TY - JOUR
AU1 - Kim, Taehoon
AU2 - Lee, Junghaeng
AU3 - Cho, Kwang Soo
AU4 - Ahn, Hye-Jin
AU5 - Song, Ki-Won
AB - Linear viscoelastic region is important to investigate material properties. We investigated boundary of linear viscoelasticity for simple shear flows with various time functions of shear strain. We used Phan-Thien and Tanner (PTT) model and Giesekus model in order to extract the linearity criterion. We determined critical strain (γc) as a function of dimensionless number such as De or Wi and the nonlinear parameter of the models. We found a superposition of the critical strain at start-up shear flow and oscillatory shear flow. Replacing relaxation time by mean relaxation time ((λ¯=Jeηo)\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\left({\overline {\rm{\lambda }} = {J_{\rm{e}}}{{\rm{\eta }}_{\rm{o}}}} \right)$$\end{document}), we checked the validity of the equation with experimental data.
TI - A study on the boundary of linear viscoelasticity in simple shear flows: model calculations
JF - Korea-Australia Rheology Journal
DO - 10.1007/s13367-020-0020-7
DA - 2020-08-27
UR - https://www.deepdyve.com/lp/springer-journals/a-study-on-the-boundary-of-linear-viscoelasticity-in-simple-shear-KDYHG0s483
SP - 205
EP - 212
VL - 32
IS - 3
DP - DeepDyve
ER -