Modelling of metal-to-metal seals in a pressure relief valve using advanced FE-analysis

Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)

Abstract

This study investigates the behaviour of the contact faces in the metal-to-metal seal of a typical pressure relief valve. The valve geometry is simplified to an axisymmetric problem. A cylindrical nozzle, which has a valve seat on top, contacts with a disk, which is preloaded by a compressed linear spring. All the components are made of the steel AISI type 316N(L) defined using the multilinear kinematic hardening material model based on monotonic and cyclic tests at 20◦C. Analysis considerations include the effects of the Fluid Pressure Penetration (FPP) across the valve seat which exists at two different scales. There is certain limited fluid leakage through the valve seat at operational pressures, which is caused by the fluid penetrating into surface asperities at the microscale. At the macroscale, non-linear FE analysis using the FPP technique available in ANSYS revealed that there is also a limited amount of fluid penetrating into gap. Accurate prediction of the fluid pressure profile over the valve seat is addressed in this study by considering the FPP interaction on both scales. The shape of this pressure profile introduces an additional component of the spring force, which needs to be considered to provide a reliable sealing. The analysis showed that the evolution of the profile, which is caused by the isotropic softening of the material, is significant during the cyclic operation of the valve.
LanguageEnglish
Title of host publicationSurface Effects and Contact Mechanics including Tribology XII
Subtitle of host publicationProceedings of Contact and Surface 2015 Conference
EditorsJ.Th.M. de Hosson, M. Hadfield, C.A. Brebbia
Place of PublicationSouthampton
Pages247-258
Number of pages12
Volume91
DOIs
Publication statusPublished - 21 Apr 2015
EventContact and Surface 2015 - Valencia, Spain
Duration: 21 Apr 201523 Apr 2015

Publication series

NameWIT Transactions on Engineering Sciences
PublisherWIT Press
No.XII
Volume91

Conference

ConferenceContact and Surface 2015
CountrySpain
CityValencia
Period21/04/1523/04/15

Fingerprint

Pressure relief valves
Seals
Metals
Fluid
Fluids
Modeling
Penetration
Contact
Steel
Leakage (fluid)
Softening
ANSYS
Nonlinear analysis
Nozzle
Hardening
Nonlinear Analysis
Leakage
Monotonic
Nozzles
Kinematics

Keywords

  • contact
  • finite element analysis
  • metal-to-metal seal
  • plasticity
  • pressue penetration
  • safety valve
  • type 316 steel

Cite this

Gorash, Y., Dempster, W., Nicholls, W., & Hamilton, R. (2015). Modelling of metal-to-metal seals in a pressure relief valve using advanced FE-analysis. In J. T. M. de Hosson, M. Hadfield, & C. A. Brebbia (Eds.), Surface Effects and Contact Mechanics including Tribology XII: Proceedings of Contact and Surface 2015 Conference (Vol. 91, pp. 247-258). (WIT Transactions on Engineering Sciences; Vol. 91, No. XII). Southampton. https://doi.org/10.2495/SECM150221
Gorash, Yevgen ; Dempster, William ; Nicholls, William ; Hamilton, Robert. / Modelling of metal-to-metal seals in a pressure relief valve using advanced FE-analysis. Surface Effects and Contact Mechanics including Tribology XII: Proceedings of Contact and Surface 2015 Conference. editor / J.Th.M. de Hosson ; M. Hadfield ; C.A. Brebbia. Vol. 91 Southampton, 2015. pp. 247-258 (WIT Transactions on Engineering Sciences; XII).
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abstract = "This study investigates the behaviour of the contact faces in the metal-to-metal seal of a typical pressure relief valve. The valve geometry is simplified to an axisymmetric problem. A cylindrical nozzle, which has a valve seat on top, contacts with a disk, which is preloaded by a compressed linear spring. All the components are made of the steel AISI type 316N(L) defined using the multilinear kinematic hardening material model based on monotonic and cyclic tests at 20◦C. Analysis considerations include the effects of the Fluid Pressure Penetration (FPP) across the valve seat which exists at two different scales. There is certain limited fluid leakage through the valve seat at operational pressures, which is caused by the fluid penetrating into surface asperities at the microscale. At the macroscale, non-linear FE analysis using the FPP technique available in ANSYS revealed that there is also a limited amount of fluid penetrating into gap. Accurate prediction of the fluid pressure profile over the valve seat is addressed in this study by considering the FPP interaction on both scales. The shape of this pressure profile introduces an additional component of the spring force, which needs to be considered to provide a reliable sealing. The analysis showed that the evolution of the profile, which is caused by the isotropic softening of the material, is significant during the cyclic operation of the valve.",
keywords = "contact, finite element analysis, metal-to-metal seal, plasticity, pressue penetration, safety valve, type 316 steel",
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Gorash, Y, Dempster, W, Nicholls, W & Hamilton, R 2015, Modelling of metal-to-metal seals in a pressure relief valve using advanced FE-analysis. in JTM de Hosson, M Hadfield & CA Brebbia (eds), Surface Effects and Contact Mechanics including Tribology XII: Proceedings of Contact and Surface 2015 Conference. vol. 91, WIT Transactions on Engineering Sciences, no. XII, vol. 91, Southampton, pp. 247-258, Contact and Surface 2015, Valencia, Spain, 21/04/15. https://doi.org/10.2495/SECM150221

