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Thermo-mechanical analysis of solid interfaces in HVAC cable joints

Thermo-mechanical analysis of solid interfaces in HVAC cable joints
Thermo-mechanical analysis of solid interfaces in HVAC cable joints
Mechanical stresses affect the electrical performance of solid-solid interfaces in highvoltage cable joints. This paper assesses the influence of insulation material mechanical properties and temperature on interface pressure. Based on a hyper-elastic model, the mechanical stresses inside silicone rubber joint tube were determined. Circumferential stresses can reach 50% of the silicone rubber tensile strength at normal pre-operation expansion ratios. An analytical method to determine the thermally induced mechanical stress during operation is presented and its accuracy is confirmed using finite element method. This method is modified to account for the variation of the mechanical properties with temperature. This paper shows that circumferential stresses at the interface increase as temperature drops, which may have a significant impact on the
electrical performance of the interface during operation.
1070-9878
1779-1787
Hamdan, Mohammad, Anan
639f4b40-1f39-487d-9d46-9b4e38208dd4
Pilgrim, James
4b4f7933-1cd8-474f-bf69-39cefc376ab7
Lewin, Paul
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Hamdan, Mohammad, Anan
639f4b40-1f39-487d-9d46-9b4e38208dd4
Pilgrim, James
4b4f7933-1cd8-474f-bf69-39cefc376ab7
Lewin, Paul
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e

Hamdan, Mohammad, Anan, Pilgrim, James and Lewin, Paul (2019) Thermo-mechanical analysis of solid interfaces in HVAC cable joints. IEEE Transactions on Dielectrics & Electrical Insulation, 26 (6), 1779-1787. (doi:10.1109/TDEI.2019.008152).

Record type: Article

Abstract

Mechanical stresses affect the electrical performance of solid-solid interfaces in highvoltage cable joints. This paper assesses the influence of insulation material mechanical properties and temperature on interface pressure. Based on a hyper-elastic model, the mechanical stresses inside silicone rubber joint tube were determined. Circumferential stresses can reach 50% of the silicone rubber tensile strength at normal pre-operation expansion ratios. An analytical method to determine the thermally induced mechanical stress during operation is presented and its accuracy is confirmed using finite element method. This method is modified to account for the variation of the mechanical properties with temperature. This paper shows that circumferential stresses at the interface increase as temperature drops, which may have a significant impact on the
electrical performance of the interface during operation.

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More information

Accepted/In Press date: 26 June 2019
e-pub ahead of print date: 4 December 2019
Published date: December 2019

Identifiers

Local EPrints ID: 432899
URI: http://eprints.soton.ac.uk/id/eprint/432899
ISSN: 1070-9878
PURE UUID: b926b259-4f2d-414a-8977-703ee7f65ffd
ORCID for James Pilgrim: ORCID iD orcid.org/0000-0002-2444-2116

Catalogue record

Date deposited: 31 Jul 2019 16:30
Last modified: 14 May 2020 04:01

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