Surface deformation measurements of a cylindrical specimen by digital image correlation

被引：63
作者：
Lu, H
Vendroux, G
Knauss, WG
机构：
[1] CALTECH,GRAD AERONAUT LABS,PASADENA,CA 91125
[2] AEROSPATIALE,R&D ENGN,MAT LAB,TOULOUSE,FRANCE
来源：
EXPERIMENTAL MECHANICS | 1997年 / 37卷 / 04期
基金：
美国国家航空航天局; 美国国家科学基金会;
关键词：
Number:; CMS9504144; Acronym:; NSF; Sponsor: National Science Foundation; -; N00014-91-J-1427; ONR; Sponsor: Office of Naval Research; NASA; Sponsor: National Aeronautics and Space Administration;
D O I：
10.1007/BF02317310
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Planar digital image correlation has been extended to measure surface deformations of cylindrical specimens without physical contact for high-temperature situations. A single CCD camera acquires the surface image patterns of a section of a specimen in the undeformed and deformed states to determine two-dimensional displacements on a projection plane. Axial, circumferential and shear deformations are determined through curvature transformation on the two-dimensional projection displacement field. The resolution of this technique was determined for a cylinder of 22.23-mm diameter to be 3.5C mu m for the axial displacement, 0.05 percent for the axial and shear strains and 0.08 percent for the circumferential strain when correlation computations are carried out over a field of 5 mm x 5 mm.
引用
收藏
页码：433 / 439
页数：7
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