文章基本信息

标题：Theoretical analysis of fundamental natural frequency with different boundary conditions of isotropic hyper composite plate
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作者：Abdulkareem Abdulrazzaq Alhumdany ; Muhannad Al-Waily ; Mohammed HusseinKadhim 等
期刊名称：International Journal of Energy and Environment
印刷版ISSN：2076-2895
电子版ISSN：2076-2909
出版年度：2016
卷号：7
期号：3
页码：229-240
出版社：International Energy and Environment Foundation (IEEF)
摘要：This research presented isotropic hyper composite plates structures, which are made of (resin and fiber with powder as a reinforcement material). The basic item of this research is to improve the dynamical properties of the composite structure. This item has been verified by adding the powder as a reinforcement material. Square and rectangular hyper composite plates (AR=1 and 1.5) are made with different volume fractions for glass powder, resin and short fiber. Different boundary conditions are used (SSSS, CCSS, CCCC, CFFF, SSFF and CCFF) to support these plates. The dynamical properties of hyper composite models are calculated numerically with considering these different parameters. The results showed that the natural frequency increases by increasing the volume fraction of powder or short fiber with decreasing the resin. It can be concluded that the fundamental natural frequency in aspect ratio (AR=1) increased successively with the boundary conditions (CFFF, SSFF, SSSS, CCFF, CCSS, and CCCC) in ascending order, because the increasing in stiffness of the composite plate depends on the supporting conditions. And, for aspect ratio (AR=1.5), the fundamental natural frequency is increased successively with the boundary conditions (CCFF, CFFF, SSFF, SSSS, CCSS, and CCCC) in ascending order. Also the results showed that the fundamental natural frequency of aspect ratio 1 is larger than 1.5, because the ratio between stiffness to weight for AR=1 is larger than AR=1.5.A comparison made between present numerical results and results presented by former published paper Abdulkareem et.al. [8] and theoretical results by Muhannad Al-Waily [9] for simply supported plate with aspect ratio (AR=1, a=b=25 cm and h=5 mm) and different volume fractions of resin, powder and short fiber and good agreement were the maximum error between numerical and experimental isresults is about 5.73% (with 20% short reinforcement fiber, 30% powder reinforcement and 50% resin materialswhile the maximum error between numerical present results and theoretical results; Muhannad Al-Waily, [9] is about 12.86% (with 30% short reinforcement fiber, 20% powder reinforcement and 50% resin materials).
关键词：Hyper composite plate; Fundamental natural frequency; Glass powder; Dynamical properties; Numerical study