TY - GEN
T1 - Finite element damage analyses for predictions of creep crack growth
AU - Oh, Chang Sik
AU - Kim, Nak Hyun
AU - Min, Sung Hwan
AU - Kim, Yun Jae
PY - 2010
Y1 - 2010
N2 - This paper provides the virtual simulation method for creep crack growth test, based on finite element (FE) analyses with damage mechanics. Creep tests of smooth bars are used to quantify the constants of creep constitutive equation. the reduction of area resulting from creep tests of smooth and notched bar is adopted as a measure of creep ductility under multiaxial stress conditions. the creep ductility exhaustion concept is adopted for calculating creep damage, which is defined as the ratio of creep strain to the multiaxial creep ductility. To simulate crack propagation, fully damaged elements are forced to have nearly zero stresses using userdefined subroutine UHARD in the general-purpose FE code, ABAQUS. the results from 2D or 3D FE analyses are compared with experimental data of creep crack growth. It is shown that the predictions obtained from this new method are in good agreement with experimental data.
AB - This paper provides the virtual simulation method for creep crack growth test, based on finite element (FE) analyses with damage mechanics. Creep tests of smooth bars are used to quantify the constants of creep constitutive equation. the reduction of area resulting from creep tests of smooth and notched bar is adopted as a measure of creep ductility under multiaxial stress conditions. the creep ductility exhaustion concept is adopted for calculating creep damage, which is defined as the ratio of creep strain to the multiaxial creep ductility. To simulate crack propagation, fully damaged elements are forced to have nearly zero stresses using userdefined subroutine UHARD in the general-purpose FE code, ABAQUS. the results from 2D or 3D FE analyses are compared with experimental data of creep crack growth. It is shown that the predictions obtained from this new method are in good agreement with experimental data.
UR - http://www.scopus.com/inward/record.url?scp=80155157291&partnerID=8YFLogxK
U2 - 10.1115/PVP2010-25294
DO - 10.1115/PVP2010-25294
M3 - Conference contribution
AN - SCOPUS:80155157291
SN - 9780791849255
T3 - American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
SP - 331
EP - 335
BT - American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
T2 - ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference, PVP2010
Y2 - 18 July 2010 through 22 July 2010
ER -