Dynamic constitutive modeling of frozen soil under impact loading  

作　　者：Jianguo Ning Yuexiang He Zhiwu Zhu 

机构地区：[1]State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology [2]Traction Power State Key Laboratory, Southwest Jiaotong University [3]State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy Sciences

出　　处：《Chinese Science Bulletin》2014年第26期3255-3259,共5页

基　　金：supported by the National Natural Science Foundation of China (11172251);the Open Fund of State Key Laboratory of Frozen Soil Engineering (SKLFSE201001);the Open Research Project of State Key Laboratory of Explosion Science and Technology in Beijing Institute of Technology (KFJJ1310M)

摘　　要：In this study, an isotropic hardening constitutive model is presented to study the behavior of frozen soil under impact loading. In plasticity, a modified Drucker–Prager yield function is adopted. Based on the experimental investigations at different strain rates and different temperatures by means of split Hopkinson pressure bar, the Drucker–Prager criterion has been modified with consideration in the effect of strain rate, and the model parameters have been determined. Compared the constitutive model with the experimental results, the predicted tendencies of the model corresponded well to the test curves.In this study, an isotropic hardening constitu- tive model is presented to study the behavior of frozen soil under impact loading. In plasticity, a modified Drucker- Prager yield function is adopted. Based on the experimental investigations at different strain rates and different temperatures by means of split Hopkinson pressure bar, the Drucker-Prager criterion has been modified with consid- eration in the effect of strain rate, and the model parameters have been determined. Compared the constitutive model with the experimental results, the predicted tendencies of the model corresponded well to the test curves.

关 键 词：动态本构模型 冲击载荷 冻土 霍普金森压杆 应变速率 各向同性 屈服函数 模型参数 

分 类 号：O347.3[理学—固体力学]