کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7212193 | 1469344 | 2018 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Viscoelastically prestressed polymeric matrix composites - Effects of temperature on Charpy impact behaviour
ترجمه فارسی عنوان
کامپوزیت ماتریکس پلی کربنات از پیش پا افتاده به واسکولاسیون - اثرات دما بر رفتار ضربه شارپ
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی (عمومی)
چکیده انگلیسی
By applying tensile creep to polymeric fibres, a viscoelastically prestressed polymeric matrix composite (VPPMC) can be produced by removing the creep load before the fibres are moulded into a resin matrix. The viscoelastically strained fibres impart compressive stresses to the surrounding matrix, following curing. Previous work has demonstrated that nylon 6,6 fibre-polyester resin VPPMCs can improve mechanical properties by up to â¼50%, compared with control (unstressed) counterparts. This paper focuses on the effect of temperature (from â25°C to 45°C) on these composites, under Charpy impact conditions. It was found that impact energy absorption by the VPPMC samples was greater than their control counterparts over the full temperature range, the increases being â¼40% at 20°C and above, reducing to â¼20% at lower temperatures. The principal mechanism for energy absorption from the VPPMC samples was fibre-matrix debonding. At lower temperatures however, resin impact toughness decreased, which facilitated energy absorption through matrix cracking. Here, as VPPMC prestress impeded this effect, energy absorption through matrix cracking was more prominent within the control samples and this is believed to be a major contribution to the observed reduction in VPPMC performance relative to control samples at lower temperatures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Part B: Engineering - Volume 141, 15 May 2018, Pages 265-270
Journal: Composites Part B: Engineering - Volume 141, 15 May 2018, Pages 265-270
نویسندگان
Yang Qin, Kevin S. Fancey,