Application of line-spring/shell model to surface-cracked pipes and elbows
- Battelle, Columbus, OH (United States). Engineering Mechanics Dept.
The line-spring/shell model proposed by Rice and Levy (1972), and further modified by Parks and co-workers (1981, 1982, 1995) provides an attractive and inexpensive alternative to analyzing surface-cracked structures. This model idealizes the complex three-dimensional surface crack problem in a plate- or shell-like structure as a more tractable two-dimensional problem. Though used in some previous studies, this model has largely been ignored in the study of surface-cracked nuclear piping components. Owing to the lack of detailed investigations, it is generally believed that the predictions of the line-spring model is far less accurate. While it is true that the line-spring method has some restrictions, it can provide reasonably accurate predictions of important fracture parameters of cracked components in the domain of its applicability. Through some detailed studies of surface-cracked pipes and elbows, the predictive nature of the line-spring model is demonstrated by comparing its predictions with that of three-dimensional finite element model as well as with the experimental measurements. It is hoped that the results shown in this paper invalidates the criticisms and reestablishes the usefulness and reasonable accuracy of the line-spring model, within its domain of applicability, in the analyses of surface-cracked structures.
- OSTI ID:
- 403272
- Report Number(s):
- CONF-960706-; ISBN 0-7918-1771-7; TRN: 97:000208
- 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 Fatigue and fracture -- 1996: Volume 2. PVP-Volume 324; Yoon, K.K. [ed.] [Framatome Technologies, Lynchburg, VA (United States)]; Bhandari, S. [ed.] [Framatome, Paris (France)]; Bloom, J.M. [ed.] [Babcock and Wilcox, Alliance, OH (United States)]; Mehta, H. [ed.] [GE Nuclear Energy, San Jose, CA (United States)]; Wilkowski, G. [ed.] [Battelle, Columbus, OH (United States)]; PB: 295 p.
- Country of Publication:
- United States
- Language:
- English
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