Hybrid composite tensile armour wires in flexible risers: A multi-scale model

Gautam, Mayank; Katnam, K.B.; Potluri, Prasad; Jha, Vivekanand; Latto, James; Dodds, N.

doi:10.1016/j.compstruct.2016.11.090

Cited by 10 publications

(6 citation statements)

References 29 publications

(40 reference statements)

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“…The increase in stress value observed in the MBOF is due to the presence of glass fibre tows which have a high strength (1663 ± 230 MPa). However, as a result of braid angle (Atas et al, 2017; Gautam et al, 2016, 2017, 2015; Pavlopoulou et al, 2017) and due to the presence of crimp (due to interlacement), the overall contribution of glass tows towards the tensile strength gets reduced.…”

Section: Resultsmentioning

confidence: 99%

Optimisation of optical fibre using micro-braiding for structural health monitoring

Rufai

Gautam

Potluri

et al. 2018

Journal of Intelligent Material Systems and Structures

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Structural health monitoring is a fast growing area used to assess the state of various structures such as aircraft, building, bridge, wind turbine, pipe, automobile through appropriate data processing and interpretation. This article presents a novel technique of optimising the conventional optical fibres used for structural health monitoring, in order to improve their mechanical properties, and handling during the manufacturing process by micro-braiding the optical fibres. This study investigates and compares the tensile properties of the both micro-braided optical fibre and conventional optical fibres through uniaxial tensile tests. Experimental results show 85% improvement in strain at failure for the micro-braided optical fibre when compared to the optical fibres. Moreover, interfacial shear strength comparison, of the braiding yarn, between optical fibres and micro-braided optical fibre (carried out through micro-bond test) has also been conducted. In addition, the effect of embedding both micro-braided and conventional optical fibre in composite was also investigated by three-point bend test. Overall, the mechanical performance of the composite was not affected by the presence of micro-braided optical fibre. This article will also discuss the process and the advantage of micro-braided optical fibre for structural health monitoring.

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Section: Resultsmentioning

confidence: 99%

Optimisation of optical fibre using micro-braiding for structural health monitoring

Rufai

Gautam

Potluri

et al. 2018

Journal of Intelligent Material Systems and Structures

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“…Hybrid composites improve composite functionality by allowing the designer to add selectivity, including stiffer, more-expensive fibres where stresses are more critical and less-expensive fibres where stresses are less critical [3,102,117,255]. As water depths have increased and service conditions have become more demanding, manufacturers of nonbonded flexible pipes are attempting to build pipe cross-sections incorporating carbon fibre parts to solve these concerns [342][343][344][345][346][347][348][349][350]. Carbon fibre's most notable application has been in the substitution of heavy and expensive steel parts in nonbonded flexible riser pipes [5,22,119,215].…”

Section: Fatigue Behaviourmentioning

confidence: 99%

Review of Composite Marine Risers for Deep-Water Applications: Design, Development and Mechanics

et al. 2022

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In recent times, the utilisation of marine composites in tubular structures has grown in popularity. These applications include composite risers and related SURF (subsea umbilicals, risers and flowlines) units. The composite industry has evolved in the development of advanced composites, such as thermoplastic composite pipes (TCP) and hybrid composite structures. However, there are gaps in the understanding of its performance in composite risers, hence the need for this review on the design, hydrodynamics and mechanics of composite risers. The review covers both the structure of the composite production riser (CPR) and its end-fittings for offshore marine applications. It also reviews the mechanical behaviour of composite risers, their microstructure and strength/stress profiles. In principle, designers now have a greater grasp of composite materials. It was concluded that composites differ from standard materials such as steel. Basically, composites have weight savings and a comparative stiffness-to-strength ratio, which are advantageous in marine composites. Also, the offshore sector has grown in response to newer innovations in composite structures such as composite risers, thereby providing new cost-effective techniques. This comprehensive review shows the necessity of optimising existing designs of composite risers. Conclusions drawn portray issues facing composite riser research. Recommendations were made to encourage composite riser developments, including elaboration of necessary standards and specifications.

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“…Gautam et al. [10] have investigated the composite tubular braid model with variable braid texture angles on the parallel fibers.…”

Section: Introductionmentioning

confidence: 99%

Analysis of longitudinal and innovative transversal 3D printed lattice tubular braid textures subjected to internal compression as reinforcement

Rahiminia¹,

Latifi²,

Sadighi³

2020

Journal of Industrial Textiles

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The longitudinal tubular braid texture (maypole braid) is an important texture in industrial textiles with extensive applications for composites reinforcement as a continuous form in a continuous process. This texture has a high strength in the longitudinal direction, while it is weak in its circumferential direction. The present work is to introduce an innovative structure named transversal tubular braid texture, whose structure is formed by the combination of braid and Leno technique in order to eliminate the weakness of longitudinal tubular braid texture and subsequently resist to the internal compression in its composite. Considering the complex production process of the introduced texture, prior to design a machine for its production, the structures of longitudinal and transversal tubular braid texture samples were produced as longitudinal and transversal lattice tubular braid textures using a 3D printer with the fused deposition modeling method in order to analyze and compare their mechanical properties. The required textures were primarily simulated by Rhino Ceros software and their lattice model data were transferred to the 3D printer. The produced tubular lattice samples were assessed by the standard Split Disk Mechanical Test for obtaining their hoop stresses. The hoop modulus of elasticity in transversal lattice tubular braid texture was approximately 120 times the longitudinal lattice tubular braid texture specimens. This suggests the proper design of this structure and resolves the weakness of longitudinal lattice tubular braid textures. The theoretical analysis of longitudinal and transversal lattice tubular braid textures was done by ANSYS software employing the data from the simulation software. The experimental results adequately correlated with the output results from the finite element analysis of the structures. This research work ensured that the mechanical strength of the introduced texture is desired to be produced continuously by a specially designed machine and used to reinforce tubular composites in an industrial continual process as the further work to be applied for high pressure fluids flows.

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Hybrid composite tensile armour wires in flexible risers: A multi-scale model

Cited by 10 publications

References 29 publications

Optimisation of optical fibre using micro-braiding for structural health monitoring

Optimisation of optical fibre using micro-braiding for structural health monitoring

Review of Composite Marine Risers for Deep-Water Applications: Design, Development and Mechanics

Analysis of longitudinal and innovative transversal 3D printed lattice tubular braid textures subjected to internal compression as reinforcement

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