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| 温度对层压碳纤维增强复合材料导波检测的影响 |
| Effect of temperature on guided wave detection of laminated carbon fiber reinforced composites |
| 投稿时间：2025-04-14 修订日期：2025-06-09 |
| 中文摘要: |
| 为获取层压碳纤维增强复合材料的高温声学性质，搭建了高温声速测量实验平台，通过脉冲回波法测量了复合材料20~200℃的纵波声速。随着温度从20℃升高到200℃，复合材料的纵波速度从2685 m/s下降到2210 m/s。利用实验数据拟合了复合材料中的温度-声速曲线，并与不锈钢进行对比，其声速随温度的变化是不锈钢的2.7倍。进一步，基于实验数据分析了温度对层压碳纤维增强复合材料导波频散的影响，分别通过温度分层模型的全局矩阵法与有限元仿真两种方法对温度分层复合材料板中的频散曲线进行了计算，发现温度分层模型的全局矩阵法能够有效计算一侧表面加热的板的频散曲线。温度对复合材料板中的频散曲线影响远大于不锈钢板，在导波检测中必须考虑温度的影响。 |
| 英文摘要: |
| To investigate the high-temperature acoustic properties of laminated carbon fiber reinforced composites, a high-temperature sound speed measurement experimental setup is established. The longitudinal wave velocity of the composite material is measured in the temperature range of 20 to 200°C. The longitudinal wave velocity of the composite decreases from 2685 m/s at 20 °C to 2210 m/s at 200 °C. Based on experimental data, a temperature-velocity curve for the composite is fitted and compared with stainless steel, showing a temperature dependence 2.7 times greater than that of stainless steel. Furthermore, the impact of temperature on guided wave dispersion in the composites is analyzed using experimental data. The dispersion curves of temperature-gradient composite plates are calculated using both the global matrix method and finite element simulation. It is found that the global matrix method effectively computes the dispersion curves of plates heated on one surface. The influence of temperature on the dispersion curves of composite plates is significantly greater than that on stainless steel plates, highlighting the necessity of temperature effects in guided wave detection. |
| DOI： |
| 中文关键词: 复合材料 频散曲线 高温 导波检测 |
| 英文关键词: Composites Dispersion curves High temperature Guided wave detection |
| 基金项目: |
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