基于染料的光弹性涂层方法回顾与展望

光弹性涂层法是最常用的实验应变分析测试技术之一,但其实际应用受到诸如准备时间长、基底加强效应、复杂的数据后期处理等固有局限性的影响。近年来,出现了两种通过在光弹性聚合物材料中添加非发光染料或发光染料的新的光弹性涂层制作方法。这种基于染料的光弹性涂层使新方法能够克服上述传统光弹性涂层法应用中的许多局限性,并有望成为重要的应变测量工具。论文回顾了这两种新的基于染料的光弹性涂层方法的提出与发展过程,分别介绍了两种测量方法的实验装置、基本原理及一些实际应用,总结了两种新方法各自的优点与不足。最后指出了基于添加发光染料的发光光弹性涂层的未来发展方向和技术改进。

Review and Prospect of Dye-based Photoelastic Coating Method

Photoelastic coating method is one of the most practical measuring techniques for experimental strain analysis. However, its practical applications have always been affected by various inherent shortcomings such as long preparation time, reinforcing effects from substrate and complex data post-processing. In recent years, two new photoelastic coatings fabricated by adding either non-luminescent dye or luminescent dye into photoelastic polymer materials have been proposed and well developed. The benefits brought by these dye-based photoelastic coatings have made the modified photoelastic coating method overcome above shortcomings from conventional method, and become one of the most prevalent full-field strain measuring tools. The emergence and evolution of above two dye-based photoelastic coating methods, experimental setups, basic principle and some practical application are reviewed, and their main advantages and deficiencies are analyzed in this paper. In addition, the future development trends and technical improvements of developing photoelastic coating containing luminescent dye are also proposed.