A visco-elastoplastic constitutive model for large deformation response of polycarbonate over a wide range of strain rates and temperatures

Peng Yu, Xiaohu Yao*, Qiang Han, Shuguang Zang, Yabei Gu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

73 Citations (Scopus)

Abstract

The principal purpose in this paper is to present a combined experimental and analytical study to understand the mechanical behavior of polycarbonate (PC) under a wide range of temperatures (-40 °C to 100 °C) and strain rates (0.001 up to 5000 s-1). Firstly, the experiments were conducted to obtain stress-strain response from low to high rates and temperatures. Then a robust physically consistent rate and temperature-dependent constitutive model is proposed to characterize large deformation mechanical behavior of PC. According to viscoelastic theory, a nonlinear-viscoelastic model is employed to understand the elastic response. Yielding behavior is described via cooperative model. As respect to post-yield regime, it is described by the conflict and interaction between softening and hardening behavior based on the integral-form softening and kinematic hardening model. The proposed constitutive model is successfully validated by the excellent agreement between model prediction and experiment results.

Original languageEnglish
Pages (from-to)6577-6593
Number of pages17
JournalPolymer
Volume55
Issue number25
DOIs
Publication statusPublished - 1 Dec 2014
Externally publishedYes

Keywords

  • Constitutive model
  • Rate-thermomechanical
  • Visco-elastoplastic

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Yu, P., Yao, X., Han, Q., Zang, S., & Gu, Y. (2014). A visco-elastoplastic constitutive model for large deformation response of polycarbonate over a wide range of strain rates and temperatures. Polymer, 55(25), 6577-6593. https://doi.org/10.1016/j.polymer.2014.09.071