施工阶段轴向单纯凹痕管道韧性损伤变化分析
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摘要
机械损伤会造成管道的即刻或者延迟失效,而凹痕是机械损伤的主要表现形式。针对施工阶段造成的轴向单纯凹痕,基于Oyane韧性断裂准则,利用有限元法进行模拟研究。分析凹痕管道在不同凹痕尺寸、管道尺寸和管道内压的情况下,管道韧性损伤程度的变化情况。得到凹痕深度与管道韧性损伤程度的关系,为施工阶段造成轴向单纯凹痕的油气管道的安全设计提供一定的理论指导依据。
Mechanical damage can cause immediate or delayed failure of the pipe. The dent is the main form of mechanical damage. According to the Oyane ductile fracture criterion, the finite element method was used to simulate the axial simple dent caused by the construction stage. Analyzed the change of pipeline ductile damage degree in different pit sizes, pipe sizes and pipe pressures, the relationship between the dents depth and the ductile damage degree is obtained, which provides the theoretical basis for the safe design of the oil and gas pipelines with axial indentation during the construction stage.
Mechanical damage can cause immediate or delayed failure of the pipe. The dent is the main form of mechanical damage. According to the Oyane ductile fracture criterion, the finite element method was used to simulate the axial simple dent caused by the construction stage. Analyzed the change of pipeline ductile damage degree in different pit sizes, pipe sizes and pipe pressures, the relationship between the dents depth and the ductile damage degree is obtained, which provides the theoretical basis for the safe design of the oil and gas pipelines with axial indentation during the construction stage.
引文
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[2] 董保胜,赵新伟,陈宏达,等.西气东输管线第三方损伤预测[J].管道技术与设备,2004(02):15-16.DONG BaoSheng,ZHAO XinWei,CHENG HongDa,et al. Third party damage prediction of west gas east line [J]. Pipeline technology and equipment,2004(02):15-16 (In Chinese) .
[3] The American Society of Mechanical Engineers, Gas transmission and distribution piping systems[S] .ASME B31.8-2003:67.
[4] The American Society of Mechanical Engineers, Gas transmission and distribution piping systems[S] .ASME B31.8-2007:69.
[5] The American Society of Mechanical Engineers, Pipeline transportation systems for liquid hydrocarbons and other liquids[S] . ASME B31.4-2006:59.
[6] Groningen.8th Report of The European Gas Pipeline Incident Data Group[R], EGIG. Gas Pipeline Incidents,2011:12.
[7] Ridha Hambli,Marian Reszka.Fracture criteria identification using an inverse technique method and blanking experiment[J].International Journal of Mechanical Sciences,2002,44(7):1349-1361.
[8] Moriya Oyane.Criteria for ductile fracture and their applications[J].Journal of Mechanical Working Technology,1980(4):65-81.
[9] Alloutia M, Schmitta C, Pluvinagea G,et al.Study of the influence of dent depth on the critical pressure of pipeline[J].Engineering Failure Analysis,2012(21):40-51.