TY - JOUR
T1 - The effect of material ductility on notch fracture resistance
T2 - Numerical study
AU - Park, Eui Kyun
AU - Youn, Gyo Geun
AU - Kim, Yun Jae
AU - Ainsworth, Robert A.
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by Ministry of Science and ICT (MSIT) ( NRF-2019M2D2A2048296 , NRF-2018M2A8A4084016 ).
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/4
Y1 - 2021/4
N2 - In this work, the effect of material ductility on the notch fracture resistance is quantified using FE damage analysis based on a multi-axial fracture strain model. Material properties of SUS316 stainless steel with three different levels of cold work (5%, 20% and 40%) are used to represent materials with different strength and ductility. Using validated FE damage analysis, notch fracture resistance data for these three materials with three different notch radii (0.2 mm, 0.4 mm and 0.8 mm) are generated numerically. Examination of notch fracture resistance data suggests that fracture initiation resistance (corresponding to 0.2 mm crack growth) depends almost linearly on notch radius. A linear dependence of the normalized fracture resistance of a notched specimen (with respect to that of a cracked one) on the material ductility is also found. The results are useful to estimate notch fracture resistance from the material ductility and the J-resistance curve obtained from a cracked specimen.
AB - In this work, the effect of material ductility on the notch fracture resistance is quantified using FE damage analysis based on a multi-axial fracture strain model. Material properties of SUS316 stainless steel with three different levels of cold work (5%, 20% and 40%) are used to represent materials with different strength and ductility. Using validated FE damage analysis, notch fracture resistance data for these three materials with three different notch radii (0.2 mm, 0.4 mm and 0.8 mm) are generated numerically. Examination of notch fracture resistance data suggests that fracture initiation resistance (corresponding to 0.2 mm crack growth) depends almost linearly on notch radius. A linear dependence of the normalized fracture resistance of a notched specimen (with respect to that of a cracked one) on the material ductility is also found. The results are useful to estimate notch fracture resistance from the material ductility and the J-resistance curve obtained from a cracked specimen.
KW - Ductility
KW - Finite element damage analysis
KW - Multi-axial fracture strain model
KW - Notch fracture resistance
UR - http://www.scopus.com/inward/record.url?scp=85098056139&partnerID=8YFLogxK
U2 - 10.1016/j.tafmec.2020.102874
DO - 10.1016/j.tafmec.2020.102874
M3 - Article
AN - SCOPUS:85098056139
SN - 0167-8442
VL - 112
JO - Theoretical and Applied Fracture Mechanics
JF - Theoretical and Applied Fracture Mechanics
M1 - 102874
ER -