The Dynamic Properties of Unidirectional Fibre Reinforced Composites in Flexure and Torsion
The Dynamic Properties of Unidirectional Fibre Reinforced Composites in Flexure and Torsion
复制标题
单向纤维增强复合材料的弯扭动态性能
DOI：
10.1177/002199837300700104
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发表时间：
1973
影响因子：
2.9
通讯作者：
D. Bacon
中科院分区：
文献类型：
--
作者：
R. Adams;D. Bacon
复合材料的阻尼的理论预测。新的结果给出的阻尼和动态模量在弯曲和纵向剪切使用非常仔细地制备试样和改进的设备。这些结果的比较，和其他从文献中，与理论表明，在弯曲的实测阻尼较高，扭转低于预测。这种差异的原因进行了详细的调查，它建议，虽然试样缺陷和外来损失总是增加阻尼，纤维错位可能会增加或减少它，和静水应力可能会降低it.The测得的弯曲模量小于预测的混合物的法律，而纵向剪切模量同意密切与方阵预测的亚当斯和多纳。
Theoretical predictions of the damping of composites are presented. New results are given for the damping and dynamic modulus in flexure and longitudinal shear using very carefully prepared specimens and improved apparatus. Comparison of these results, and others taken from the literature, with the theory reveals that the measured damping in flexure is higher and in torsion lower than predicted. Reasons for this discrepancy are investigated in detail and it is suggested that although specimen defects and extraneous losses always increase the damping, fibre misalignment may either increase or decrease it, and hydrostatic stresses may decrease it. The measured flexural modulus is less than that predicted by the law of mixtures, while the longitudinal shear modulus agrees closely with the square array prediction of Adams and Doner.