对疲劳表面微裂纹进行非线性雷利波检测的模拟和实验
Ne Liu1, Shuyun Cheng1, Jiaqi Fan2
1Key Laboratory of Nondestructive Testing (Ministry of Education), Nanchang Hangkong University, 330063 Nanchang, PR China.
Ultrasonics
|November 3, 2024
概括
非线性超声波检查显示,在评估疲劳损伤时,非线性系数在0.3λ波长附近达到顶峰. 分析了模拟和实验结果之间的差异,分析了裂深度和系数变化.
科学领域:
- 材料科学 材料科学 材料科学
- 非线性声学 非线性声学
- 非破坏性测试 不破坏性测试
背景情况:
- 非线性超声波检查利用超声波与疲劳损伤相互作用生成的高波来评估材料性能.
- 了解非线性声学行为与材料降解之间的关系对于有效的非破坏性评估至关重要.
研究的目的:
- 在非线性超声波检查中调查和比较模拟分析和实验测量的结果.
- 分析模拟和实验数据之间关于裂深度和非线性系数行为的观察到的差异.
主要方法:
- 进行非线性超声波实验,以测量更高波的产生.
- 执行模拟分析,以建模超声波与疲劳损伤的相互作用.
- 将实验测量结果与模拟结果进行比较,以确定差异.
主要成果:
- 模拟和实验结果都表明,非线性系数增加,达到0.3λ波长的最大值,然后稳定.
- 在裂深度中观察到的关键差异与最大非线性系数相对应,以及非线性系数的相对变化.
结论:
- 该研究强调了在非线性超声波检查中模拟和实验数据之间的差异,特别是关于裂的特征.
- 对这些差异的分析为完善非线性雷利波的评估机制提供了基础,以评估疲劳损伤.
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