Impact of lens distortions on strain measurements obtained with 2D digital image correlation

被引：58

作者：

Lava, P. ^{[1
]}

Van Paepegem, W. ^{[2
]}

Coppieters, S. ^{[1
]}

De Baere, I. ^{[2
]}

Wang, Y. ^{[3
]}

Debruyne, D. ^{[1
,3
]}

机构：

[1] Catholic Univ Coll Ghent, Assoc KU Leuven, Dept Mech Engn, B-9000 Ghent, Belgium

[2] Univ Ghent, Dept Mat Sci & Engn, B-9052 Ghent, Belgium

[3] Katholieke Univ Leuven, Dept MTM, B-3001 Heverlee, Belgium

来源：

OPTICS AND LASERS IN ENGINEERING | 2013年 / 51卷 / 05期

关键词：

Digital image correlation; Lens distortions; High strain gradients; Composite materials; SATIN WEAVE COMPOSITE; TENSION PART II; LOCAL STRAIN; CALIBRATION; MOTION; MICROSCOPE; CAMERAS; DAMAGE;

D O I：

10.1016/j.optlaseng.2012.12.009

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The determination of strain fields based on displacements obtained via digital image correlation (DIC) at the micro-strain level (<= 1000 mu m/m) is still a cumbersome task. In particular when high-strain gradients are involved, e.g. in composite materials with multidirectional fibre reinforcement, uncertainties in the experimental setup and errors in the derivation of the displacement fields can substantially hamper the strain identification process. In this contribution, the aim is to investigate the impact of lens distortions on strain measurements. To this purpose, we first perform pure rigid body motion experiments, revealing the importance of precise correction of lens distortions. Next, a uni-axial tensile test on a textile composite with spatially varying high strain gradients is performed, resulting in very accurately determined strains along the fibers of the material. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：576 / 584

页数：9

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