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Numerical prediction of notch bluntness effect on fracture resistance of SM490A carbon steel
Author(s) -
Youn GyoGeun,
Kim JiSoo,
Kim YunJae,
Kamaya Masayuki
Publication year - 2020
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.13141
Subject(s) - materials science , composite material , radius , fracture (geology) , tearing , fracture toughness , tension (geology) , finite element method , carbon steel , bar (unit) , ultimate tensile strength , structural engineering , corrosion , engineering , physics , computer security , meteorology , computer science
The present work investigates the notch radius effect on fracture resistance using the finite element (FE) damage analysis based on the multiaxial fracture strain model. The damage model was determined from experimental data of notched bar tensile and fracture toughness test data using a sharp‐cracked compact tension specimen. Then, the FE damage analysis was applied to simulate fracture resistance tests of SM490A carbon steel specimens with different notch radii. Comparison of simulated results with experimental data showed good agreement. Further simulation was then performed to see effects of the specimen size, thickness, and side groove on J ‐ R curves for different notch radii. It was found that effects of the specimen size and thickness became more pronounced for the larger notch radius. Furthermore, it was found that without side groove, tearing modulus for notched specimens was similar to that for cracked specimens, regardless of the notch radius.