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A method to evaluate ductile fracture toughness based on load separation principle
Author(s) -
Bao Chen,
Cai Lixun,
He Guangwei,
Wu Yuanjun
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.12893
Subject(s) - materials science , normalization (sociology) , calibration curve , fracture toughness , single specimen , enhanced data rates for gsm evolution , tension (geology) , composite material , structural engineering , fracture mechanics , compact tension specimen , bending , calibration , crack growth resistance curve , ultimate tensile strength , mathematics , crack closure , engineering , geology , telecommunications , statistics , sociology , anthropology , detection limit , paleontology
In combination with load separation principle, the P‐V curves of blunt‐notched specimens with different stationary cracks can be explicitly expressed as a unified formula. Further, a load separation‐based direct calibration (LSDC) method to predict instantaneous crack size and J ‐resistance curve of growing cracked specimen has been developed. Two specimen configurations, compact tension and single edge‐notched bending, which are made of Cr2Ni2MoV and Q345B, respectively, are employed to verify the validity of LSDC method. The results show that the estimated J ‐resistance curves are more reasonable in comparison with those obtained by unloading compliance and normalization method.