Inelastic analysis of complex piping systems in elevated temperature environment by the simplified methods
This paper presents two simplified methods which are capable of analyzing complex piping systems under elevated temperature. Both methods employ beam-type elements based on the force method and take account of interactive effects of combined moments. One of the methods consists of two steps of calculation; deformation of piping systems are first analyzed in the elastic-creep range, and secondly stress and strain of the single bend of interest are calculated by stress analysis program. The other is applicable to the problems in the elastic-plastic-creep range. The common constitutive relations of material nonlinealities are employed to derive an equilibrium equation of an element, in which plastic deformations are treated as a special case of creep one. The MARC program as well as the two simplified methods are applied to the three typical problems of piping systems. As a first example, a piping system with four elbows is analyzed in order to verify the validity of the simplified methods. Secondly, under actual loading and boundary conditions, a complicated piping system is analyzed by the simplified methods. Finally, the problem of three anchor piping system subjected to thermal expansion will also be calculated to investigate redistribution of plastic strains in the system.
- Research Organization:
- University of Tsukuba, Ibaraki
- OSTI ID:
- 5482066
- Report Number(s):
- CONF-820602-
- Journal Information:
- Am. Soc. Mech. Eng., Pressure Vessels Piping Div., (Tech. Rep.) PVP; (United States), Vol. PVP-VOL. 66; Conference: 19. design automation conference, Las Vegas, NV, USA, 14 Jun 1982
- Country of Publication:
- United States
- Language:
- English
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