建模的电流 测试碳纤维结构中的差距,基于线条近似
Till Schulze1,2, Maren Rake1, Dirk Hofmann1
1Fraunhofer Institute for Ceramic Technologies and Systems IKTS, 01109 Dresden, Germany.
Sensors (Basel, Switzerland)
|February 13, 2026
概括
这项研究引入了一种新的有限元建模方法,用于碳纤维复合材料,通过旋流测试来改善缺陷检测. 经过验证的模型准确地模拟了电磁性质,并识别了差距,提高了制造质量控制.
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
- 计算电磁学 计算机电磁学
背景情况:
- 碳纤维增强复合材料 (CFRP) 的缺陷,如空隙和分层,会损害结构完整性.
- 厄迪电流测试 (ECT) 对于在CFRP制造中早期检测缺陷至关重要.
- 经过验证的电磁建模对于推进ECT传感器开发和信号解释至关重要.
研究的目的:
- 为CFRP开发一种新的有限元素建模 (FEM) 方法,以考虑纤维异质性.
- 为了提高ECT模拟的准确性,用于缺陷表征.
- 根据实验性ECT数据验证拟议的FEM方法.
主要方法:
- 一个有限元建模方法,使用spline近似来表示纤维异质性.
- 适应性网状精细化以最大限度地减少FEM解决方案错误.
- 通过四端电阻测量模拟层间电流路径.
- 通过调整线近似来模拟像空隙这样的缺陷.
主要成果:
- 提出的FEM方法成功地模拟了CFRP结构的电磁性质.
- 模拟准确地预测各种缺陷大小的流信号.
- 模型中的虚拟扫描显示出与实验性ECT扫描真实和人工隙的CFRP样本的强烈一致.
结论:
- 新的FEM方法提供了一种经过验证的方法,用于模拟CFRP的旋流测试.
- 这种技术增强了对ECT信号的理解,并有助于开发新的传感器.
- 该模型能够考虑纤维异质性和层间电流,从而提高了复合材料制造中的缺陷检测准确性.
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