Bi-prism-based single-lens three dimensional digital image correlation system with a long working distance: Methodology and application in extreme high temperature deformation test

作     者：WU LiFu YIN YuanJie ZHANG Qi FANG DaiNing ZHANG RuBing ZHU JianGuo XIE HuiMin 

作者机构：AML Department of Engineering Mechanics Tsinghua University Institute of Advanced Structure Technology Beijing Institute of Technology Department of Mechanics School of Civil Engineering Beijing Jiaotong University Faculty of Civil Engineering and Mechanics Jiangsu University 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2018年第61卷第1期

页      面：37-50页

核心收录：

学科分类：08[工学] 0802[工学-机械工程] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11672153 11232008&11227801) 

主　　题：three dimensional digital image correlation(3D DIC) single lens bi-prism high temperature deformation measurement 

摘      要：As a novel three dimensional digital image correlation （3D DIC） method, the bi-prism-based single lens （BSL） 3D DIC method has been proposed and developed in recent years. Making use ofa bi-prism, this method is able to perform a 3D DIC measurement using only a single camera. Thus, the integration level of a BSL 3D DIC system could be much higher than that of the double-camera 3D DIC system. In this paper, using a small-angle bi-prism and a camera with a longer focal length, a special BSL 3D DIC system with a long working distance is designed for measurements in extreme environments. The principle of the system is first studied, and practical methods are then proposed for the system set-up and the determination of system parameters. Then, feasibility of the measurement system is verified by out-of-plane rigid-body translation tests. Finally, the BSL 3D DIC system is proven to be capable of combining with a high-temperature testing instrument to perform deformation tests in a high-temperature environment of up to 1500℃.