New digital-image correlation method and its application

被引：1

作者：

Xing, DM ^{[1
]}

Li, HQ ^{[1
]}

Wang, Z ^{[1
]}

Tong, JW ^{[1
]}

Wang, SB ^{[1
]}

机构：

[1] Tianjin Univ, Dept Mech, Tianjin 300072, Peoples R China

来源：

THIRD INTERNATIONAL CONFERENCE ON EXPERIMENTAL MECHANICS | 2002年 / 4537卷

关键词：

digital-image correlation; strain field; rotation of rigid body;

D O I：

10.1117/12.468870

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

In this paper, a new digital-image correlation method----twelve variables gradient method is presented. The influence of second derivative terms of displacement is considered, the directional derivatives of correlation coefficient are obtained and variational step-length search is used in this method. Consequently, the truncation error caused by increasing of subset size and vast computation time are avoided. The measurement precision of displacement and strain are less than 0.011 pixels and 100 muepsilon, respectively. Two test experiments and the application show that this is an efficient and accurate method.

引用

页码：378 / 381

页数：4

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