摘要
依据API 579准则推荐的第三级评价方法(数值模拟方法),借助ANSYS有限元分析软件,对钢级为QT900含腐蚀坑连续油管的剩余强度进行评价,建立了含腐蚀坑连续油管强度评价标准以及含腐蚀坑连续油管在弯曲条件下的强度分析有限元模型,得到了在给定弯曲曲率半径下连续油管的极限腐蚀坑深度。结果显示:在相同弯曲曲率半径下,峰值等效应力及等效塑性应变均随腐蚀坑深度的增加而增加;当弯曲曲率半径为1219.2 mm时,极限腐蚀坑深度0.516 mm,腐蚀坑处的最高等效塑性应变为4.4%,连续油管的剩余强度为653 MPa,此时连续油管可安全工作。
According to API 579 standards recommended by third grade evaluation method （finite element simulation method）, with the aid of finite element analysis software ANSYS, an evaluation of residual strength of coiled tubing with corrosion pit in QT900 grade was carried out. The intensity evaluation standard for coiled tubing with corrosion pit and strength analysis finite element model of coiled tubing with corrosion pit under the condition of bending was established. Then, the limit of the corrosion pit depth of coiled tubing in the context of the given bending curvature radius was obtained. The results show that under the same bending curvature radius, the peak value of equivalent stress and equivalent plastic strain increase with the increase of corrosion pit depth. When bending curvature radius is 1219.2 mm, limit corrosion pit depth is 0.516 ram, the maximum equivalent plastic strain of corrosion pit is 4.4%, the residual strength of coiled tubing is 653 MPa, and the coiled tubing is safe at this time.
出处
《热加工工艺》
CSCD
北大核心
2016年第12期71-73,共3页
Hot Working Technology
基金
陕西省自然科学基础研究计划支持项目(2014JM2-5068)
关键词
连续油管
腐蚀坑
有限元
剩余强度
coiled tube
corrosion pit
finite element
remaining strength
