The Paton Welding Journal, 2012, №07



2012 №07 (10)

2012 №07 (02)

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The Paton Welding Journal, 2012, #7, 2-5 pages  

INTER-INFLUENCE OF DEFECTS IN WELDED JOINT ZONE AT DIFFERENT FORCE LOADING

V.I. MAKHNENKO, E.A. VELIKOIVANENKO, A.S. MILENIN, G.F. ROZYNKA and N.I. PIVTORAK

E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
 
 
Abstract
It is noted that force interaction of group discontinuity defects of material in welded structures is not necessarily reduced to the concept, according to which the adjacent defect impairs the service load resistance or does not affect it at a sufficiently large distance between them. A variant is considered, when interaction of group defects of the type of cracks or wall thinning defects, improves the resistance to service loading.
 
 
Keywords: welded joints, group defect interaction, parallel defects, collinear defects, fracture probability
 
 
Received:                02.03.12
Published:               28.07.12
 
 
References
1. MR-125-01-90: Calculation of stress intensity factors and section weakening for defects in welded joints. Kiev.
2. (2000) Fitness-for-service: American Petroleum Institute Recommended Practice 579.
3. Makhnenko, V.I. (2006) Safe operation resource of welded joints and assemblies of current structures. Kiev: Naukova Dumka.
4. (1999) Reference book on stress intensity factors. Vol. 1 and 2. Ed. by Yu. Murakavi. Moscow: Mir.
5. Makhnenko, V.I., Velikoivanenko, E.A., Rozynka, G.F. et al. (2010) Improvement of method for estimation of the risk of fracture within the thinning zone on walls of main pipelines. The Paton Welding J., 5, 10-14.

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