TY - GEN
T1 - Numerical study on longitudinal distance effect on failure stress of non-aligned twin cracked pipe
AU - Nguyen, Thanh Long
AU - Lee, Myeong Woo
AU - Hasegawa, Kunio
AU - Kim, Yun Jae
N1 - Funding Information:
This research was supported by National Research Foundation of Korea(NRF) funded by the Ministry of Science, ICT and Future Planning. (NRF-2016M2A8A1952771, NRF-2017R1A2B2009759)
Publisher Copyright:
Copyright © 2018 ASME.
PY - 2018
Y1 - 2018
N2 - In this study, the effect of longitudinal distance H between non-aligned twin cracks is investigated using finite element damage analysis. The FE damage analysis based on the stress-modified fracture strain model is used to calculate the failure stress of non-aligned twin cracked pipe. Parametric study on the axial distance H between non-aligned twin cracks with various crack depths and lengths were conducted and compared with predictions using the alignment rules and the net-section collapse load approach for single crack provided in ASME Code. It is shown that the trend of the predicted collapse bending stresses for the non-aligned twin cracked pipes using FE damage analysis are different from the ones using the alignment rule.
AB - In this study, the effect of longitudinal distance H between non-aligned twin cracks is investigated using finite element damage analysis. The FE damage analysis based on the stress-modified fracture strain model is used to calculate the failure stress of non-aligned twin cracked pipe. Parametric study on the axial distance H between non-aligned twin cracks with various crack depths and lengths were conducted and compared with predictions using the alignment rules and the net-section collapse load approach for single crack provided in ASME Code. It is shown that the trend of the predicted collapse bending stresses for the non-aligned twin cracked pipes using FE damage analysis are different from the ones using the alignment rule.
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U2 - 10.1115/PVP201884838
DO - 10.1115/PVP201884838
M3 - Conference contribution
AN - SCOPUS:85056893412
T3 - American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
BT - Codes and Standards
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2018 Pressure Vessels and Piping Conference, PVP 2018
Y2 - 15 July 2018 through 20 July 2018
ER -