Analysis of Interfacial Bond Strength Effect of Thin-Walled Lined Composite Pipe Under Impact Force
[Purposes]This paper aims to study the effect of interfacial bond strength on the peel buckling of thin-walled lined composite pipe under impact force.[Methods]The nonlinear analysis model of thin-walled lined composite pipe in elastic stage is established.The comparison of modal experiment results with analytical models of thin-walled lined composite pipes is made to verify the reliability of the finite element analysis model.By changing the interfacial bond strength between the lining layer and the origi-nal base pipe wall,the dynamic characteristics of composite pipe under impact force are studied.[Find-ings]The results of research show that when the impact load is small and the pipeline deformation is in the elastic stage,the damage of thin-walled lined composite pipe is mostly concentrated at the interlayer interface.The interfacial bond strength has a great influence on the interlaminar peel buckling,and the increase of interlayer bonding strength,the maximum equivalent stress difference between the outer base pipe and the inner liner decreases.In addition,the deformation coordination ability of the outer base pipe and the lining layer increases with the increase of bond strength,while radial interlayer displace-ment decreases,which improves the integrity and the continuity of the composite pipes.[Conclusions]The research results can provide a reference for the design method and the interlayer interface effect analysis of the thin-walled liner repair pipeline.
thin-walled lined composite pipeinterfacial bond strengthimpact loadinterlayer stripping
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