کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7889408 1509861 2018 23 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Viscoelastically prestressed polymeric matrix composites: An investigation into fibre deformation and prestress mechanisms
ترجمه فارسی عنوان
کامپوزیت ماتریس پلیمری پیش ساخته شده از پیش ساخته شده: تحقیق در مورد تغییر شکل فیبر و مکانیزم پیش بندر
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
A viscoelastically prestressed polymeric matrix composite (VPPMC) is produced by subjecting polymeric fibres to a creep load, which is removed before moulding the fibres into a polymeric matrix. The resulting fibre viscoelastic recovery creates compressive stresses within the cured matrix. Although mechanical properties can be improved by up to 50%, the effect of fibre creep stress magnitude on VPPMC performance is unknown. In this paper, viscoelastic effects were investigated for 24 h creep stress values of 330-590 MPa. This involved recovery force measurement and wide-angle X-ray diffraction (WAXD) on nylon 6,6 fibres and Charpy impact testing of nylon fibre-polyester resin VPPMCs. Greatest performance was achieved with an intermediate value (460 MPa), suggesting an optimum creep stress condition. Moreover, with increasing creep stress, WAXD demonstrated a progressive reduction in regions with viscoelastic energy storage capability. By considering polymeric three-phase microstructural and latch-based mechanical models, a viscoelastic fibre-generated prestress mechanism is proposed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Part A: Applied Science and Manufacturing - Volume 111, August 2018, Pages 106-114
نویسندگان
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