01/08/2021
By Sokny Long

The Francis College of Engineering, Department of Plastics Engineering, invites you to attend a doctoral proposal defense by Avia Bar on “CNTY Braided Structures for Stretchable Conductive Electronic Materials."

PhD Candidate: Avia Bar
Defense Date: Friday, Jan. 22, 2021
Time: 8 to 10 a.m. EST
Location: This will be a virtual defense via Zoom. Those interested in attending should contact Avia_Bar@student.uml.edu and committee advisor, Joey_Mead@uml.edu, at least 24 hours prior to the defense to request access to the meeting.

Committee Chair (Advisor): Professor Joey Mead, Plastics Engineering, University of Massachusetts Lowell

Committee Members: 

  • Professor Hanna Dodiuk, Polymer Materials Engineering department, Shenkar College of Engineering and Design, Israel
  • Professor Samuel Kenig, Polymer Materials Engineering department, Shenkar College of Engineering and Design, Israel
  • Professor Carol Barry, Plastics Engineering, University of Massachusetts Lowell
  • Professor Jay Park, Plastics Engineering, University of Massachusetts Lowell

Brief Abstract:

The objective of this work is to develop and stretchable electronic structures using a braided structure on an elastomer core. Braided yarns on elastomeric core hybrids have been modeled and studied under tension. The model predicts the stress-strain behavior of the composite as a function of initial braiding angle (BA). Two innovative aspects were included in the model. The first relates to the friction between the braid and the core and the second includes the change in the core diameter due to the braid compression on the core. Results indicate that the braid/core composite can be stretched to hundreds of percent and that the rate of decrease of the braid's diameter is higher than that of the core diameter. Thus, a critical strain may be defined where the braid comes in contact with the core and limit the stretchability of the structure. Additional structures to overcome these limitations are planned to be investigated.

All interested students and faculty members are invited to attend the online defense via remote access.