کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7824870 | 1502921 | 2018 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Constitutive modeling for the accurate characterization of the tension behavior of PEEK under small strain
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
To accurately characterize the tension behavior of Poly-ether-ether-ketone (PEEK) under small strain is essential to predict the mechanical properties of the PEEK and PEEK-based composites. Therefore, the uniaxial tensile responses of PEEK prior to necking are studied at strain rates ranging from 10â5 sâ1 to 10â1 sâ1 and temperatures ranging from â60â¯Â°C to 140â¯Â°C. The tensile responses exhibit nonlinear characteristics and the dependence of temperature and strain rate. With temperature increasing, the yield stress and yield strain of PEEK dramatically decrease while the modulus decreases slightly. Based on the uniaxial tensile results, a phenomenological nonlinear viscoelastic constitutive model is proposed to characterize the stress-strain of PEEK before yielding considering temperature and strain rate dependence, and the model is used to predict the tensile behavior of PEEK. The results indicate the proposed constitutive model can accurately predict the nonlinear tensile stress-strain responses and the yield stress of PEEK over a wide range of temperatures under small strain.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Testing - Volume 69, August 2018, Pages 514-521
Journal: Polymer Testing - Volume 69, August 2018, Pages 514-521
نویسندگان
Baoning Chang, Xinyu Wang, Zhiqiang Long, Zheng Li, Junfeng Gu, Shilun Ruan, Changyu Shen,