Effect of fiber volume fraction on modal properties of three-dimension braided composite t-beams

被引：0
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作者：
Tianjin and Ministry of Education Key Laboratory of Advanced Textile Composite Materials, Institute of Composite Materials, Tianjin Polytechnic University, Tianjin [1 ]
300387, China
机构：
来源：
Cailiao Gongcheng | / 9卷 / 80-86期
关键词：
Modal analysis - Carbon fibers - Volume fraction - Composite materials - Damping;
D O I：
10.11868/j.issn.1001-4381.2015.09.013
中图分类号：
学科分类号：
摘要：
The modal properties of carbon fiber three-dimension and four-direction braided composite T-beams with different fiber volume fractions were studied by the free vibration method of cantilever beams. The effect of fiber volume fraction on natural frequency and damping was analyzed. The measured and finite element calculated results of natural frequency were compared. The results show that the modal properties of T-beams have nothing to do with the position of excitation point. The natural frequency of the composite T-beams increases and damping properties of the composite T-beams decrease with the increasing of fiber volume fraction. The order of the natural frequency of T-beam could be estimated accurately by the mode shape. The measured results are in agreement with the calculated results. ©, 2015, Beijing Institute of Aeronautical Materials (BIAM). All right reserved.
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