NDLI: Investigation of Design Parameters and Failure Criteria of O-Ring Seal Structure

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Hu, Dianyin Wang, Rongqiao Ren, Quanbin Hong, Jie
Copyright Year	2005
Abstract	First, this paper established the seal structural 2D axisymmetric model of a certain Solid Rocket Booster (SRB) and calculated the deformation and stresses at ignition through a large displacement, incompressible, contact finite element analysis. The results show that the maximum contact stress appears at the contact area and the maximum shear stress at groove notch. Then, some typical parameters of the seal structure which might have the impact on the sealing performance, such as the gap breadth, initial compressibility, fillets of the groove notch and bottom, groove width, were analyzed. We can find that the gap breadth and initial compressibility do great contributions to the maximum contact normal stress, and the groove notch and bottom fillets act upon the maximum shear stress obviously. In order to verify the validity of the 2D axisymmetric model, 3D structural finite element analysis of the structure was conducted, and the results indicate that in service, the upper flange is inclined relative to the nether flange, which seems to mean that the gap breadth can not be considered as a constant during the 2D axisymmetric analysis. However further calculations say that if using the minimum gap breadth gotten in 3D analysis as its constant gap value, the above 2D axisymmetric model can rationally take the place of 3D model to analyze the sealing performance. Finally, the failure modes & criteria of the O-ring seals based on the maximum contact normal stress and shear stress were determined to ensure the reliability of this structure.
Sponsorship	International Gas Turbine Institute
Starting Page	405
Ending Page	412
Page Count	8
File Format	PDF
ISBN	0791847276
DOI	10.1115/GT2005-68434
e-ISBN	0791837548
Volume Number	Volume 4: Turbo Expo 2005
Conference Proceedings	ASME Turbo Expo 2005: Power for Land, Sea, and Air
Language	English
Publisher Date	2005-06-06
Publisher Place	Reno, Nevada, USA
Access Restriction	Subscribed
Subject Keyword	Stresses Failure criteria Finite element analysis O-ring seal Large deformation Contact Design Deformation Failure Stress Seals
Content Type	Text
Resource Type	Article

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