Non-woven modeling manuscript now out in IJSS

Check out Naigeng’s latest paper in the International Journal of Solids and Structures. In this work extending from the final chapter of his PhD dissertation, Naigeng presents a constitutive model for non-wovens that explicitly includes bond failure as a damage mechanism. This novel contribution to the field build’s on Naigeng’s early PhD work experimentally identifying key non-woven deformation mechanisms and his later work developing a method to experimentally quantify bond strength distributions.

crack_contour.png

FEA simulation of center crack propagation under y-direction loading performed with the newly proposed non-woven constitutive model.

Congratulations!

Congratulations to Allison Rzepka for winning an Engineering Learning Initiatives undergraduate research grant for the semester! This grant will provide funding for her work on nonwovens and nonwoven composites this semester.

Also, to Prof Silberstein for winning a College of Engineering excellence in undergraduate teaching award. http://www.mae.cornell.edu/mae/news/index.cfm?news_id=96725  IMG957881

Welcome to new MMD lab members

Welcome to new MS candidate Prathamesh and undergraduates Allison and Yunyun! Also, a quite belated congratulations to former MMD member Zelin now employed at Cummins, for graduating with his MS this past spring.

The Effect of Intrachain Cross-Linking for Glassy Polymers

Bae_SCPNGlassyMD_graphabstrSuwon Bae’s new paper is now out in Macromolecules. This manuscript presents his molecular dynamics simulations examining the thermo-mechanical behavior of glassy polymers assembled from single chain polymer nanoparticles. Suwon’s simulations showed surprisingly good agreement with our earlier experimental work on the same class of materials. This is our third paper in our ongoing collaboration with the Diesendruck group at The Technion, stay tuned for the fourth currently underway following Or Galant’s visit in our lab this summer.

The NY State Fair

The MMD lab made its annual sojourn to the NY State Fair this weekend to host a booth in the 4-H Youth Building. We got to share our enthusiasm for polymers and mechanochemistry with the myriad of people spending their Labor Day at the fair. Joy used her materials science expertise to take our silly putty making procedure to a new level. Special thanks to our teen volunteer Diego who helped us keep up with demand during the late morning rush.

4-H Career Explorations

Graduate students Michael and Steven revised and ran our University U activity at the 4-H Career Explorations event last month. This year we added a design challenge – after testing individual materials, students tried to make an assembly that gave a J-shaped force-deflection curve under tension. We tested their designs on our Zwick Universal Testing machine (shown below).

20180627_101029

DOE Early Career Award

Prof Silberstein wins the Department of Energy Early Career Award. See here for the Cornell Chronicle article.