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DIC辅助机电发光膜传感器用于定量测量全场应变

Guoqing Gu¹, Liya Dai¹, Liyun Chen^2,3

¹School of Civil Engineering, Yancheng Institute of Technology, Yancheng 224051, China.

Sensors (Basel, Switzerland)

|October 16, 2025

概括

这项研究引入了一种新的方法,通过将机械发光 (ML) 成像与数字图像相关性 (DIC) 融合来测量应变场. 这种技术准确量化了应变分布,推进了材料分析.

科学领域:

材料科学材料科学材料科学
机械工程机械工程
光学测量测量光学测量

背景情况:

将机械发光 (ML) 强度映射到应变场上是一个重大挑战.
准确的全场应变测量对于理解负载下的材料行为至关重要.

研究的目的:

通过整合ML成像和数字图像相关性 (DIC) 来开发全场应变测量的量方法.
建立ML强度和应变之间的定量校准模型,以精确重建应变场.

主要方法:

同时采集ML膜传感器的ML图像和DIC的斑点图像,用于对合金样本的拉伸试验.
应用空间注册和区域匹配算法来开发定量校准模型.
使用合金口样本进行验证.

主要成果:

在ML强度和DIC测量的应变之间确立了显著的线性相关性 (R2 = 0.92).
重建的应变场与DIC和有限元素分析 (FEA) 的结果非常一致,平均相对误差为0.23%.

结论:

拟议的方法可以通过将ML信号转换为应变分布,实现高空间分辨率的非接触全场应变测量.
这为研究复杂负载条件下的ML响应机制提供了定量基础.

关键词:

校准模型的校准模型数字图像相关性相关性数字图像相关性电影传感器电影传感器机械发光机械发光机菌株的定量测量菌株的定量测量

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相关概念视频

Measurements of Strain

Measurements of Strain

Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...