用有限元建模策略来确定热弹性生成的激光超声波的导向性
Xin L Tu1, Jie Zhang1, Alberto M Gambaruto2
1School of Electrical, Electronic and Mechanical Engineering, University of Bristol, Queen's Building, Bristol, BS8 1TR, UK.
Ultrasonics
|January 26, 2024
概括
本研究介绍了一种有限元方法,用于模拟CFRP等复杂材料中的激光超声波导向性. 该研究验证了与的模型,并确定了检查这两种材料的最佳波形模式.
科学领域:
- 材料科学 材料科学 材料科学
- 非破坏性评估 (NDE) 是一种非破坏性评估.
- 声学 声学 在声学方面
背景情况:
- 激光超声波 (LU) 是一种非接触式近临终体验技术.
- 了解LU指导性对于检查碳纤维增强塑料 (CFRP) 等复杂材料至关重要.
- 现有的模型仅限于异质的,异性质的材料.
研究的目的:
- 开发和验证有限元 (FE) 建模方法论,用于复杂材料中的LU导向性.
- 将该方法应用于 (Al) 和CFRP.
- 为了确定这些材料中NDE的最佳超声波模式.
主要方法:
- 一个模拟热膨胀和弹性动力负荷的多物理FE模型.
- 对的分析解决方案进行验证.
- 应用于CFRP,包括用于剪切波分析的头波抑制.
- 使用最大概率估计,将建模的指导性与实验数据相匹配.
主要成果:
- 该FE模型准确地预测了中的LU导向性.
- 对于,由于振幅更高,剪切 (S) 波比纵向 (L) 波更受欢迎.
- 对于CFRP,准纵向 (qL) 波表现出直接在源下方的最大振幅,并且在检查中优于准剪切 (qS) 波.
结论:
- 开发的FE方法对于预测复杂材料中的LU导向性是有效的.
- 该研究为和CFRP的NDE选择最佳波形模式提供了指导.
- 这项工作促进了LU用于检查先进复合材料的应用.
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