Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 1029-1038 |
| Number of pages | 10 |
| Journal | Procedia Engineering |
| Volume | 130 |
| DOIs | |
| Publication status | Published - 2015 Jan 1 |
| Externally published | Yes |
| Event | 14th International Conference on Pressure Vessel Technology, 2015 - Shanghai, China Duration: 2015 Sep 23 → 2015 Sep 26 |
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Keywords
- Finite element damage analysis
- Fracture toughness prediction
- Small punch test
- Strain-based fracture model
ASJC Scopus subject areas
- Engineering(all)
Cite this
Possibility to Estimate Fracture Toughness of Ductile Steel Materials from Small Punch Test Data. / Jeon, J. Y.; Kim, Yun Jae; Kim, J. W.; Lee, S. Y.
In: Procedia Engineering, Vol. 130, 01.01.2015, p. 1029-1038.Research output: Contribution to journal › Conference article
}
TY - JOUR
T1 - Possibility to Estimate Fracture Toughness of Ductile Steel Materials from Small Punch Test Data
AU - Jeon, J. Y.
AU - Kim, Yun Jae
AU - Kim, J. W.
AU - Lee, S. Y.
PY - 2015/1/1
Y1 - 2015/1/1
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
UR - http://www.scopus.com/inward/record.url?scp=84964061151&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84964061151&partnerID=8YFLogxK
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
ER -