Published: Jan 1983
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Within the scope of the cooperative project “Integrity of Components” (FKS) which is a part of the German Nuclear Safety Research Programme of the Federal Minister for Research and Technology, the theoretical and experimental investigation on ductile fracture is of decisive importance. The FKS is mainly concentrated on tearing tests on large-scale heavy-section specimens, in both the base material and welded conditions. Universal facilities up to 100 MN are available to test large-scale round and flat bars containing sharp defects in the form of machined notches, fatigue cracks, and natural flaws, such as segregation and heat-affected zone cracking. The dimensions are chosen so that it is possible to realize the significant technological states of material and stress over all conditions in the light-water reactor pressure vessel. The tested materials similar to A508 Class 2 and 3 cover a wide range of ductility (Cv upper-shelf toughness-40 to 200 J, crack initiation Ji = 50 to 200 kN/m, T-modulus = 10 to 300).
elastic-plastic fracture, toughness, static loading, large-scale and full-scale heavy-section testing, elastic limit, plastic limit, natural heat-affected zone cracking, size effect
Director and full professor, Staatliche Materialprüfungsanstalt (MPA), University of Stuttgart, Stuttgart,
Professor, Fachhochschule für Technik, Esslingen,