摘要
采用弹塑性有限元方法,分析并验证了内压下无缺陷等径三通的塑性极限载荷,同时针对含局部减薄等径三通,系统地分析了局部减薄的尺寸、位置等因素对等径三通的塑性极限载荷的影响,得到了局部减薄对等径三通塑性极限载荷的影响规律,并分析了几种含局部减薄等径三通塑性破坏的典型失效模式。研究结果可为含局部减薄等径三通结构设计和安全评定提供理论依据和数值参考。
In this paper, the elasto-plastic FEM is used to evaluate limit loads for equal-diameter piping branch junctions with local wall-thinning under internal pressure. Numerical examples of non-defective equal-diameter piping branch junctions show that the computed results are in good agreement with available experimental data. The size effects and the influence of local wall-thinning positions on the plastic limit loads of equal-diameter piping branch junctions are investigated. Some typical failure modes of equal-diameter piping branch junctions with local wall-thinning are studied. The obtained results may provide theoretical bases and numerical references for structural design and safety assessment of equal-diameter piping branch junctions with local wall-thinning.
出处
《工程力学》
EI
CSCD
北大核心
2005年第5期218-224,共7页
Engineering Mechanics
基金
国家自然科学基金资助项目(19902007)
全国优秀博士论文专项基金(200025)
国家"十五"重点科技攻关子课题(2001BA803B03-05)
关键词
极限分析
弹塑性有限元法
等径三通
局部减薄
失效模式
limit analysis
elasto-plasticity FEM
equal-diameter piping branch junctions
local wall-thinning
failure mode
