Stress distribution analysis of composite repair with Carbon Nanotubes reinforced putty for damaged steel pipeline

被引:10
|
作者
Arifin, Hanis Hazirah [1 ]
Zardasti, Libriati [1 ]
Lim, Kar Sing [2 ]
Noor, Norhazilan Md [3 ]
Yahaya, Nordin [1 ]
Mazlan, Ain Naadia [1 ]
Sam, Abdul Rahman Mohd [3 ]
机构
[1] Univ Teknol Malaysia, Fac Engn, Sch Civil Engn, Dept Struct & Mat, Johor Baharu, Malaysia
[2] Univ Malaysia Pahang, Coll Engn, Dept Civil Engn, Kuantan, Pahang, Malaysia
[3] Univ Teknol Malaysia, Sch Civil Engn, Construct Res Ctr, Fac Engn, Johor Baharu, Malaysia
关键词
Load-transfer mechanism; Reinforced putty; Carbon nanotubes; Finite element analysis; Repaired pipeline; Burst failure; BURST STRENGTH; BEHAVIOR; SYSTEM; EPOXY;
D O I
10.1016/j.ijpvp.2021.104537
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Composite pipeline repair systems involving infill material and composite wrapper are a common method of enhancing the integrity of damaged oil and gas pipelines. Composite wrappers can be theoretically optimised by minimising the layers of wrapper whilst reinforcing the infill material; i.e., putty. Integrating nanomaterial into putty to enhance its strength is a novel approach to provide secondary layer protection of damaged pipelines. A finite element model simulating a composite repaired pipe was developed to investigate the influence of reinforced Carbon Nanotubes putty on the system's overall repair performance and behaviour. The result was verified with a previous experimental hydrostatic burst pressure test and industrial standard resulting in less than a 15% error margin. The result shows the damaged artificial pipe segment filled with two different putties, namely Grout A and Grout B, ruptured at 32.22 MPa and 32.93 MPa, respectively. The reinforced putty improved the load-bearing capacity of the repaired pipe by a marginal increment of 2.2%. It demonstrated a better load-transfer and load-sharing mechanism than the common composite repair system. The recorded burst failure of the repaired pipe was less abrupt, thus minimising the sudden rupture of the pipeline by acting as a secondary layer of protection in the event of a composite wrapper failure.
引用
收藏
页数:12
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