The results show that the residual stress in casing pipe mainly influences on the compressive strength.
运用弹性力学理论,建立石油套管的力学模型,通过有限元计算,得到残余应力与石油套管抗压溃强度之间的关系。
A new formula of radial crushing strength of composite pipe is presented, which includes both the geometry sizes and the properties of the materials.
将“钢筋砼梁”的分析原理应用于陶瓷内衬复合钢管的分析，得到的复合钢管径向压溃强度的计算公式不仅体现了材料几何尺寸的效应，而且反映出材料性能的影响：进一步分析表明，陶瓷衬层的弹性模量越高，复合钢管径向压溃强度就越高，这为材料结构设计提供了有价值的参考。
Accurate Simulation on Collapse History of Thin-walled Beam with Closed-hat Section;
闭口帽型薄壁梁压溃历程的精确仿真
The destroyed process of this rigid resistance structure is from buckling to collapse.
这种刚性抗力件的破坏过程包括从屈曲破坏到压溃的过程。
Considering the requirements of riser strength,system collapse,propagated buckling and limitation of floating,the smallest thickness that meets the requirements is determined.
综合考虑规范对立管强度的要求,防止发生压溃和屈曲扩展的要求及限制立管发生漂浮的要求三个条件,确定了满足条件的最小壁厚。