کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1465926 1509893 2015 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Retention of mechanical performance of polymer matrix composites above the glass transition temperature by vascular cooling
ترجمه فارسی عنوان
حفظ عملکرد مکانیکی کامپوزیت ماتریکس پلیمری بالاتر از دمای انتقال شیشه توسط خنک کننده عروقی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی

An actively cooled vascular polymer matrix composite containing 3.0% channel volume fraction retains greater than 90% flexural stiffness when exposed continuously to 325 °C environmental temperature. Non-cooled controls suffered complete structural failure through thermal degradation under the same conditions. Glass–epoxy composites (Tg = 152 °C) manufactured by vacuum assisted resin transfer molding contain microchannel networks of two different architectures optimized for thermal and mechanical performance. Microchannels are fabricated by vaporization of poly(lactide) fibers treated with tin(II) oxalate catalyst that are incorporated into the fiber preform prior to resin infiltration. Flexural modulus, material temperature, and heat removal rates are measured during four-point bending testing as a function of environmental temperature and coolant flow rate. Simulations validate experimental measurements and provide insight into the thermal behavior. Vascular specimens with only 1.5% channel volume fraction centered at the neutral bending axis also retained over 80% flexural stiffness at 325 °C environmental temperature.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Part A: Applied Science and Manufacturing - Volume 78, November 2015, Pages 412–423
نویسندگان
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