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Plastic eta factor and blunting line for characterization of fracture toughness of dissimilar metal weld
Author(s) -
Kumar Suranjit,
Kumar Anshu,
Singh Pawan Kumar,
Chattopadhyay Jayanta
Publication year - 2019
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.12985
Subject(s) - fracture toughness , materials science , tension (geology) , fracture (geology) , welding , composite material , displacement (psychology) , toughness , line (geometry) , structural engineering , joint (building) , metallurgy , ultimate tensile strength , engineering , geometry , mathematics , psychology , psychotherapist
This paper addresses the fracture toughness evaluation procedure of different zones of dissimilar metal weld (DMW). Experiments have been conducted on compact tension specimens from DMW joint having initial notch in centre of weld and fusion boundaries. Plastic eta factors ( η p ) and slope of blunting line ( bl ) for above specimens have been evaluated numerically. Experimental load, load line displacement, and crack growth data along with numerically evaluated η p and bl have been used for calculation of fracture resistance curve and initiation fracture toughness, and finally, it has been compared with that evaluated as per ASTM E1820 and ESIS standard.