In view of the reduction in operational costs, container ships have become large-scaled so significantly that even larger ships of over 16,000 TEU have been designed and constructed in recent years. And these ships are applied heavy plates 70-90 mm in thickness. The Kca ≥ 4,000-6,000 N/mm1.5 of arrestability in temperature-gradient ESSO tests (large scale crack-arrest test) is needed for arresting super-long brittle cracks (193rd research committee of Japan Ship Research Association). Thus, in this paper, improvement in the arrestability of steel plates was achieved through investigating the effect of shear-lips. As a result, generating shear-lips at lower temperature and enhancing the propagating resistance of ductile cracks allowed us to improve arrestability. In addition, it is not practical for us to employ an ESSO test as a usual testing method for product inspection due to its large size. Accordingly, a Kca estimation method according to the combined use of a drop weight test together with a Charpy impact test was analyzed, and it was thus confirmed that said method had good accuracy regarding estimation.
The effect of shear-lips on the arrestability of thicker steel plates
Der Einfluss von Scherlippen auf das Rissauffangvermögen dickeren Grobblechs
2012
4 Seiten, 9 Bilder, 3 Tabellen, 8 Quellen
Conference paper
English
WELDED STRUCTURE HAVING EXCELLENT BRITTLE CRACK ARRESTABILITY
European Patent Office | 2021
Welding of Thicker Steel Joints of Container Ships
Online Contents | 2007
|Sol-gel method yields thicker ceramic coatings
Tema Archive | 1998
|