Nonlinear NDE using contact acoustic nonlinearity (CAN)
Nonlinear NDE using contact acoustic nonlinearity (CAN)
复制标题
使用接触声学非线性 (CAN) 的非线性 NDE
DOI：
10.1109/ultsym.1994.401817
复制
发表时间：
1994
期刊：
影响因子：
--
通讯作者：
I. Solodov
中科院分区：
文献类型：
--
作者：
I. Solodov
对静载荷压缩的非粘结固态接触的声学非线性特性进行了实验研究。主要关注的是由于声波引起的接触不连续性而导致的“扑动”CAN 机制。实验中记录了次谐波和超谐波的产生以及混沌 CAN 行为。 CAN 被证明负责 SAW 的有效非线性散射，提供反射波的逆光谱成分。还证明了小表面断裂缺陷的反射模式非线性无损检测的可行性
Acoustic nonlinear properties of a nonbonded solid-state contact compressed by a static load were studied experimentally. Main attention was paid to a “flapping” CAN mechanism attributed to the contact discontinuity caused by an acoustic wave. Sub- and super- harmonic generation and chaotic CAN behavior were registered in the experiment. CAN was shown to be responsible for an efficient nonlinear scattering of SAWs providing inverse spectral composition of a reflected wave. The feasibility of reflection-mode nonlinear NDE of small surface fractured defects was also demonstrated