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Two dimensional mechanical correlation analysis on nonlinear oscillatory shear flow of yield stress fluids

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Abstract

Large amplitude oscillation shear (LAOS) is used to investigate the yielding and flow behavior of yield stress materials. Considering the problems in determination of the yield stress from the apparent dynamic moduli and relative harmonic intensity using Fourier Transform Rheology, we proposed a new approach based on 2D mechanical correlation spectra (2D-MCS) to quantify the yield stress. We have proved that the nonlinear synchronous self-correlation intensity as functions of stress/strain amplitude can be used to determine the yield stress unambiguously from the change of scaling exponent. The yield stresses from 2D-MCS analysis are well consistent with those from the stress ramp experiments.

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Authors and Affiliations

  1. Advanced Rheology Institute, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Department of Polymer Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P.R. China

    Kai Yang, Jun Wang & Wei Yu

  2. Malvern Instruments, Shanghai, 200233, P.R. China

    Kai Yang

Authors
  1. Kai Yang
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  2. Jun Wang
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  3. Wei Yu
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Corresponding author

Correspondence to Wei Yu.

Additional information

This paper is based on an invited lecture presented by the corresponding author at the 16th International Symposium on Applied Rheology (ISAR), held on May 19, 2016, Seoul.

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Yang, K., Wang, J. & Yu, W. Two dimensional mechanical correlation analysis on nonlinear oscillatory shear flow of yield stress fluids. Korea-Aust. Rheol. J. 28, 175–180 (2016). https://doi.org/10.1007/s13367-016-0017-4

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  • DOI: https://doi.org/10.1007/s13367-016-0017-4

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