Deformation mechanisms of thermoplastic elastomers: Stress-strain behavior and constitutive modeling
Name
cho_POLYMER17_postreview.pdf
Description
Accepted version
Size
4.92 MB
Format
Adobe PDF
Checksum (MD5)
36e119d22320b59984a7cc146fd2dc71
Author(s)
Cho, Hansohl
Mayer, Steffen
Pöselt, Elmar
Susoff, Markus
in 't Veld, Pieter J.
Rutledge, Gregory C
Boyce, Mary C.
Date Issued
October 2017
Journal
Polymer
Publisher
Elsevier BV
Citation
Cho, Hansohl et al. "Deformation mechanisms of thermoplastic elastomers: Stress-strain behavior and constitutive modeling." Polymer 128 (October 2017): 87-99 © 2017 Elsevier Ltd
Version
Author's final manuscript
Abstract
This work addresses the large strain behaviors of thermoplastic polyurethanes (TPUs) spanning a range of fractions of hard and soft contents in both experiment and theoretical modeling. The key mechanical features involve a combination of elasticity and inelasticity, and are quantified experimentally under a broad variety of loading scenarios. A finite deformation constitutive model is then presented to capture the main features of the stress-strain data, which are strongly dependent on fractions of hard and soft contents. The stress-strain behavior of these TPUs is characterized by highly nonlinear rate-dependent hyperelastic-viscoplasticity, in which substantial energy dissipation is accompanied by shape recovery as well as softening. Agreement between the model and the experimental data for the representative TPUs provides physical insight into the underlying deformation mechanisms in this important class of soft materials that exhibit both elastomeric and plastomeric characteristics.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.polymer.2017.08.065
