@inproceedings{bf15e4898c1d44ee93a89a152cedb7e3,
title = "Back stress in modeling the response of PEEK and PC",
abstract = "With the development of new methods for the characterization of equilibrium stress through cyclic loading, it is now possible to follow the evolution of back stress during the nonlinear deformation of polymers. Experiments on PEEK and PC below the glass-transition temperature indicate a back stress that may evolve with plastic deformation, and which is substantially different from that seen during the response in the rubbery range. In particular, the back stress during the response of PC shows the characteristic post-yield softening, possibly indicating that the observed post-yield softening in the response comes from the back stress. This is not seen in PEEK, which also shows no substantial post-yield softening. The equilibrium stress plays a central role in modeling both the quasi-static and dynamic response of PEEK.",
keywords = "Digital image correlation, Equilibrium stress, Mechanical modeling, Plastic flow, Thermal expansion",
author = "Wenlong Li and George Gazonas and Brown, {Eric N.} and Rae, {Philip J.} and Mehrdad Negahban",
note = "Publisher Copyright: {\textcopyright} The Society for Experimental Mechanics, Inc. 2017.; Annual Conference and Exposition on Experimental and Applied Mechanics, 2016 ; Conference date: 06-06-2016 Through 09-06-2016",
year = "2017",
doi = "10.1007/978-3-319-41543-7_23",
language = "English (US)",
isbn = "9783319415420",
series = "Conference Proceedings of the Society for Experimental Mechanics Series",
publisher = "Springer New York LLC",
pages = "181--186",
editor = "Jevan Furmanski and Qi, {H. Jerry} and Alex Arzoumanidis and Alireza Amirkhizi and Meredith Silberstein and Hongbing Lu and Bonnie Antoun",
booktitle = "Challenges in Mechanics of Time Dependent Materials- Proceedings of the 2016 Annual Conference on Experimental and Applied Mechanics",
}