TY - JOUR
T1 - Prediction model for initiation in cracked component under very low cycle fatigue
AU - Hwang, Jin Ha
AU - Kim, Yun Jae
AU - Kim, Jin Weon
N1 - Funding Information:
This work was supported by the Nuclear Power Core Technology Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea. (No. 20193110100020)
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/12
Y1 - 2021/12
N2 - In this paper, a model is proposed to predict the initiation cycle of a cracked component under very low cycle fatigue. The prediction model is based on the simple assumption that mechanism of crack initiation in a cracked component under very low cycle fatigue loading is the same as that under monotonic loading, and is given in terms of the plastic component of monotonic J and cyclic ΔJ. For validation, predicted cycles are compared with displacement-controlled cyclic C(T) test data with two load ratios and load-controlled C(T) test data with two amplitudes. The predicted cycles based on 0.2 mm crack growth are similar in all cases.
AB - In this paper, a model is proposed to predict the initiation cycle of a cracked component under very low cycle fatigue. The prediction model is based on the simple assumption that mechanism of crack initiation in a cracked component under very low cycle fatigue loading is the same as that under monotonic loading, and is given in terms of the plastic component of monotonic J and cyclic ΔJ. For validation, predicted cycles are compared with displacement-controlled cyclic C(T) test data with two load ratios and load-controlled C(T) test data with two amplitudes. The predicted cycles based on 0.2 mm crack growth are similar in all cases.
KW - Compact tension specimen
KW - Cyclic ΔJ integral
KW - Initiation of crack growth
KW - Monotonic fracture toughness
KW - Very low cycle fatigue loading
UR - http://www.scopus.com/inward/record.url?scp=85117119707&partnerID=8YFLogxK
U2 - 10.1016/j.tafmec.2021.103123
DO - 10.1016/j.tafmec.2021.103123
M3 - Article
AN - SCOPUS:85117119707
SN - 0167-8442
VL - 116
JO - Theoretical and Applied Fracture Mechanics
JF - Theoretical and Applied Fracture Mechanics
M1 - 103123
ER -