Nonlinear Constitutive Equation for Green Sand Considering the Tri-axial Compression Behavior  

作　　者：曾攀 孔劲 

机构地区：[1]Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

出　　处：《Tsinghua Science and Technology》2004年第5期560-564,共5页清华大学学报（自然科学版（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No. 10172054)

摘　　要：The compression characteristics of green sand were investigated experimentally, including the squeezing and yielding during deformation. An expression was developed for the transient compression modulus of sand during compression. Based on the hypothesis put forward of the compression state, the differential equation for the nonlinear constitutive equation was deduced by introducing a move-yield poten- tial function. The state constitutive equation under the tri-axial experiment is further studied according to the sand attributes, considering the differential form of Hooke’s law and the Mohr-Coulomb condition. The re- lated experiment data are applied to verify the proposed constitutive model of sand.The compression characteristics of green sand were investigated experimentally, including the squeezing and yielding during deformation. An expression was developed for the transient compression modulus of sand during compression. Based on the hypothesis put forward of the compression state, the differential equation for the nonlinear constitutive equation was deduced by introducing a move-yield poten- tial function. The state constitutive equation under the tri-axial experiment is further studied according to the sand attributes, considering the differential form of Hooke’s law and the Mohr-Coulomb condition. The re- lated experiment data are applied to verify the proposed constitutive model of sand.

关 键 词：green sand tri-axial experiment constitutive equation 

分 类 号：TH45[机械工程—机械制造及自动化]