Numerical analysis and experimental observation of ultrasonic wave propagation in CFRP with curved fibers
Numerical analysis and experimental observation of ultrasonic wave propagation in CFRP with curved fibers
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DOI：
10.1016/j.compstruct.2018.03.089
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发表时间：
2018-06-15
影响因子：
6.3
通讯作者：
Suzuki, Yoshiro
中科院分区：
文献类型：
--
作者：
Ashizawa, Takeshi;Mizutani, Yoshihiro;Suzuki, Yoshiro
直纤维单向CFRP中超声波的传播方向与各向异性主轴方向之间的关系是众所周知的。然而，超声波在具有弯曲纤维的CFRP中的行为尚未详细阐明。本文采用有限差分法进行数值分析，以可视化同心弯曲纤维 CFRP 中的超声波行为。数值模拟结果表明准纵向超声波的能量沿纤维方向弯曲。为了验证分析结果，利用3D打印机制备了具有弯曲纤维的CFRP样品，并利用激光超声系统观察了超声传播行为。观测结果证实了超声波沿碳纤维弯曲的分析结果。
The relationship between the propagation directions of ultrasonic wave and the direction of the principal axis of anisotropy in uni-directional CFRP with straight fiber is well known. However, the behavior of ultrasonic wave in CFRP with curved fibers is not clarified in details. In this paper, numerical analyses using the finite difference method were conducted to visualize the behavior of ultrasonic waves in CFRP with concentrically curved fibers. Numerical simulation results showed the energy of quasi-longitudinal ultrasonic wave curved along the fiber direction. In order to confirm the analytical result, CFRP specimen with curved fibers were prepared by utilizing 3D-printer and the behavior of ultrasonic propagation was observed by using Laser ultrasonic system. The observed results confirmed the analytical results that the ultrasonic wave curved along carbon fibers.