摘要
海冰的弯曲破坏进程的研究已经称为冰工程界的一项重要课题.通过理论分析结合数值计算对海冰弯曲破坏数值模拟方法进行探索:探讨适合于海冰弯曲应力状态下的本构模型和破坏准则;在LS-DYNA中模拟圆环形冰排弯曲破坏和冰排与锥体结构相互作用的进程,提出了一种对海冰破坏准则验证的技术思路;通过所提出的技术思路对基于三轴压缩试验的Derradji破坏准则进行了修正,使其能够适用于海冰的弯曲破坏.
The research on ice bending failure has become a significant subject in the ice engineering.In this paper, the numerical method and theory analysis are combined to seek an efficient method for simulating the ice bending failure process.Discuss the existing constitutive model and failure criterion of sea ice that fit the sea ice in bending stress condition.By using the LS-DYN A code to simulate a ring ice sheet bending failure and ice-cone interaction, propose a general tactical method to modify sea ice bending failure criterion.Use the tactical method proposed above to modify Derradji＇s failure criterion which is based on the triaxial compression tests in order to make the failure criterion fits the ice bending failure process.
出处
《数学的实践与认识》
CSCD
北大核心
2014年第23期115-126,共12页
Mathematics in Practice and Theory
基金
国家自然科学基金(51179123
51279131)
国家自然科学基金创新研究群体科学基金(51021004)
关键词
海冰
弯曲破坏
破坏准则
数值模拟
sea ice
bending failure
failure criterion
numerical simulation
