在薄板中的微裂纹定向的表征,使用由事件超声波羔羊波产生的准静态元件
Liang Zhao1,2, Jun Zhou1,2,3, Weifeng Yuan1
1Key Laboratory of Testing Technology for Manufacturing Process MOE, Southwest University of Science and Technology, Mianyang 621010, China.
Sensors (Basel, Switzerland)
|January 11, 2025
概括
这项研究表明,固体板中的微裂产生的准静态元件 (QSC) 的导向性可以决定裂的方向. 这种微裂纹方向表征方法不需要基线信号.
科学领域:
- 固体机械学 固体机械学
- 非线性声学是一种非线性声学.
- 材料科学 是一种材料科学.
背景情况:
- 固体板中的微裂对结构完整性构成风险.
- 评估微裂纹的方向对于损害评估至关重要.
- 现有的裂表征方法可能很复杂或需要基线数据.
研究的目的:
- 量化研究准静态元件 (QSC) 的导向性,用于微裂纹方向评估.
- 在没有基线信号的情况下开发一种新的方法来表征微裂方向.
- 探索QSC指导性和微裂纹导向之间的关系.
主要方法:
- 基于双线性应力-应变构成模型的3D有限元模型 (FEM) 的开发.
- 模拟主Lamb波 (A0模式) 和微裂之间的非线性相互作用.
- 通过接触声学非线性 (CAN) 诱导的准静态元件 (QSC) 的分析.
主要成果:
- 微裂所辐射的QSC的导向性与它的方向直接相关.
- QSC 的振幅受微裂纹表面的接触面积的影响.
- 微裂纹定向可以通过分析QSC指导性来表征.
结论:
- QSC的指令性提供了一种可行的方法来表征薄型固体板中的微裂纹方向.
- 这种方法消除了对基线信号的需求,简化了评估过程.
- 这些发现有助于用于物质损害评估的先进的非破坏性评估技术.
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