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芳纶纤维复合材料是一种可用于缺陷管道补强修复的新型多维复合材料,现场一般采用多层环向缠绕的方式对管道进行修复。使用ABAQUS软件对缺陷管道在芳纶纤维复合材料补强前后进行仿真分析,并研究修复厚度、内压、缺陷深度对修复效果的影响。结果表明:芳纶纤维复合材料能够修复圆坑和曲面缺陷管道,恢复缺陷管道的承压能力;通过增加芳纶纤维复合材料补强层的厚度,能够降低缺陷管道的环向应力,且随着修复厚度的增加,环向应力减小的趋势变小;当修复管道缺陷处Mises等效应力小于屈服强度时,内压越小,补强效果越好。
Aramid fiber composite is a new type of multi-dimensional composite material that can be used to repair and repair defective pipelines. The site is usually repaired by multi-layer hoop winding method. The ABAQUS software was used to simulate the defect pipeline before and after the aramid fiber composites were reinforced. The effects of repairing thickness, internal pressure and defect depth on the repairing effect were also studied. The results show that aramid fiber composites can repair the defects of circular pit and curved surface and restore the bearing capacity of defective tubes. By increasing the thickness of the aramid fiber reinforced composite layer, the circumferential stress of the defective tube can be reduced, When the Mises equivalent stress of the repaired pipeline defect is less than the yield strength, the smaller the internal pressure is, the better the reinforcement effect will be.