水转印栅线聚氨酯大变形及动态力学特性测量  

Water Transfer Printing Grating for Measuring Large Deformation and Dynamic Properties of Polyurethane

作　　者：马银行[1] 徐燕[1] 吴敏杨 程昊 杨福俊[1] Ma Yinhang;Xu Yan;Wu Minyang;Cheng Hao;Yang Fujun(Jiangsu Key Laboratory of Engineering Mechanics,Southeast University,Nanjing,Jiangsu 211189,China;Science Technology on Reliability and Environment Laboratory,Beijing Institute of Structure and Environment Engineering,Beijing 100076,China)

机构地区：[1]东南大学江苏省工程力学重点实验室,江苏南京211189 [2]北京环境强度研究所可靠性与环境工程技术重点实验室,北京100076

出　　处：《光学学报》2022年第1期44-50,共7页Acta Optica Sinica

基　　金：国家自然科学基金(12072073,11772092)。

摘　　要：将水转印工艺与数字图像处理方法结合,提出水转印栅线相移云纹法,该方法可用于聚氨酯类超弹性材料大变形测量。通过水转印制作试件栅与参考栅,并采用计算机对两者的数字图像进行算术相减,得到数字相移云纹条纹;运用Carré算法从相移云纹条纹图中提取出面内变形相关的相位。所提方法仅用一幅试件栅与参考栅图像实现试样变形信息的自动、准确提取,可为动态大变形的测量提供一种成本低、有效精确的测试手段。给出了所提方法用于聚氨酯圆环静载压缩变形定量测量,及圆棒的冲击压缩动态变形特性实验研究的结果。A phase-shifting moiré method based on the techniques of water transfer printing grating and digital image processing was proposed for measuring the large deformation of superelastic materials such as polyurethane. Gratings were bonded onto the surfaces of a specimen and a reference object using the water transfer printing technique, and digital phase-shifting moiré fringe patterns were obtained by subtracting the specimen image from the reference grating images. The phase related to in-plane deformation was extracted from the phase-shifting moiré fringe patterns using the Carré algorithm. By using only one specimen grating image and one reference grating image to automatically yield deformation information with high accuracy, the proposed method could be used for dynamic deformation measurements with low cost, high efficiency, and high accuracy. Experiments were performed to quantitatively determine the deformation of polyurethane hoops under compression and study the mechanical response of a polyurethane bar under impact loading. Results demonstrate the validity of the proposed method.

关 键 词：光栅 水转印栅法 数字相移云纹 变形测量 

分 类 号：O348.1[理学—固体力学]