TY - JOUR
T1 - Possibility to Estimate Fracture Toughness of Ductile Steel Materials from Small Punch Test Data
AU - Jeon, J. Y.
AU - Kim, Y. J.
AU - Kim, J. W.
AU - Lee, S. Y.
N1 - Publisher Copyright:
© 2015 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.
Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2015
Y1 - 2015
N2 - This paper presents a procedure to predict fracture toughness of steel material using small punch test (or notched small punch test) and finite element (FE) damage analysis. Tensile property can be determined from setting the constitutive equations and can be validated by comparing the small punch (SP) test data with FE results applying the determined tensile property. FE damage analysis used in this paper is based on the strain-based fracture model. Material constants in the model are normally determined from analyzing notched bar tensile tests. To determine these material constants from SP test instead of notched bar tensile tests, simplified model (with only one material constant) can be introduced and used in the simulations. SP test and notched small punch (NSP) test are simulated via FE damage analyses using the tensile property and simplified strain-based fracture model. NSP simulation results are sensitive to element size. However, SP simulation results are not sensitive to element size. Compact tension (C(T)) test is also simulated and it can be found that the proper element size for C(T) simulation is four times of that for NSP simulation to predict cracking initiation toughness.
AB - This paper presents a procedure to predict fracture toughness of steel material using small punch test (or notched small punch test) and finite element (FE) damage analysis. Tensile property can be determined from setting the constitutive equations and can be validated by comparing the small punch (SP) test data with FE results applying the determined tensile property. FE damage analysis used in this paper is based on the strain-based fracture model. Material constants in the model are normally determined from analyzing notched bar tensile tests. To determine these material constants from SP test instead of notched bar tensile tests, simplified model (with only one material constant) can be introduced and used in the simulations. SP test and notched small punch (NSP) test are simulated via FE damage analyses using the tensile property and simplified strain-based fracture model. NSP simulation results are sensitive to element size. However, SP simulation results are not sensitive to element size. Compact tension (C(T)) test is also simulated and it can be found that the proper element size for C(T) simulation is four times of that for NSP simulation to predict cracking initiation toughness.
KW - Finite element damage analysis
KW - Fracture toughness prediction
KW - Small punch test
KW - Strain-based fracture model
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U2 - 10.1016/j.proeng.2015.12.257
DO - 10.1016/j.proeng.2015.12.257
M3 - Conference article
AN - SCOPUS:84964061151
VL - 130
SP - 1029
EP - 1038
JO - Procedia Engineering
JF - Procedia Engineering
SN - 1877-7058
T2 - 14th International Conference on Pressure Vessel Technology, 2015
Y2 - 23 September 2015 through 26 September 2015
ER -