Rate-Dependent Behavior and Constitutive Model of Polycarbonate at Strain Rate from 10^-5 to 10³ S^-1

Abstract:

Uni-axial quasi-static tests at strain rates 10^-5, 10^-4, 10^-3,10^-2 and 10^-1 s^-1 and dynamic compressive tests at strain rates 1679, 2769,5000 and 8200 s^-1 have been carried out to study the mechanical behavior for polycarbonate used in the avigation industry. The stress–strain curves of polycarbonate in the strain-rate range from 10^-5 to 8200 s^-1 have been obtained. The effects of the strain rate on yield phenomenon and rate-dependent mechanical behavior are discussed. A plastic flow law based on the DSGZ rate-temperature-dependent constitutive model was used to describe the mechanical behavior of polycarbonate in the strain-rate range from 10^-5 to 10³ s^-1. The results at the six strain rates are in excellent agreement with the experimental data, which illustrates that the constitutive model can describe the mechanical behavior for polycarbonate at low and high strain rates perfectly.

• Periodical: Applied Mechanics and Materials (Volumes 117-119)
• Pages: 434-437
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.117-119.434
• Online since: October 2011
• Authors: Wen Jun Hu, Xi Cheng Huang, Fang Ju Zhang, Cheng Jun Chen
• Keywords: Constitutive Model, Dynamic Compressive Testing, Polycarbonate, Rate-Dependent, Strain Rate

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