Contribution to the leak before break behavior of piping made of high tough material and containing circumferential flaws
- Univ. of Stuttgart (Germany). Staatliche Materialpruefungsanstalt
Since 1993 MPA Stuttgart is engaged in two new research projects in the field of Leak-Before-Break (LBB) behavior of austenitic piping. The pipes are fabricated in the dimensions O.D. {times} t = 219 x 14 mm resp. 331 x 32 mm and prepared with fatigue precracked, circumferential flaws of various depth and up to a crack length equivalent to 2{alpha} = 270 deg. The flaw location is in the base material or in site-made girth welds. The pipes are loaded with internal pressure and external bending moment at room temperature. In this paper the results of the tested pipes with 219 mm diameter containing through-wall flaws are represented as a comparison with the results of applied analytical methods. On these pipes the crack initiation clearly occurred before maximum bending moment, which was attained under full yielding conditions even in case of the 180 deg through-wall flaw. With the applied analytical methods crack initiation as well as maximum load could be assessed in a realistic manner.
- OSTI ID:
- 418132
- Report Number(s):
- CONF-960706-; ISBN 0-7918-1778-4; TRN: 97:001999
- 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 Pressure vessels and piping design, analysis, and severe accidents. PVP-Volume 331; Dermenjian, A.A. [ed.] [Sargent and Lundy, Chicago, IL (United States)]; PB: 219 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Refinement and evaluation of crack-opening-area analyses for circumferential through-wall cracks in pipes
Plastic fracture mechanics prediction of fracture instability in a circumferentially cracked pipe in bending - 1. J-integral analysis