非线性超声波成像用于孔隙性评估.
Mario Emanuele De Simone1, Salvatore Boccardi1, Gian Piero Malfense Fierro2
1Department Aeronautics and Astronautics, University of Southampton, Southampton SO17 1BJ, UK.
Sensors (Basel, Switzerland)
|July 29, 2023
概括
这项研究引入了两种非线性超声波成像方法,以准确检测和量化复合材料中的多孔性. 这些技术为质量控制和预测材料性能提供了一种敏感的,非破坏性的方法.
科学领域:
- 材料科学 材料科学 材料科学
- 非破坏性测试 不破坏性测试
- 复合材料 复合材料 复合材料
背景情况:
- 孔隙性显著影响复合板材的机械行为和使用寿命.
- 准确评估孔隙性对于质量控制和材料性能预测至关重要.
- 非线性超声波提供高灵敏度检测小缺陷,如毛孔.
研究的目的:
- 开发和介绍一种先进的成像方法,用于可视化复合材料中的多孔性场.
- 评估两个新型的非线性超声波技术的有效性,以评估孔隙性.
主要方法:
- 利用非线性超声波技术,使用来自相位阵列系统的反散射信号.
- 方法1:从微气泡反射中分析半波频率组件.
- 方法2:计算衰减系数的频率导数,将其与孔径含量相关联.
主要成果:
- 两种拟议的非线性超声波方法在孔隙性评估中都表现出高准确度,相比传统的C-scan.
- 减弱系数方法在定义气泡形状方面表现出卓越的准确性,特别是当表面影响最小时.
- 这些技术成功地在实验复合样本中成像了多孔性场.
结论:
- 非线性超声波为复合材料的多孔性成像提供了高度准确和敏感的方法.
- 开发的方法提高了质量控制,并使在服务条件下更好地预测材料的行为.
- 这些技术代表了复合材料的非破坏性评估的重大进步.
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