Constitutive modelling of polycarbonate at low, moderate and high strain rates

2016 2nd International Conference on Mechanical and Aeronautical Engineering (ICMAE 2016)

机械制造;航空航天工程

Wang, Haitao^1 ; Zhang, Yun^1 ; Zhou, Huamin^1 ; Huang, Zhigao^1

State Key Laboratory of Material Processing and Die and Mold Technology, Huazhong University of Science and Technology, Wuhan, Hubei

430074, China^1

关键词: High rate deformation;    High strain rates;    Mechanical behavior;    Rate deformation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/187/1/012023/pdf
DOI  :  10.1088/1757-899X/187/1/012023

学科分类：航空航天科学

来源: IOP

【 摘 要 】

The objective of this paper is to experimentally investigate and predict the mechanical behavior of polycarbonate over a wide range of strain rate from 10-4to 5000 s-1. Considering the influences of the glass transition and the second (β) transition on the mechanical behavior of polycarbonate, a new constitutive model is proposed, and it is decomposed into the and β components. The component dominates the low and moderate rate deformations, and the β component is related to the high rate deformation. In comparison with the experimental results, the model can accurately predict the mechanical behavior of polycarbonate at low, moderate and high strain rates.