It is well known that an axial bolt force which tightens a gasket decreases due to a creep of non-asbestos gaskets. A bolted flange joint contains a combined condition of the creep/relaxation. A reduction behavior of a tightening pressure due to an effect of creep/relaxation is related to lifetime assessment of the non-asbestos gasket, and a leakage prevention of internal fluid. In this research, the creep/relaxation of the bolted flange joint using the non-asbestos gasket is measured. The compressed creep test is carried out using four-inch flanges and non-asbestos compressed fiber sheet gaskets. The test conditions are room temperature and 90 hours. The result of creep/relaxation is evaluated by 3-D viscoelasticity model. The creep/relaxation that was evaluated by 3-D viscoelasticity model and the Young’s modulus of the non-asbestos gaskets that was measured by the nanoindentation testing is applied to the FE analysis. FE model that include viscoelasticity is 1/16 of the test device. The stress state of the non-asbestos gasket was confirmed by the FE analysis. Then, the validity of creep/relaxation of the non-asbestos gaskets that was evaluated by the 3-D viscoelasticity model was shown by comparison with the experimental value and the analysis result.
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ASME 2009 Pressure Vessels and Piping Conference
July 26–30, 2009
Prague, Czech Republic
Conference Sponsors:
- Pressure Vessels and Piping
ISBN:
978-0-7918-4365-9
PROCEEDINGS PAPER
Simulation of Creep/Relaxation Behavior in Bolted Flange Joints Based on 3-D Viscoelasticity Model of Gasket
Atsushi Yamaguchi,
Atsushi Yamaguchi
National Institute of Industrial Safety, Japan, Kiyose, Tokyo, Japan
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Hirokazu Tsuji,
Hirokazu Tsuji
Tokyo Denki University, Chiyoda, Tokyo, Japan
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Takashi Honda
Takashi Honda
National Institute of Industrial Safety, Japan, Kiyose, Tokyo, Japan
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Atsushi Yamaguchi
National Institute of Industrial Safety, Japan, Kiyose, Tokyo, Japan
Hirokazu Tsuji
Tokyo Denki University, Chiyoda, Tokyo, Japan
Takashi Honda
National Institute of Industrial Safety, Japan, Kiyose, Tokyo, Japan
Paper No:
PVP2009-77610, pp. 185-191; 7 pages
Published Online:
July 9, 2010
Citation
Yamaguchi, A, Tsuji, H, & Honda, T. "Simulation of Creep/Relaxation Behavior in Bolted Flange Joints Based on 3-D Viscoelasticity Model of Gasket." Proceedings of the ASME 2009 Pressure Vessels and Piping Conference. Volume 2: Computer Applications/Technology and Bolted Joints. Prague, Czech Republic. July 26–30, 2009. pp. 185-191. ASME. https://doi.org/10.1115/PVP2009-77610
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