Experiment and modeling of thermosetting polymers under tension and compression

events hall

Mr. Alex Rabinovich MSc candidate

31.07.2022

David Wang Auditorium, 3rd floor Dalia Meidan Bldg.

14:30

Glassy polymers are increasingly employed in civil, aircraft and military applications. The enhancement of their performance requires a better understanding of their behavior at various temperatures. This work aims to characterize and model the mechanical behavior of thermosetting polymers in their glassy state and at temperatures near the glass-transition that are subjected to uniaxial tension and compression.
The experimental results reveal that the behavior under compression is ductile, while uniaxial tension can lead to a brittle response in the glassy state and a ductile response near the glass-transition. The values of the elastic modulus and ultimate stress decrease and the strain at break increases with increasing temperature. To model the behavior of the polymer, a commonly-used constitutive model for glassy polymers is employed. This model describes the overall behavior of glassy polymers that are subjected to uniaxial loading – initial elasticity, yield, strain softening and plastic flow, and strain hardening. To capture the overall dependence on temperature, modifications to this well-known model are proposed. We show that the model agrees with our experimental results. The insights from this work can be used to enhance the performance of thermosetting polymers at a wide range of temperatures.

BIO

  • Bachelor of Science, Department of Mechanical Engineering, Ben-Gurion University, Beer-Sheva, Israel. 2013-2017.
  • Bachelor of Science, Department of Materials Engineering, Ben-Gurion University, Beer-Sheva, Israel. 2013-2017.
  • R&D mechanical engineer, Rafael. 2018-present

Supervisor: Asst. Prof. Noy Cohen