A predictive Model and Evaluation for Deformation Band in Saturated Sand

摘要：

Many materials exhibit narrow bands of intense plastic deformation, termed deformation bands or shear bands, under extreme leading conditions. Deformation bands often precede failure in high strength material. Numerical prediction for the process of deformation band formation is critically dependent on the constitutive model. In this work, a constitutive framework suitable for the numerical analyses of localization instabilities in saturated sand was presented. Based on the continuous mechanics, nonlinear finite element method, critical state and bifurcation theory, a recently proposed model for saturated sand was enhanced to capture the deformation band in the compressive yield strength commonly observed in geomaterials undergoing plastic deformation. The prediction and evolution of this model were implemented in a finite element program and used to predict the formation of deformation band in plane strain compression. The prediction from the model is shown to be in good condition to demonstrate the formation of the localization and the deformation band, according to the numerical computation of a plane strain sample

关键词： deformation band constitutive model prediction finite elements

作者: HUANG Linchong XU Zhisheng WANG Lichuan

作者单位: School of Civil and Architectural Engineering,Central South University,Changsha 410075,Hunan,China;D School of Civil and Architectural Engineering,Central South University,Changsha 410075,Hunan,China

会议类型: 国际会议

会议名称: The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)

会议地点: 北京

会议语种:英文

页码: 2109-2114

在线出版日期: 2008-09-24（万方平台首次上网日期，不代表论文的发表时间）