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

页码：643 / 649

页数：7

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