engleski

Distribution of Stresses in the Vicinity of Straight Crack Front with Present Materials Dissimilarity

Three point bend fracture tests were performed on the Bx2B specimens cracked in the middle and through the thickness with present materials and geometric mismatch. Direct measurement of the local CTOD (d5) displacement enables to distinct local and global mismatch. Stress and strain distribution in the vicinity of the crack front obtained by three-dimensional finite element analysis assists to better understanding of the possible causes of fracture. The aim of this paper is to determine the stress distribution at the moment of the crack initiation at the vicinity of the crack front in strength mismatch welded joints with different fracture resistances.

fracture toughness specimen; straight crack; weld joint; strength mismatch; stress distribution

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