摘要
研究了J55膨胀管的壁厚误差、椭圆度、残余应力对其抗挤强度的影响。并利用ANSYS有限元对J55膨胀管实际抗挤毁过程进行了仿真模拟,结果表明:壁厚的减小降低抗挤强度,壁厚的增加提高抗挤强度。随着椭圆度的增加,套管抗挤强度不断地减小。轴向残余拉应力使套管的抗挤强度明显降低,径向残余应力对套管抗挤强度的影响基本上呈线性规律。通过理论计算结果和模拟结果的比较,验证了模拟的合理性。
In this article, it studied the effect of J55 expansion casing wall thickness deviation, ovality and residual stress on its collapse-resistance strength. Furthermore, it utilized ANSYS FEM software to simulate the collapse-resistance process. The results showed reducing wall thickness can low collapse-resistance strength, and increasing wall thickness can enhance collapse-resistance strength. With ovality increasing, the collapse-resistance strength reduces continually. The axial residual tensile stress significantly reduces the collapse-resistance strength of expansion casing, and the influence of radial residual stress on collapse-resistance strength is basically linear. Through the comparison of theoretical calculation and simulation results, the rationality of the simulation was verified.
出处
《焊管》
2014年第7期23-26,共4页
Welded Pipe and Tube
基金
中国石油天然气集团公司科技管理部攻关项目
膨胀管新产品技术研究(2011A-4209)
关键词
焊管
膨胀管
有限元法
抗挤强度
残余应力
welded pipe
expansion casing
finite element analysis method（FEM）
collapse-resistance strength
residual stress
