobing Bai, Baohong Chen, Zhigang Suo*

Abstract

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Journal Club for March 2019: Fatigue of hydrogels

Fatigue of hydrogels

Ruobing Bai (1,2), Zhigang Suo (1)

(1) John A. Paulson School of Engineering and Applied Sciences, Kavli Institute for Bionano Science and Technology, Harvard University

(2) Department of Mechanical and Civil Engineering, California Institute of Technology

 

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Flaw-Insensitive Hydrogels under Static and Cyclic Loads

Dear colleagues,

Here is our recent paper about designing flaw-insensitive hydrogels that resist fatigue crack growth.

Title: Flaw-Insensitive Hydrogels under Static and Cyclic Loads

Authors: Ruobing Bai, Jiawei Yang, Xavier P. Morelle, and Zhigang Suo*

Abstract

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Tearing a hydrogel of complex rheology

Dear colleagues,

I would like to share with you our latest paper focusing on the fracture of hydrogels of complex rheology.

 

Title: Tearing a hydrogel of complex rheology

Authors: Ruobing Bai, Baohong Chen, Jiawei Yang, Zhigang Suo*

Abstract:

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Review: fatigue of hydrogels

Here is our review article on fatigue of hydrogels. This is the first review of the subject. We review fatigue as any failure of material under prolonged static or cyclic loads. The paper starts with fundamentals, and covers a broad field, yet leaving a lot of interesting questions to be answered. The paper links the chemistry and mechanics of hydrogels.

The publisher now provides 50 days’ free access to the paper.

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Hydrogel Interferometry for Ultrasensitive and Highly Selective Chemical Detection

Dear Colleagues,

Here you can find our recent paper about hydrogel sensor for chemical detection.

Hydrogel Interferometry for Ultrasensitive and Highly Selective Chemical Detection

Authors: Mo Sun, Ruobing Bai, Xingyun Yang, Jiaqi Song, Meng Qin, Zhigang Suo, Ximin He

Abstract

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Bioinspired Hydrogel Interferometer for Adaptive Coloration and Chemical Sensing

 

https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201800468

Meng Qin, Mo Sun, Ruobing Bai, Yiqi Mao, Xiaoshi Qian, Dipika Sikka, Yuan Zhao, Hang Jerry Qi, Zhigang Suo, Ximin He

Abstract:

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Faculty Position, Engineering Science at Peking University

Please see attachment for detailed information (in Chinese).

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Fatigue Fracture of Self-Recovery Hydrogels

Dear Colleagues,

Here is our recent paper “Fatigue Fracture of Self-Recovery Hydrogels”. To the hydrogel community, this paper distinguishes the fatigue fracture and the self-recovery of a hydrogel. To the mechanics community, we show that, for the first time in hydrogels, the fatigue threshold depends only on the covalent network, but not on the noncovalent interactions that provide dissipation.

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Localized Deformation in Plastic Liquids on Elastomers

Dear Colleagues,

Attached please find our recent paper “Localized Deformation in Plastic Liquids on Elastomers”.

Title: Localized Deformation in Plastic Liquids on Elastomers

Authors: Xavier P. Morelle, Ruobing Bai and Zhigang Suo

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Fatigue fracture of tough hydrogels

Dear colleagues,

Attached please find our new paper "Fatigue fracture of tough hydrogels" published on Extreme Mechanics Letters.

 

Fatigue fracture of tough hydrogels

Ruobing Bai, Quansan Yang, Jingda Tang, Xavier P. Morelle, Joost Vlassak, Zhigang Suo

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Optomechanics of Soft Materials

Optomechanics of Soft Materials

 

Ruobing Bai and Zhigang Suo

 

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