纤维增强复合薄板的损坏识别曲率模态形状扫描方法曲率模态形状扫描方法
Yougle Chang1,2, Qi Zhao1, Hao Han1
1Shijiazhuang Division of PLAA Infantry College, Shijiazhuang 050011, China.
Materials (Basel, Switzerland)
|June 13, 2025
概括
本研究介绍了一种基于激光的方法,用于检测纤维增强复合材料薄板 (FCTP) 的损伤. 曲率模态形状扫描方法 (CMSSM) 准确地识别了纤维断裂位置,为结构健康监测提供了实际指导.
科学领域:
- 结构健康监测 结构健康监测
- 复合材料科学 复合材料科学
- 振动分析 振动分析
背景情况:
- 纤维增强复合薄板 (FCTP) 易受损坏,需要精确的检测方法.
- 现有的方法可能缺乏精确损伤定位所需的灵敏度或准确性.
- 曲率模态形状对局部刚度变化很敏感,这使得它们对损坏检测非常有希望.
研究的目的:
- 开发和验证一种曲率模态形状扫描方法 (CMSSM),用于检测FCTP中的损坏.
- 建立一个损害局部化定量指数.
- 调查各种参数对损坏检测准确性的影响.
主要方法:
- 为FCTP建造一个激光扫描框架模型.
- 开发一种二维的五点三倍表面平滑方法,用于模态形状数据的提取.
- 使用自主开发的激光扫描振动测试系统来测量操作偏斜形状.
- 使用TC500纤维/环氧复合板进行实验验证.
主要成果:
- 开发的CMSSM准确地检测了FCTP中纤维断裂的位置.
- 成功得出了定量损害局部化指数.
- 该研究确定了影响损坏检测的关键参数,包括边界约束,激发水平和激光扫描速率.
结论:
- CMSSM是FCTP中损坏位置检测的高度准确和有效方法.
- 衍生损害局部化指数提供了可靠的定量衡量标准.
- 了解运行参数的影响,提高了结构完整性评估方法的实际适用性.
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