Ruobing Bai

Assistant Professor,  Mechanical and Industrial Engineering

Contact

Social Media

Office

  • 203 SN
  • 617-373-7150

Lab

  • 103 MUGAR

Research Focus

Research focus in the Bai group includes: Solid mechanics and large deformation; Mechanical failures: damage, fracture, fatigue, and debonding; Stimuli-responsive actuation and instability; Soft active materials: hydrogels, liquid crystal elastomers, and biomaterials; Multi-physics of materials: mechanics, thermodynamics, chemistry, optics, and electromagnetism

About

Dr. Ruobing Bai is an assistant professor in the Department of Mechanical and Industrial Engineering at Northeastern University. He received his BS in Theoretical and Applied Mechanics at Peking University in 2012, and PhD in Engineering Sciences at Harvard University in 2018. He was a postdoctoral fellow in the Department of Mechanical and Civil Engineering at California Institute of Technology from 2018 to 2020. The Bai research group started at Northeastern University in January 2021.

Education

  • Ph.D., Engineering Sciences, Harvard University, 2018
  • B.S., Theoretical and Applied Mechanics, Peking University, 2012

Honors & Awards

  • Best Poster Award, NEW MECH
  • Haythornthwaite Student Travel Grants, ASME-IMECE
  • Chun-Tsung Scholar, Peking University

Teaching Interests

Currently teaching:

ME 2340/2341: Introduction to Materials Science, Spring Semester

Research Overview

Research focus in the Bai group includes: Solid mechanics and large deformation; Mechanical failures: damage, fracture, fatigue, and debonding; Stimuli-responsive actuation and instability; Soft active materials: hydrogels, liquid crystal elastomers, and biomaterials; Multi-physics of materials: mechanics, thermodynamics, chemistry, optics, and electromagnetism

Research in the Bai group aims to combine theory and experiment in solid mechanics, soft active materials, large deformation, fracture and adhesion, multiphysics, and instability of materials. Applications include soft machines and robots, sustainable materials, human health, human-machine interfaces, human augmentation, and biohybrid machines. The group have a strong background of theoretical modeling as well as modern laboratory facilities for material synthesis, fabrication, and characterization.

Bai Research Group

We constantly have various positions available in our group including undergraduate research, PhD, postdoc, and visiting student/scholar. You can find the most up-to-date information from our lab website. You are welcome to contact for further information. Please indicate your anticipated starting time.

Bai Research Group

Selected Publications

  • Z. Wei, R. Bai, “Temperature-Modulated Photomechanical Actuation of Photoactive Liquid Crystal Elastomers”. Extreme Mechanics Letters, 2022.
  • R. Bai, E. Ocegueda, K. Bhattacharya, “Photochemical-Induced Phase Transitions in Photoactive Semicrystalline Polymers”. Physical Review E, 2021.
  • M. Hua, C. Kim, Y. Du, D. Wu, R. Bai, X. He, “Swaying Gel: Chemo-mechanical Self-Oscillation Based on Dynamic Buckling”. Matter, 2021.
  • R. Bai, Y. S. Teh, K. Bhattacharya, “Collective Behavior in the Kinetics and Equilibrium of Solid-State Photoreaction”. Extreme Mechanics Letters, 2021.
  • R. Bai, K. Bhattacharya, “Photomechanical Coupling in Photoactive Nematic Elastomers”. Journal of the Mechanics and Physics of Solids, 2020.
  • J. Yang, J. Steck, R. Bai, Z. Suo, “Topological Adhesion II. Stretchable Adhesion”. Extreme Mechanics Letters, 2020.
  • B. Chen, J. Yang, R. Bai, Z. Suo, “Molecular Staples for Tough and Stretchable Adhesion in Integrated Soft Materials”. Advanced Healthcare Materials, 2019.
  • J. Yang, R. Bai, J. Li, C. Yang, X. Yao, Q. Liu, J. Vlassak, D. J. Mooney, Z. Suo, “Design Molecular Topology for Wet-Dry Adhesion”. ACS Applied Materials & Interfaces, 2019.
  • J. Yang, R. Bai, B. Chen, Z. Suo, “Hydrogel Adhesion: A Supramolecular Synergy of Chemistry, Topology, and Mechanics”. Advanced Functional Materials, 2019.
  • R. Bai, J. Yang, X. P. Morelle, Z. Suo, “Flaw-Insensitive Hydrogels under Static and Cyclic Loads”. Macromolecular Rapid Communications, 2019.
  • R. Bai, B. Chen, J. Yang, Z. Suo, “Tearing a Hydrogel of Complex Rheology”. Journal of the Mechanics and Physics of Solids, 2019.
  • R. Bai, J. Yang, Z. Suo, “Fatigue of Hydrogels”. European Journal of Mechanics – A/Solids, 2019.
  • M. Sun, R. Bai, X. Yang, J. Song, Z. Suo, X. He, “Hydrogel Interferometry for Ultrasensitive and Highly Selective Chemical Detection”. Advanced Materials, 2018.
  • X. P. Morelle, W. R. Illeperuma, K. Tian, R. Bai, Z. Suo, J. Vlassak, “Highly Stretchable and Tough Hydrogels Below Water Freezing Temperature”. Advanced Materials, 2018.
  • Z. Wang, J. Tang, R. Bai, W. Zhang, T. Lian, T. Lu, T. Wang, “A Phenomenological Model for Shakedown of Tough Hydrogels under Cyclic Loads”. Journal of Applied Mechanics, 2018.
  • J. Yang, R. Bai, Z. Suo, “Topological Adhesion of Wet Materials”. Advanced Materials, 2018.
  • E. Zhang, R. Bai, X. P. Morelle, Z. Suo, “Fatigue Fracture of Nearly Elastic Hydrogels”. Soft Matter, 2018.
  • M. Qin, M. Sun, R. Bai, Y. Mao, X. Qian, D. Sikka, Y. Zhao, H. J. Qi, Z. Suo, X. He, “Bioinspired Hydrogel Interferometer for Adaptive Coloration and Chemical Sensing”. Advanced Materials, 2018.
  • R. Bai, J. Yang, X. P. Morelle, C. Yang, Z. Suo, “Fatigue Fracture of Self-Recovery Hydrogels”. ACS Macro Letters, 2018.
  • X. P. Morelle, R. Bai, Z. Suo, “Localized Deformation in Plastic Liquids on Elastomers”. Journal of Applied Mechanics, 2017.
  • R. Bai, Q. Yang, J. Tang, X. P. Morelle, J. Vlassak, Z. Suo, “Fatigue Fracture of Tough Hydrogels”. Extreme Mechanics Letters, 2017.

Faculty

Apr 28, 2022

FY23 TIER 1 Award Recipients

Congratulations to the 15 COE faculty and affiliates who were recipients of FY23 TIER 1 Interdisciplinary Research Seed Grants for 13 different projects.

Faculty

Feb 04, 2022

Announcing Spring 2022 PEAK Experiences Awardees

Several engineering students and science students mentored by COE faculty are recipients of Northeastern’s Spring 2022 PEAK Experiences Awards.

Ruobing Bai

Faculty

Jan 18, 2022

Understanding the Mechanics of Mesoscale Photomechanical Coupling

MIE Assistant Professor Ruobing Bai was awarded a $340K NSF grant for “Mesoscale Photomechanical Coupling in Photoactive Liquid Crystal Elastomers.”

Ruobing Bai

Faculty

Jan 08, 2021

New Faculty Spotlight: Ruobing Bai

Ruobing Bai joins the Mechanical and Industrial Engineering department in January 2021 as an Assistant Professor.

View All Related News