標題: Effect of fiber array on damping behaviors of fiber composites
作者: Tsai, Jia-Lin
Chi, Yang-Kai
機械工程學系
Department of Mechanical Engineering
關鍵字: microstructures;micromechanics;fiber array;damping
公開日期: 1-Oct-2008
摘要: This study aims to investigate the fiber array effect on modal damping behaviors of fiber composites. Three different fiber arrays, i.e., square edge packing (SEP), square diagonal packing (SDP), and hexagonal packing (HP), were considered to represent the microstructures of the unidirectional composites. Repeating unit cells (RUCs) suitable for describing the characteristics of the microstructure were adopted in the generalized method of cell (GMC) micromechanical analysis. The energy dissipation concept was then employed to calculate the specific damping capacities of composites in the material principal directions. The specific damping capacities obtained from micromechanical analysis were regarded as the equivalent damping properties homogenizing in the composites. In conjunction with the modal shapes of the composite structures determined from the finite element analysis, the specific damping capacity was extended to characterize the corresponding modal damping of the composite rods and plates. Both free-free and clamped-free boundary conditions were taken into account in the composite structures. Results indicated that the structures constructed from the composites with SDP fibers exhibit better damping behaviors than the other two cases. (c) 2008 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.compositesb.2008.03.003
http://hdl.handle.net/11536/8292
ISSN: 1359-8368
DOI: 10.1016/j.compositesb.2008.03.003
期刊: COMPOSITES PART B-ENGINEERING
Volume: 39
Issue: 7-8
起始頁: 1196
結束頁: 1204
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