Extended three-dimensional digital image correlation (X3D-DIC)

被引：61
|
作者：
Rethore, Julien [1 ]
Tinnes, Jean-Philippe [2 ]
Roux, Stephane [1 ]
Buffiere, Jean-Yves [2 ]
Hild, Francois [1 ]
机构：
[1] Univ Paris 06, LMT Cachan, ENS, CNRS UMR 8535,PRES UniverSud Paris, F-94235 Cachan, France
[2] Inst Natl Sci Appl, MATEIS, CNRS, UMR 5510, F-69621 Villeurbanne, France
来源：
COMPTES RENDUS MECANIQUE | 2008年 / 336卷 / 08期
关键词：
rupture; discontinuity; photomechanics;
D O I：
10.1016/j.crme.2008.06.006
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A correlation algorithm is proposed to measure full three-dimensional displacement fields in a three-dimensional domain. The chosen kinematic basis for this measurement is based on continuous finite-element shape functions. It is furthermore proposed to account for the presence of strong discontinuities, similarly to extended finite element schemes, with a suited enrichment of the kinematics with discontinuities supported by a (crack) surface. An optimization of the surface geometry is proposed based on correlation residuals. The procedure is applied to analyze one loading cycle of a fatigue-cracked nodular graphite cast iron sample by using computed tomography pictures. Subvoxel crack openings are revealed and measured.
引用
收藏
页码：643 / 649
页数：7
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