碳纤维增强环氧树脂复合材料修复N80Q钢管的力学性能  

Mechanical properties of N80Q steel pipe repaired by carbon fiber reinforced epoxy resin composites

作　　者：刘培启[1] 耿发贵 刘岩 古海波 金鑫 韩冰 LIU Peiqi;GENG Fagui;LIU Yan;GU Haibo;JIN Xin;HAN Bing(School of Chemical Engineering,Dalian University of Technology,Dalian 116033,China;Dalian Boiler and Pressure Vessel Inspection&Testing Institute CO.LTD.,Dalian 116012,China)

机构地区：[1]大连理工大学化工学院,大连116033 [2]大连锅炉压力容器检验研究院有限公司,大连116012

出　　处：《复合材料学报》2020年第4期808-815,共8页Acta Materiae Compositae Sinica

基　　金：国家重点研发计划(2017YFC0805603)。

摘　　要：为考察碳纤维增强环氧树脂复合材料对环状腐蚀的N80Q钢管的修复效果,采用数值分析和全尺寸爆破试验对修复后的力学性能进行了研究,分析了缺陷轴向长度、缺陷深度和修复层厚度对修复效果的影响。结果表明:碳纤维增强环氧树脂复合材料对N80Q钢管的修复效果显著,经试验测试, 6 mm深缺陷的N80Q管道由碳纤维增强环氧树脂复合材料修复后爆破压力值提高了0.985倍;缺陷轴向长度对N80Q管道修复后的强度影响较小,随着缺陷轴向长度的增加,管道爆破压力值仅下降了3.5%;而缺陷深度对N80Q管道修复后的强度影响较明显,与无缺陷管道相比, 6 mm深缺陷管道修复后爆破压力值下降了9.9%, 7 mm深缺陷管道修复后爆破压力值下降了20.6%。In order to investigate the repair effect of carbon fiber reinforced epoxy resin composite on the ring-corroded N80 Q steel pipe, the mechanical properties of the repaired steel were studied by numerical analysis and full-scale blasting test. The effects of axial length, depth and repair layer thickness on the repairing effect were analyzed. The results show that the carbon fiber/epoxy composite has a remarkable effect on repairing the N80 Q steel pipe and the bursting pressure value of the 6 mm deep defect pipe is raised by 0.985 times after repaired by the carbon fiber/epoxy composite;the axial length of the defect has little effect on the strength of the N80 Q steel pipe after repaired by the carbon fiber/epoxy, and as the axial length of the defect increases, the pipe burst pressure value only gets reduced by 3.5%;the depth of the defect has an obvious effect on the strength of the N80 Q steel pipe after repair: Compared with the non-defective pipe, the burst pressure value of the 6 mm deep defect pipeline is reduced by 9.9%, and the burst pressure of the 7 mm deep defect pipe is reduced by 20.6%.

关 键 词：复合材料 缺陷修复 N80Q钢管 爆破试验 数值分析 

分 类 号：TB332[一般工业技术—材料科学与工程]