Three-dimensional measurement of local strain using digital stereo photogrammetry in the triaxial test

被引：0

作者：

Kikkawa, N. ^{[1
]}

Nakata, Y. ^{[1
]}

Hyodo, M. ^{[1
]}

Murata, H. ^{[1
]}

Nishio, S. ^{[1
]}

机构：

[1] Yamaguchi Univ, Grad Sch, Ube, Yamaguchi 755, Japan

来源：

Geomechanics and Geotechnics of Particulate Media | 2006年

关键词：

D O I：

暂无

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

A measurement method is proposed for three-dimensional local displacement and volume in the triaxial compression test in which stereo photogrammetry is applied to digital images. A drained triaxial compression test was performed on Toyoura sand and the three-dimensional deformation of the surface of a cylindrical specimen was measured using 8 digital still cameras. In addition, the local volumetric strain was computed and was compared to the global volumetric strain which was calculated by the volume of water drained from the specimen. As a result, the volumetric strain in the middle layer of the specimen was shown to be more dilative than the global volumetric strain as the global deviator strain increased, and the volumetric strain in the top and bottom layers of the specimen was more contractive than the global volumetric strain.

引用

页码：61 / 67

页数：7