-
26浏览
-
0点赞
-
0收藏
-
0分享
-
309下载
-
0评论
-
引用
期刊论文
On the interface friction in direct shear test
Computers and Geotechnics 32(2005)317-325,-0001,():
Distinct element simulations for the direct shear box tests on a dense and a loose 2D sample of a mixture of binary diameter cylinders were performed. Special attention is focused on the friction between the internal surface of the shear box and the sample. In the conventional direct shear test, where the up/downward movement of the upper shear box is restrained and the lower shear box moves horizontally, the frictional force that acts on the sample at the internal surface of the upper shear box is downward for the dense sample and upward for the loose sample, causing the real shear strength to be larger for the dense sample and smaller for the loose sample than the one calculated from the externally applied normal force. Two possible improvements for the conventional direct shear test to reduce the frictional force of the shear box are introduced: one is free of the upper shear box vertically by adding the low friction Teflon rods and a platen between the upper shear box and the bearing ring that measures the shear force; the other is to pull the upper shear box with a flexible rope or wire. The distinct element method simulation and the experimental results show that both these two improvements can reduce the influences of the interface frictional force on the shear strengths.
【免责声明】以下全部内容由[孙德安]上传于[2011年04月29日 16时15分57秒],版权归原创者所有。本文仅代表作者本人观点,与本网站无关。本网站对文中陈述、观点判断保持中立,不对所包含内容的准确性、可靠性或完整性提供任何明示或暗示的保证。请读者仅作参考,并请自行承担全部责任。
本学者其他成果
同领域成果