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http://dx.doi.org/10.7843/kgs.2008.24.7.25

Restrained Effect of End Plate on Plane Strain Test Evaluated by Digital Image Correlation Method  

Jang, Eui-Ryong (Dept. of Civil, Urban & Geosystem Engineering, Seoul National Univ.)
Choo, Yoon-Sik (Dept. of Civil, Urban & Geosystem Engineering, Seoul National Univ.)
Lee, Won-Taeg (Dept. of Civil Engineering, Honam Univ.)
Chung, Choong-Ki (Dept. of Civil, Urban & Geosystem Engineering, Seoul National Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.24, no.7, 2008 , pp. 25-36 More about this Journal
Abstract
The plane strain test can reproduce the real field condition and failure behavior precisely over other laboratory shear tests. Accordingly, this test has been utilized to investigate the shearing behaviors associated with overall failure behavior and local deformation of soils. However, most plane strain tests have been carried out with restrained end plates due to difficulties in manufacturing the equipment and also performing it. This restraint induces different results with real field because of shear stress on end plates. In this study, plane strain tests with/without bottom plate restraint were performed on Jumunjin-sand. The measurement of overall and local deformation was accomplished by digital image correlation technique as well as external LVDT. By applying digital image correlation method using two consecutive images captured through the transparent wall, local deformation behavior of various parts inside the specimen was estimated. And the formation and development of shear band caused by the restrained effect of end plate and the deformation mechanism of sand under plane strain condition were examined.
Keywords
Digital Image Correlation (DIC); End plate; Plane strain; Restrained effect; Shear band; Strain localization;
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