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Research Papers

Numerical Simulation of Sealing Behavior of C-Ring for Reactor Pressure Vessel

[+] Author and Article Information
Dong Yuanyuan

Nuclear Power Institute of China, Science and Technology on Reactor System Design Technology Laboratory,
Changshun Avenue Section 1, No. 328, Chengdu, Sichuan 610213, China
e-mail: sshuimus@163.com

Luo Ying

Nuclear Power Institute of China, Science and Technology on Reactor System Design Technology Laboratory,
Changshun Avenue Section 1, No. 328, Chengdu, Sichuan 610213, China
e-mail: npicluo@sina.com

Zhang Liping

Nuclear Power Institute of China, Science and Technology on Reactor System Design Technology Laboratory,
Changshun Avenue Section 1, No. 328, Chengdu, Sichuan 610213, China

Manuscript received October 9, 2015; final manuscript received April 13, 2016; published online October 12, 2016. Assoc. Editor: Jovica R. Riznic.

ASME J of Nuclear Rad Sci 2(4), 041007 (Oct 12, 2016) (5 pages) Paper No: NERS-15-1206; doi: 10.1115/1.4033551 History: Received October 09, 2015; Accepted April 29, 2016

C-ring, whose sealing behavior is the key to the sealing structure, is one of the main seal-rings for a reactor pressure vessel (RPV). A finite-element model with less simplification has been established using ANSYS APDL to simulate the sealing behavior of C-ring. The numerical results, including sealing-behavior curve, specific pressure, and springback value, have been compared with test results at 7.67%, 8.42%, and 8.09% compression ratios, respectively. It confirms the validity of this numerical simulation method. With the numerical method, the deformation and stress distribution and sealing-behavior curve of C-ring can be obtained. The behavior curve can be divided into five sections. At 10% compression ratio, the peak contact stress is 501 MPa, the contact width is 3.22 mm, the total springback value is 0.460 mm, the effective springback value is 0.332 mm, and the linear load is 788  N/mm. As C-ring is composed of three parts, three models, i.e., spring-only, spring with inner lining, and spring with two linings, have been simulated to study the effect of the contact states among each part on sealing behavior.

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References

Lindley, P. B., 1966, “Load-Compression Relationships of Rubber Units,” J. Strain Anal. Eng. Des., 1(3), pp. 190–195. 0309-3247 10.1243/03093247V013190
Lindley, P. B., 1967, “Compression Characteristics of Laterally-Unrestrained Rubber O-Rings,” J. Inst. Rubber Ind., 1(4), pp. 209–213.
Hertz, H., 1982, “Uber die Beruhrung Fester Elastischer Korper (On the Contact of Elastic Solids),” J. reine angewandte Mathematik, 92, pp. 156–171 (in German).
Johnson, K. L., 1985, Contact Mechanics, Cambridge University Press, United Kingdom.
Wei-wei, Y., Li-xun, C., Yu-ming, Y., and Guo, Z., 2006, “Springback Properties of INCONEL718 Alloy O-Ring,” Eng. Mech., 23(6), pp. 142–147 (in Chinese). 0013-7944
Xiang-he, P., Zhi-hui, G., and Xiang-guo, Z., 1998, “An Analysis for Finite Elastoplastic Deformation and Cyclic Relaxation of Confined O-Ring for Pressure Vessel,” J. Chongqing Univ. (Natural Science Edition), 21(2), pp. 46–50 (in Chinese).
Yin-biao, H., Jia-di, Q., and Yi-kang, D., 2004, “Sealing Behavior Research on Metal O-Ring of Reactor Pressure Vessel,” Pressure Vessel Technol., 21(9), pp. 9–12 (in Chinese).
Yuan-yuan, D., Ying, L., and Li-ping, Z., 2015, “Study on Numerical Simulation for Sealing Behavior of C-Ring,” Nucl. Power Eng., 36(2), pp. 155–159 (in Chinese).
Xing-gen, L., Ren-liang, C., Jian-wei, H., Jie, L., Shi-jun, W., and Yong, L., 2013, “Manufacture of C-Type Ring for Reactor Pressure Vessels,” Pressure Vessel Technol., 30(5), pp. 74–79 (in Chinese).
Guan-ming, X., Yuan-gang, D., Xiao-yun, D., Wei, T., Ting, J., and Neng-ren, Y., 2012, “Numerical Simulation Research on C-Ring of CPR1000 Reactor Pressure Vessel,” Nucl. Power Eng., 33(6), pp. 15–20 (in Chinese).
Shu-guang, G., and Yun-qing, H., 2009, FEA and ANSYS APDL Programming and Advanced Applications, China Machine Press, Beijing.
Special Metals Corporation, 2004, “INCONEL Alloy X750: SMC-067,” Special Metals Corporation Group of Companies, USA, www.specialmetals.com.
Special Metals Corporation, 2004, “INCONEL Alloy 600: SMC-027,” Special Metals Corporation Group of Companies, USA, www.specialmetals.com.

Figures

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Fig. 1

Structure of the C-ring: (a) general and (b) profile

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Fig. 2

Model of the C-ring: (a) spring_front, (b) spring_lateral, (c) C-ring_front, and (d) C-ring_lateral

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Fig. 3

Meshing of the sealing structure

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Fig. 4

Sealing-behavior curves of tests and simulations at different compressions

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Fig. 5

Deformation of the C-ring: (a) compression state and (b) springback state

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Fig. 6

Equivalent stress distribution of the C-ring: (a) compression state and (b) springback state

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Fig. 7

Contact-stress distribution of the C-ring: (a) distribution of contact stress and (b) contact stress in five paths

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Fig. 8

Sealing-behavior curve of the C-ring

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Fig. 9

Sealing-behavior curves of three models

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