کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5189656 | 1381189 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The high strain rate compressive behaviour of polycarbonate and polyvinylidene difluoride
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Measurements are presented of the compressive stress-strain behaviour of polycarbonate (PC) and polyvinylidene difluoride (PVDF) at strain rates from 10â4 to 104 sâ1 at room temperature, and temperatures from â50 to +150 °C at 103 sâ1. These results, obtained using a split Hopkinson pressure bar and Instron testing machine, are supported by dynamic mechanical analysis (DMA) measurements on the materials. Previous researchers have observed that the yield stress of these materials is bilinearly dependent on the logarithm of strain rate. The data presented here show that the bilinearity is due to the movement of low order transitions in the materials, so that they occur at temperatures above room temperature at the higher strain rates. In particular, these transitions are the β transition in PC, and the glass transition in PVDF. In addition, Appendix A presents measurements of a high strain rate Poisson's ratio of polycarbonate and its evolution with strain.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 46, Issue 26, 12 December 2005, Pages 12546-12555
Journal: Polymer - Volume 46, Issue 26, 12 December 2005, Pages 12546-12555
نویسندگان
C.R. Siviour, S.M. Walley, W.G. Proud, J.E. Field,