摘要
研究冻土在冲击加载下的动态力学行为对寒区的工程建设、交通运输等都有着重大的意义。该研究在粘弹性模型的基础上,考虑了损伤和温度的影响,建立了能够合理描述冻土在单轴冲击荷载作用下的应力-应变行为的本构模型。并进行了冻土霍普金森压杆冲击动态实验,对比实验曲线和所建立的本构模型曲线,发现拟合良好,具有一定的工程应用价值。
It is very important to study the dynamic behaviors of frozen soil under impact loading for the construction and transportation in cold regions. With the effects of damage and temperature considered, a dynamic constitutive model for frozen soil was built on the basis of viscoelastic theory to describe its stress-strain behavior under uniaxial impact loading, and a separate Hopkinson pressure bar made of frozen soil was tested. Comparison between the theoretical results and the dynamic experimental data show that, the proposed dynamic constitutive model gives predictions in good agreement with the experimental curves, which is valuable in engineering application.
出处
《应用数学和力学》
CSCD
北大核心
2014年第S1期304-308,共5页
Applied Mathematics and Mechanics
基金
国家自然科学基金(11172251)
冻土工程国家重点实验室开放基金(SKLFSE201001)
爆炸科学与技术国家重点实验室(北京理工大学)开放课题(KFJJ13-10M)
四川省青年科技创新团队(2013TD0004)~~
关键词
冻土
损伤
本构模型
SHPB
冲击
frozen soil
damage
constitutive model
SHPB
impact