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RISS 인기검색어
- 검색키워드
- 저자 : Ali Selk Ghafari (검색결과 1 건)
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Abolghassem Zabihollah,Saman Momeni,Ali Selk Ghafari 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.1
The dynamic behavior of nonuniform-thickness laminated composite beams, such as helicopter blades, wind turbine blades, and robotarms, is of high importance in the design and fabrication of such elements. Changing the thickness of laminated structures is a significantchallenge during fabrication because different tapering configurations may significantly alter the stiffness of the structures and thus thedynamic response of the structures. In this study, the effect of adding nanoparticles to resin on the stiffness and dynamic behavior ofnonuniform-thickness laminated composite beam elements was investigated. A set of experiments were conducted to examine the naturalfrequencies and damping coefficients of nonuniform-thickness laminated composite beams with different tapering configurations. Addingnanoparticles up to 3% increased the natural frequencies for all tapering configurations. Beyond 3% and up to 7% of nanoparticles,the natural frequency of the beam decreased. The addition of 10% of nanoparticles to resin sharply reduced the natural frequency of thebeam but significantly improved the damping coefficient for all the investigated taper models.
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