کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7212611 | 1469389 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of strain rate on mechanical properties of nanosilica/epoxy
ترجمه فارسی عنوان
اثرات نرخ کرنش بر خواص مکانیکی نانوسیلیس / اپوکسی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی (عمومی)
چکیده انگلیسی
The mechanical properties (i.e., stress-strain relationship and peak stress) of nanosilica filled epoxies were studied using an Instron machine and a split Hopkinson pressure bar apparatus over a range of strain rates from 8Â ÃÂ 10â4Â sâ1 up to â¼5Â ÃÂ 103Â sâ1 under uniaxial compression. It was found that the nanosilica particles only reinforce epoxies slightly under both quasi-static and dynamic loading conditions. With a unit cell model, it was observed that owing to the existence of nanosilica, the surrounding strain field was changed and the strain-softening characteristics of the epoxy introduced a negative effect of the nanosilica particles as a reinforcement agent. That is, the particle strengthening effect depended on the mechanical characteristics of epoxy matrix. This was further confirmed by numerically simulating the mechanical behaviors of the composites for which (a) the matrix might assume different strain-softening or strain-hardening characteristics and (b) there were higher loadings of rigid silica particles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Part B: Engineering - Volume 96, 1 July 2016, Pages 119-124
Journal: Composites Part B: Engineering - Volume 96, 1 July 2016, Pages 119-124
نویسندگان
Ying-Gang Miao, Hong-Yuan Liu, Tao Suo, Yiu-Wing Mai, Fa-Qin Xie, Yu-Long Li,