EFFECT OF NANO-RENFORCEMENT SHAPES ON THE PROPERTES OF ]EPOXY]BASED) NANOCOMIPOSITES: FRACTURE TOUGHINESS
- سال انتشار: 1390
- محل انتشار: سومین کنفرانس بین المللی مواد فوق ریزدانه و نانوساختار
- کد COI اختصاصی: UFGNSM03_062
- زبان مقاله: انگلیسی
- تعداد مشاهده: 334
نویسندگان
Fatigue and Fracture Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran, ۱۶۸۴۶, Iran.
R Fatigue and Fracture Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran, ۱۶۸۴۶, Iran.
Fatigue and Fracture Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran, ۱۶۸۴۶, Iran.
Fatigue and Fracture Laboratory, Center of Excellence in Experi | Solid Mechanics and Dy iresSchool of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran, ۱۶۸۴۶, Iran.
چکیده
The carbonic mano-reinforcements have revolutionized the nanocomposites research society. Several researchers have studied the effects of these nano-particles on different physical properties of nanocomposites. However, the geometry effects of these nano-particles on their efficiency as reinforcements have not been investigated. In the present study, the effects of three different shapes of carbonic nano-reinforcement, including the spherical (nano-diamond (ND)), cylindrical (carbon nano fiber (CNF)) and platelet (graphene oxide (GO), on the fracture toughness of epoxy-based nanocomposites were investigated. While addition of the ND particles to pure epoxy led to inferior properties, GO was found as a promising candidate to improve the fracture toughness of epoxy. The experimental results showed that addition of 0.5 wt.% of GO and CNF could enhance the fracture toughness up to 23% and 19%, respectively. However, the ND particles with the spherical shape did not show any beneficial effects on the fracture toughness of epoxy and even reduced it about 9%. To justify the obtained trend of results, the effect of nano-filler shapes on the fracture toughness mechanisms of nanocomposites was investigated. Moreover, the effects of presence of mentioned nano-reinforcement on the observed features of fracture surface of specimens was analyzed using the scanning electron microscopy imaging.کلیدواژه ها
fracture toughness, manocomposites, shape effect, carbonic nano-reinforcementsمقالات مرتبط جدید
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