Stress and strength analysis of fiber reinforced plastic pipe tees with reinforcement
- Marquette Univ., Milwaukee, WI (United States). Dept. of Mechanical and Industrial Engineering
- Tsinghua Univ., Beijing (China). Dept. of Engineering Mechanics
In this paper, a stress and strength analysis of fiber reinforced plastic (FRP) pipe tees with reinforcement by use of 3-D finite element method is presented. Wilson`s incompatible elements and the 16-node 3-D element with relative degrees of freedom have been employed to carry out the analysis. The reliability of the program is also investigated. Two reinforcing methods, pad and compact reinforcement, are investigated. The fact that the properties and principal directions of the materials of the two intersecting pipes and the reinforcement are different has been taken into account in the analysis. The continuity of stress and strain fields at the intersecting surface of two different materials is considered in the post processing of the FEM results. The results show that the stress concentration in a FRP pipe intersection without reinforcement (r/R = 0.4--0.7) is significant. A reasonable design can be obtained by considering both stress fields and the orthotropic strength parameters of the materials. The in-plane shear stress may be the controlling factor because of the relatively low shear strength of most composites. Use of either reinforcing method does not change the location of the maximum tensile stress and the maximum shear stress, and both alleviate the stress concentration at the intersection. It is shown that the compact reinforcing method is more effective than the pad one. The larger the reinforcing area of the compact reinforcing method, the smaller the stress concentration factor, but the lower the rate of reduction.
- OSTI ID:
- 404164
- Report Number(s):
- CONF-960706-; ISBN 0-7918-1773-3; TRN: IM9652%%24
- Resource Relation:
- Conference: American Society of Mechanical Engineers (ASME) pressure vessels and piping conference, Montreal (Canada), 21-26 Jul 1996; Other Information: PBD: 1996; Related Information: Is Part Of Computer technology -- 1996: Applications and methodology. PVP-Volume 326; Hulbert, G.M. [ed.] [Univ. of Michigan, Ann Arbor, MI (United States)]; Hsu, K.H. [ed.] [Babcock and Wilcox, Barberton, OH (United States)]; Lee, T.W. [ed.] [FMC Corp., Santa Clara, CA (United States)]; Nicholas, T. [ed.] [USAF Wright Laboratory, Wright-Patterson AFB, OH (United States)]; PB: 217 p.
- Country of Publication:
- United States
- Language:
- English
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