A 2D mark shearing technique for characterizing the mechanical properties of material

被引：8

作者：

Hua, Tao ^{[1
]}

Xie, Huimin ^{[1
]}

Dai, Fulong ^{[1
]}

Chen, Pengwan ^{[2
]}

Zhang, Qingming ^{[2
]}

机构：

[1] Tsinghua Univ, Dept Engn Mech, AML, Beijing 100084, Peoples R China

[2] Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100084, Peoples R China

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 2010年 / 21卷 / 02期

基金：

中国国家自然科学基金;

关键词：

2D mark shearing; four-prism system; DIC; strain measurement; DIGITAL IMAGE CORRELATION; SPECKLE-DISPLACEMENT; DEFORMATION;

D O I：

10.1088/0957-0233/21/2/025311

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The digital image correlation (DIC) method has been widely used in mechanical experiments due to their non-contact, full-field feature and high accuracy in displacement measurement. Yet the precision in strain determination is not so desirable. In this paper, a 2D mark shearing technique was proposed to improve the accuracy of the strain measurement in both vertical direction and horizontal direction. A four-prism system was designed and used to introduce a shearing distance of the marks, which were made on the specimen to calculate the two strain components. The measurement principle of the mark shearing technique is described in detail. A tensile experiment using an aluminum sample was conducted, and the Young's modulus and Poisson ratio were measured. The successful experimental results demonstrated the feasibility of this method.

引用

页数：6

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