Design and finite element analysis of metal-elastomer lined composite over wrapped spherical pressure vessel

Pramod, R.; Krishnadasan, C. K.; Shanmugam, N. Siva

doi:10.1016/j.compstruct.2019.111028

Cited by 11 publications

(4 citation statements)

References 20 publications

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“…Due to the high manufacturing cost and equipment investment required for an aluminum alloy seamless hydrogen storage pressure vessel, the metal inner liner must be thick enough to ensure proper forming quality. Using the plug welding technique, R. Pramod [9] achieved effective continuity between the metal head and the barrel. Moreover, the sealing joints are used in fillet welding technology to prevent gas leakage.…”

Section: Introductionmentioning

confidence: 99%

Research on the Sealing Mechanism of Split-Liner High-Pressure Hydrogen Storage Cylinders

Tong,

Zhu,

Liu

et al. 2024

Processes

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Hydrogen storage is a crucial factor that limits the development of hydrogen energy. This paper proposes using a split liner for the inner structure of a hydrogen storage cylinder. A self-tightening seal is employed to address the sealing problem between the head and the barrel. The feasibility of this structure is demonstrated through hydraulic pressure experiments. The influence laws of the O-ring compression rate, the distance from the straight edge section of the head to the sealing groove, and the thickness of the head on the sealing performance of gas cylinders in this sealing structure are revealed using finite elements analysis. The results show that when the gas cylinder is subjected to medium internal pressure, the maximum contact stress on the O-ring extrusion deformation sealing surface is greater than the medium pressure. There is sufficient contact width, that is, the arc length of the part where the stress on the O-ring contact surface is greater than the medium pressure, so that it can form a good sealing condition. At the same time, increasing the compression ratio of the O-ring and the head’s thickness will help improve the sealing performance, and reducing the distance from the straight edge section of the head to the sealing groove will also improve the sealing performance.

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Section: Introductionmentioning

confidence: 99%

Research on the Sealing Mechanism of Split-Liner High-Pressure Hydrogen Storage Cylinders

Tong,

Zhu,

Liu

et al. 2024

Processes

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“…Primarily the inner tank was manufactured with AA6061-T6 and endorsing its future applications in space programs. 9 Pramod et al 10,11 carried out finite-element (FE) analysis to investigate the pressure vessel behavior during pressurization and depressurization cycles. The study incorporated a two-dimensional (2D) axisymmetric non-linear static analysis and threedimensional (3D) shell models for dynamic response focusing on both AA6061-T6 liner and composite overwrap.…”

Section: Introductionmentioning

confidence: 99%

Design and development of aluminum alloy 6061-T6 pressure vessel liner for aerospace applications: A technical brief

Pramod

Shanmugam

Krishnadasan

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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This work mainly focuses on designing a novel aluminum alloy 6061-T6 pressure vessel liner intended for use in launch vehicles. Fabrication of custom-made welding fixtures for the assembly of liner parts, namely two hemispherical domes and end boss, is illustrated. The parts of the liner are joined using the cold metal transfer welding process, and the welding trials are performed to arrive at an optimized parametric range. The metallurgical characterization of weld joint reveals the existence of dendritic structures (equiaxed and columnar). Microhardness of base and weld metal was 70 and 65 HV, respectively. The tensile strength of base and weld metal was 290 and 197 MPa, respectively, yielding a joint efficiency of 68%. Finite-element analysis of a uniaxial tensile test was performed to predict the tensile strength and location of the fracture in base and weld metal. The experimental and predicted tensile test results were found to be in good agreement.

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“…1 AA6061-T6 is a commonly used material for the fabrication of pressure vessel liners in aerospace industry. 2 This alloy has excellent machinability, formability, good strength and corrosion resistance properties. However, the liner configuration requires the use of welding for assembling a set of hemispherical dome.…”

Section: Introductionmentioning

confidence: 99%

“…However, the liner configuration requires the use of welding for assembling a set of hemispherical dome. 2 Particularly for the aerospace industry, achieving a defect-free weld in thin-walled aluminium pressure vessels is challenging. 3 Due to the higher thermal conductivity, wide heat affected zone (HAZ) is observed in the fusion welds.…”

Section: Introductionmentioning

confidence: 99%

Studies on cold metal transfer welding of aluminium alloy 6061-T6 using ER 4043

Pramod

Shanmugam

Krishnadasan

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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Aluminium alloy 6061-T6 is utilized in aerospace industry for developing pressure vessel liner. Cold metal transfer is a promising welding process used in fabricating aluminium structures. The present work is focussed to achieve an optimum welding parameter for joining a 3.5-mm thick pressure vessel and to examine the mechanical properties and metallurgical nature of the weldment. The welded joint was evaluated as defect free using radiography test. The joint efficiency (66.61%) and measured microhardness of weldment (59.78 HV) exhibited promising results. The effect of grain coarsening in the heat affected zone (HAZ) and weld zone is attributed to the thermal gradients during welding. Dissipation of small amounts of strengthening elements Si and Mg during welding leads to reduction in mechanical properties. X-ray diffraction peaks revealed the presence of intermetallic Al–Si and Fe–Si in the weld zone. Fractography examination confirms the ductile type of failure in the fractured surface of the tensile samples.

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Design and finite element analysis of metal-elastomer lined composite over wrapped spherical pressure vessel

Cited by 11 publications

References 20 publications

Research on the Sealing Mechanism of Split-Liner High-Pressure Hydrogen Storage Cylinders

Research on the Sealing Mechanism of Split-Liner High-Pressure Hydrogen Storage Cylinders

Design and development of aluminum alloy 6061-T6 pressure vessel liner for aerospace applications: A technical brief

Studies on cold metal transfer welding of aluminium alloy 6061-T6 using ER 4043

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