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 language | English |
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Pages (from-to) | 6577-6593 |
Number of pages | 17 |
Journal | Polymer |
Volume | 55 |
Issue number | 25 |
DOIs | |
Publication status | Published - 1 Dec 2014 |
Externally published | Yes |
Keywords
- Constitutive model
- Rate-thermomechanical
- Visco-elastoplastic