TY - JOUR
T1 - Numerical analysis of asymmetric fatigue crack growth behaviors of circular notched bar specimen resulting from various geometric misalignments
AU - Kim, Ilhyun
AU - Zhao, Yongjian
AU - Choi, Byoung Ho
AU - Lee, Ji Mi
AU - Lee, Ki Soo
AU - Lee, Jeong Moo
N1 - Funding Information:
The support provided by LG Chem for this work is specially acknowledged. This work was also supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science, and Technology (MEST) (NRF-331-2008-1-D00005).
Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2013/8
Y1 - 2013/8
N2 - The effects of various misalignments of circular notched bar (CNB) specimens on the fatigue crack propagation behavior of pipe grade polyethylene were investigated by finite element analyses. Generally, as the misalignments increased, the asymmetric crack growth accelerated with a consequent decrease in the time taken to reach the critical stress intensity factors. It was therefore confirmed that the lifetime to failure of CNB specimens varies noticeably when they are misaligned. Going by our study results, the fatigue crack growth behavior of CNB specimens, including their lifetime estimations, should be considered by addressing the effects of their misalignments.
AB - The effects of various misalignments of circular notched bar (CNB) specimens on the fatigue crack propagation behavior of pipe grade polyethylene were investigated by finite element analyses. Generally, as the misalignments increased, the asymmetric crack growth accelerated with a consequent decrease in the time taken to reach the critical stress intensity factors. It was therefore confirmed that the lifetime to failure of CNB specimens varies noticeably when they are misaligned. Going by our study results, the fatigue crack growth behavior of CNB specimens, including their lifetime estimations, should be considered by addressing the effects of their misalignments.
KW - Circular notched bar specimen
KW - Fatigue crack growth
KW - Fatigue lifetime
KW - Geometric misalignment
KW - Stress intensity factor
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U2 - 10.1016/j.engfracmech.2013.04.015
DO - 10.1016/j.engfracmech.2013.04.015
M3 - Article
AN - SCOPUS:84881024532
VL - 108
SP - 50
EP - 64
JO - Engineering Fracture Mechanics
JF - Engineering Fracture Mechanics
SN - 0013-7944
ER -