TY - GEN
T1 - Multiscale damage criterion for fatigue life prediction in metallic materials
AU - Luo, Chuntao
AU - Parra-Garcia, Manuel
AU - Chattopadhyay, Aditi
AU - Peralta, Pedro
AU - Wei, Jun
PY - 2009
Y1 - 2009
N2 - In this paper a multiscale damage criterion for fatigue life prediction is introduced. A damage evolution rule based on strain energy density is modified to incorporate crystal plasticity at the microscale. A damage tensor that indicates the local damage state is derived using optimization theory. Local damage information is passed from local to grain level in the form of a damage vector via averaging techniques. Finally, the damage evolution rule for a meso representative volume element (RVE) is calculated through the Kreisselmeier- Steinhauser (KS) function, which can produce an envelope function for multiobjective optimization. The weighted averaging method is also used to obtain the corresponding damage evolution direction for the meso RVE. A critical damage value is derived in this paper to complete the damage criterion for fatigue life prediction. Simulation results and comparison with experimental data are presented.
AB - In this paper a multiscale damage criterion for fatigue life prediction is introduced. A damage evolution rule based on strain energy density is modified to incorporate crystal plasticity at the microscale. A damage tensor that indicates the local damage state is derived using optimization theory. Local damage information is passed from local to grain level in the form of a damage vector via averaging techniques. Finally, the damage evolution rule for a meso representative volume element (RVE) is calculated through the Kreisselmeier- Steinhauser (KS) function, which can produce an envelope function for multiobjective optimization. The weighted averaging method is also used to obtain the corresponding damage evolution direction for the meso RVE. A critical damage value is derived in this paper to complete the damage criterion for fatigue life prediction. Simulation results and comparison with experimental data are presented.
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M3 - Conference contribution
AN - SCOPUS:84855627470
SN - 9781563479731
T3 - Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
BT - 50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
T2 - 50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Y2 - 4 May 2009 through 7 May 2009
ER -