AXIAL TENSILE STRENGTH ANALYSIS OF UNBONDED FLEXIBLE PIPE CONTAINING COMPOSITE TENSILE ARMORS

MA JinSheng; DU FaXi; LUO Dan

doi:10.16579/j.issn.1001.9669.2020.06.024

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AXIAL TENSILE STRENGTH ANALYSIS OF UNBONDED FLEXIBLE PIPE CONTAINING COMPOSITE TENSILE ARMORS

更新时间：2022-09-22

- AXIAL TENSILE STRENGTH ANALYSIS OF UNBONDED FLEXIBLE PIPE CONTAINING COMPOSITE TENSILE ARMORS
- Journal of Mechanical Strength Vol. 42, Issue 6, Pages: 1438-1444(2020)
- 作者机构：
  
  1. 航空工业成都飞机工业(集团)有限责任公司技术中心
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2020.06.024
  CLC：
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MA JinSheng, DU FaXi, LUO Dan. AXIAL TENSILE STRENGTH ANALYSIS OF UNBONDED FLEXIBLE PIPE CONTAINING COMPOSITE TENSILE ARMORS. [J]. 42(6):1438-1444(2020)
DOI：

MA JinSheng, DU FaXi, LUO Dan. AXIAL TENSILE STRENGTH ANALYSIS OF UNBONDED FLEXIBLE PIPE CONTAINING COMPOSITE TENSILE ARMORS. [J]. 42(6):1438-1444(2020) DOI： 10.16579/j.issn.1001.9669.2020.06.024.

摘要

以复合材料替换非粘结柔性立管的抗拉铠装层的钢材条带是实现超深水油气开发对管道轻量化、高强度要求的有效途径。采用细观力学分析方法获得了复合材料条带的各向异性材料参数,基于厚壁圆筒理论与弯曲梁微分方程,结合循环迭代算法建立了含复合材料铠装层的非粘结柔性立管在轴对称载荷作用下结构响应计算模型。基于钢的双线性本构、复合材料等强度分析方法得到了不同材料非粘结柔性立管的失效分析模型。算例结果显示,复合材料铠装层能有效提升立管的抗拉强度,纤维的体积分数、弹性模量和强度,是影响复合材料非粘结柔性立管刚度、抗拉强度的重要参数。

Abstract

As offshore oil industry moves into ultra-deep water,replacing the steel tensile armors of unbonded flexible pipe with composite is becoming a scheme that can effectively reduce weight and provide better mechanical properties.The anisotropic parameters of composite are obtained by meso-mechanical method,then a model of axisymmetric structure response for composite flexible pipe with composite armored layer is established,which is based on both thick-wall cylinder theory and the differential equation of curved beam,and also the algorithm of cyclic iterative is combined.Failure models of different type of flexible pipes are obtained,and iso-strength method is used for composite armored pipe.A case study shows that composite armors can effectively enhance the tensile strength of unbonded flexible pipe while effectively reduce the overall weight.Results state that volume fraction,elastic modulus and strength of fiber are the important parameters which affect the axial stiffness and tensile strength of unbonded flexible pipe.

关键词

非粘结柔性立管复合材料铠装层抗拉强度

Keywords

Unbonded flexible pipeComposite armorTensile strength

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