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Experimental study of the relationship between fracture initiation toughness and brittle crack arrest toughness predicted from small-scale testing
, Article Theoretical and Applied Fracture Mechanics ; Volume 110 , 2020 ; Mehmanparast, A ; Kulka, R ; Moore, P ; Xu, L ; Farrahi, G. H ; Sharif University of Technology
Elsevier B.V
2020
Abstract
It is vital to prevent brittle cracks in large structures. This is particularly important for a number of industry sectors including offshore wind, Oil & Gas, and shipbuilding where structural failure risks loss of human life and loss of expensive assets. Some modern steels exhibit high Charpy energy – i.e. high initiation fracture toughness, but poor resistance to crack propagation – i.e. low crack arrest toughness. The correlation between initiation and arrest toughness measured through small-scale testing is investigated in five different steels, which include S355 structural steel (with two different thicknesses), X65 pipeline steel, two high strength reactor pressure vessel steels and...