کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5206619 | 1382314 | 2013 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Tensile properties of semi-crystalline thermoplastic polymers: Effects of temperature and strain rates
ترجمه فارسی عنوان
خصوصیات کششی پلیمرهای ترموپلاستی نیمه بلوری: اثرات دما و میزان فشار
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کلمات کلیدی
خواص کششی، پلیمری ترموپلاستی، تغییر شکل سریع سرعت، استاتیک تجزیه و تحلیل عنصر محدود، نرخ فشار،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
This work deals with the study of temperature and time dependency of tensile properties of a PA 12-based polymer. The range of variation of parameters in experiments was linked to in-service conditions of components manufactured with this material (temperature interval from â25 °C to 50 °C and average strain-rate magnitudes from 0.00028 sâ1 to 9.4 sâ1). For tests with different temperatures and low speed, an electro-mechanical machine, Zwick Z250, equipped with an incremental extensometer was used. To study the effect of strain rate at medium speeds, a servo-hydraulic system, Schenk PC63M, equipped with a strain-gauge extensometer was used, while at high speeds a servo-hydraulic machine, Instron VHS 160/20, equipped with a high-speed camera for strain evaluation by digital image correlation was employed. The changes of the rate of deformation with strain as well as elastic modulus variation with strain were studied. An increase in the elastic modulus and yield strength was observed with a drop in temperature and an increase in the strain-rate, temperature having a stronger influence on the variation of mechanical properties. The collected data was assembled in an elasto-plastic material model for finite-element simulations capable of rendering temperature- and strain-rate-dependency. The model was implemented in the commercial software Abaqus, yielding accurate results for all tests.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Testing - Volume 32, Issue 2, April 2013, Pages 413-425
Journal: Polymer Testing - Volume 32, Issue 2, April 2013, Pages 413-425
نویسندگان
Dan Andrei Åerban, Glenn Weber, Liviu MarÅavina, Vadim V. Silberschmidt, Werner Hufenbach,