数字图像相关技术在应力应变测量中的发展与最新应用

摘要

In the area of modern materials stress and strain measurement,DIC(digital image correlation) has the advantages of non-contact,full field,low requirement of experimental conditions and high precision.It is an effective and practical method of stress and strain measurement,which is widely used in experimental mechanics and other fields.In this paper,the development of DIC in materials stress and strain is summaried and DIC is compared with other measurement techniques.Then,the system structure,related algorithms and search methods of DIC are introduced.Finally,the latest applications and new products of DIC in stress and strain of materials are listed.%在现代材料的应力应变测量中,数字图像相关测量法具有非接触、全场性、对实验条件要求低、精度高等优点,是一种有效、实用的应力应变测量方法,被广泛的应用于实验力学及其他学科领域.本文综述了数字图像相关技术在材料应力应变方面的发展;将数字图像相关技术与其它测量技术进行了比较;介绍了数字图像相关技术的系统结构与相关算法、搜索方法;最后列举了数字图像相关技术在材料应力应变中的最新应用和新产品.