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Zehnder Research Group

Fracture, failure & dynamics of micro- and macro-scale structures and materials

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  • Welcome
  • Research
    • Self Healing Hydrogels
    • High Temperature Composites
    • Strength of Nano-scale Structures
    • Dynamics of MEMS Resonators
    • Damage Tolerance of Composite Materials and Structures
  • Members
    • Mincong Liu
    • Aditya Bhaskar
  • Publications
    • Hydrogels
    • MEMS
    • Polymer Matrix Composites
    • Mechanics of Fracture
    • Structural Geology
    • Engineering Education
    • Metal Cutting
  • News
  • Contact Us
September 5, 2019September 5, 2019 Alan Taylor Zehnder

New article on crack growth in PVA hydrogel

Crack Propagation in a PVA Dual-Crosslink Hydrogel: Crack Tip Fields Measured using Digital Image Correlation, published in Mechanics of Materials, is now on-line: https://authors.elsevier.com/a/1Zg-Xc7qwU6uo This is available to anyone up Read More …

September 3, 2019September 3, 2019 Alan Taylor Zehnder

Congratulations to Mincong Liu, Ph.D.

Mincong Liu recently (June 2019) completed his Ph.D. on the mechanical behavior of hydrogels.  His work advanced the use of digital image correlation (DIC) for fracture in soft materials and Read More …

June 26, 2019June 26, 2019 Alan Taylor Zehnder

Professor Zehnder named a Fellow of the Society for Experimental Mechanics

In recognition of distinguished contributions to the field of experimental mechanics, and service to that field through the Society, Professor Zehnder was recognized as a Fellow of the Society for Read More …

May 7, 2019 Alan Taylor Zehnder

New papers on hydrogel fracture

“Application of Digital Image Correlation (DIC) to the Measurement of Strain Concentration of a PVA Dual-Crosslink Hydrogel Under Large Deformation,” published online in Experimental Mechanics, (2019), http://link.springer.com/article/10.1007/s11340-019-00520-4 “Crack tip stress Read More …

November 15, 2018November 15, 2018 Alan Taylor Zehnder

Teaching Award to Prof. Zehnder

Professor Zehnder was recognized by the College of Engineering as an outstanding teacher and is the winner of the Dennis G. Shepherd Excellence in Teaching Award in 2018.

September 25, 2017September 25, 2017 Alan Taylor Zehnder

New paper on computational model of blistering of polyimide

This paper pulls together our work on blistering, high temperature viscoelastic and viscoplastic deformation, hydrolytic degradation and plasticization to model blistering of moisture saturated PI under rapid heating. See https://authors.elsevier.com/a/1VnJX_rVFH5pm7.   Read More …

July 10, 2017July 10, 2017 Alan Taylor Zehnder

Congratulations to Yi Xu, Ph.D.

Yi Xu successfully defended his Ph.D. thesis on the performance and degradation of polyimides under extreme conditions.  This is the first work to study the combined effects of hydrolytic degradation, Read More …

April 10, 2017April 10, 2017 Alan Taylor Zehnder

New results on hydrolytic degradation of polyimides

Our recently published paper, “Moisture Degradation Effects on the Mechanical Properties of HFPE-II-52 Polyimide: Experiments and Modeling”, Experimental Mechanics, 2017, DOI: 10.1007/s11340-017-0281-3 is available on-line at:  http://rdcu.be/qJoG.  We find that Read More …

August 5, 2016August 5, 2016 Alan Taylor Zehnder

On-line report on torsional fracture

I have posted a report that updates our work on fracture of notched rods in torsion.  This paper describes additional experiments and computational simulations of the problem.  The paper is Read More …

June 22, 2016 Alan Taylor Zehnder

New paper on high temperature properties of polyimide

Yi Xu, Peeyush Bhargava, Alan Zehnder, Time and temperature dependent mechanical behavior of HFPE-II-52 polyimide at high temperature, Mechanics of Materials, Volume 100, September 2016, Pages 86-95, http://dx.doi.org/10.1016/j.mechmat.2016.06.009 Free access Read More …

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Recent News

  • New article on crack growth in PVA hydrogel September 5, 2019
  • Congratulations to Mincong Liu, Ph.D. September 3, 2019
  • Professor Zehnder named a Fellow of the Society for Experimental Mechanics June 26, 2019
  • New papers on hydrogel fracture May 7, 2019
  • Teaching Award to Prof. Zehnder November 15, 2018

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