The elastic moduli of a thick composite as measured by ultrasonic bulk wave pulse velocity
The elastic moduli of a thick composite as measured by ultrasonic bulk wave pulse velocity
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通过超声波体波脉冲速度测量厚复合材料的弹性模量
DOI：
10.1121/1.400714
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发表时间：
1991
影响因子：
2.4
通讯作者：
R. B. Thompson
中科院分区：
文献类型：
--
作者：
E. Papadakis;T. Patton;Y. Tsai;D. Thompson;R. B. Thompson
采用超声声速法测量了局部正交对称的厚壁圆筒缠绕复合材料的弹性模量。基本的假设是，复合材料的小部分可以被视为一个均匀的身体类似于晶体的超声波传播。实验工作和结果最好地表达均匀体理论。由于各向异性很高，层的法线（三个方向）与轴向和环向有很大的不同，因此有必要用c13和c23的近似值计算慢度表面，以便找到坡印亭矢量的方向，用于对c12和c13进行实际测量。
One thick filament-wound composite in the form of a large thick-walled cylinder with locally orthorhombic symmetry has been measured by ultrasonic velocity to calculate its elastic moduli. The basic assumption was that small sections of the composite could be treated as a homogeneous body analogous to a crystal for ultrasonic propagation. The experimental work and the results as best expressing homogeneous body theory are presented. Because of the high anisotropy with the normal to the layers (the three-direction) much different from the axial and hoop directions, it was necessary to calculate slowness surfaces with approximate values of c13 and c23 in order to find the directions of the Poynting vectors to use in making actual measurements on c12 and c13.