Modelling of metal-to-metal seals in a pressure relief valve using advanced FE-analysis. / Gorash, Yevgen; Dempster, William; Nicholls, William; Hamilton, Robert.

Surface Effects and Contact Mechanics including Tribology XII: Proceedings of Contact and Surface 2015 Conference. ed. / J.Th.M. de Hosson; M. Hadfield; C.A. Brebbia. Vol. 91 Southampton, 2015. p. 247-258 (WIT Transactions on Engineering Sciences; Vol. 91, No. XII).

Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)

TY - CHAP

T1 - Modelling of metal-to-metal seals in a pressure relief valve using advanced FE-analysis

AU - Gorash, Yevgen

AU - Dempster, William

AU - Nicholls, William

AU - Hamilton, Robert

PY - 2015/4/21

Y1 - 2015/4/21

N2 - This study investigates the behaviour of the contact faces in the metal-to-metal seal of a typical pressure relief valve. The valve geometry is simplified to an axisymmetric problem. A cylindrical nozzle, which has a valve seat on top, contacts with a disk, which is preloaded by a compressed linear spring. All the components are made of the steel AISI type 316N(L) defined using the multilinear kinematic hardening material model based on monotonic and cyclic tests at 20◦C. Analysis considerations include the effects of the Fluid Pressure Penetration (FPP) across the valve seat which exists at two different scales. There is certain limited fluid leakage through the valve seat at operational pressures, which is caused by the fluid penetrating into surface asperities at the microscale. At the macroscale, non-linear FE analysis using the FPP technique available in ANSYS revealed that there is also a limited amount of fluid penetrating into gap. Accurate prediction of the fluid pressure profile over the valve seat is addressed in this study by considering the FPP interaction on both scales. The shape of this pressure profile introduces an additional component of the spring force, which needs to be considered to provide a reliable sealing. The analysis showed that the evolution of the profile, which is caused by the isotropic softening of the material, is significant during the cyclic operation of the valve.

AB - This study investigates the behaviour of the contact faces in the metal-to-metal seal of a typical pressure relief valve. The valve geometry is simplified to an axisymmetric problem. A cylindrical nozzle, which has a valve seat on top, contacts with a disk, which is preloaded by a compressed linear spring. All the components are made of the steel AISI type 316N(L) defined using the multilinear kinematic hardening material model based on monotonic and cyclic tests at 20◦C. Analysis considerations include the effects of the Fluid Pressure Penetration (FPP) across the valve seat which exists at two different scales. There is certain limited fluid leakage through the valve seat at operational pressures, which is caused by the fluid penetrating into surface asperities at the microscale. At the macroscale, non-linear FE analysis using the FPP technique available in ANSYS revealed that there is also a limited amount of fluid penetrating into gap. Accurate prediction of the fluid pressure profile over the valve seat is addressed in this study by considering the FPP interaction on both scales. The shape of this pressure profile introduces an additional component of the spring force, which needs to be considered to provide a reliable sealing. The analysis showed that the evolution of the profile, which is caused by the isotropic softening of the material, is significant during the cyclic operation of the valve.

KW - contact

KW - finite element analysis

KW - metal-to-metal seal

KW - plasticity

KW - pressue penetration

KW - safety valve

KW - type 316 steel

UR - http://www.witpress.com/elibrary/wit-transactions-on-engineering-sciences/91/33214

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DO - 10.2495/SECM150221

M3 - Chapter (peer-reviewed)

SN - 978-1-84564-950-0

VL - 91

T3 - WIT Transactions on Engineering Sciences

SP - 247

EP - 258

BT - Surface Effects and Contact Mechanics including Tribology XII

A2 - de Hosson, J.Th.M.

A2 - Hadfield, M.

A2 - Brebbia, C.A.

CY - Southampton

ER -

Gorash Y, Dempster W, Nicholls W, Hamilton R. Modelling of metal-to-metal seals in a pressure relief valve using advanced FE-analysis. In de Hosson JTM, Hadfield M, Brebbia CA, editors, Surface Effects and Contact Mechanics including Tribology XII: Proceedings of Contact and Surface 2015 Conference. Vol. 91. Southampton. 2015. p. 247-258. (WIT Transactions on Engineering Sciences; XII). https://doi.org/10.2495/SECM150221