Measurement of Damping of Fiber Reinforced Composite Material
Measurement of Damping of Fiber Reinforced Composite Material作者机构：Department of Mechanical Engineering Dr B R Ambedkar National Institute of Technology Jalandhar India Department of Mechanical Engineering Indian Institute of Technology New Delhi India
出 版 物：《材料科学与工程（中英文B版）》 (Journal of Materials Science and Engineering B)
年 卷 期：2011年第1卷第5期
页 面：555-564页
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 080101[工学-一般力学与力学基础] 0801[工学-力学（可授工学、理学学位）]
主 题：增强复合材料 准确测量 过阻尼 粘弹性模型 损耗因子 光纤 剪切频率 应变振幅
摘 要：Mechanical systems are characterized through accurate measurement of damping. System damping is related to total energy dissipated within the structure i. e., energy dissipated at the joint, fasteners and interphase in addition to energy dissipated due to the material. In this paper a mathematical model had been developed by combing the four parameter viscoelastic model and bridging model. This model has the capability to predict the loss factor of lamina and with any combination of materials provided the material loss factor of constituent elements are known. Effect of frequency on four loss factors namely longitudinal, transverse, transverse shear and longitudinal shear loss factor of Glass fiber reinforced epoxy (GFRE) has been obtained by using this developed model. Results obtained by this model are validated experimently using Dynamic Mechanical Analyzer (DMA). Further effect of frequency (1-100 Hz) on longitudinal, longitudinal shear, transverse and transverse shear loss factors has been measured. Variation of strain amplitude on longitudinal and transverse loss factors has also been measured. Effect of strain variation has been evaluated at different frequency. Effect of fiber angle on damping has been measured. Loss factors increases with increase of strain and strain amplitude.
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