Finite Element Simulation of Nonlinear Acoustic Behavior at Minute Cracks Using Singular Element
Finite Element Simulation of Nonlinear Acoustic Behavior at Minute Cracks Using Singular Element
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使用奇异元对微小裂纹处的非线性声学行为进行有限元模拟
DOI：
10.1143/jjap.40.3579
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发表时间：
2001
影响因子：
1.5
通讯作者：
N. Nishimura
中科院分区：
文献类型：
--
作者：
Jyun;T. Ito;K. Kawashima;N. Nishimura
本文对含由气泡形核的微裂纹的模型板进行了波传播的有限元模拟。微裂纹采用奇异单元模拟，该单元表达裂纹表面的非线性应力应变。模拟了透射波通过这些裂纹的情况，并对二次谐波的幅值进行了快速傅立叶变换（FFT）处理。对于振幅为5-20 nm的入射波，二次谐波分量与基波分量的比率随着入射波振幅的增加而增加。模拟结果定性地证实了测量的非线性声响应的剥落样品。
A finite element method (FEM) simulation of wave propagation is performed for a model plate which includes minute cracks nucleated by spallation. The minute cracks are modeled by singular elements which express nonlinear stress-strain at the crack surfaces. The transmitted wave through these cracks is simulated and the 2nd harmonic amplitude is processed by fast fourier transform (FFT). The ratio of the 2nd harmonic component to the fundamental one increases with an increase in the incident wave of amplitude for the incident wave of amplitude 5–20 nm. The simulated results qualitatively confirm the measured nonlinear acoustic response on spalled samples.
影响因子：
4.5
作者：
J. Bussière
通讯作者：
J. Bussière