TY - JOUR
T1 - Identification of stress state dependent fracture micromechanisms in DP600 through representative volume element modeling
AU - Qin, Shipin
AU - Beese, Allison M.
N1 - Funding Information:
The authors gratefully acknowledge the support from NIST Grant 60NANB15D284.
Publisher Copyright:
© 2020
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2021/3/15
Y1 - 2021/3/15
N2 - The stress state dependent fracture behavior of DP600 was investigated using a representative volume element (RVE) based finite element model. To simulate fracture at the microscale, fracture models for ferrite and martensite were incorporated into the RVE, which was loaded under seven stress states. To compare the simulated damage accumulation and eventual failure in the RVE with experimentally measured continuum-based strain to failure, five RVE-level failure criteria are presented, and their ability to predict the continuum-level stress state dependent fracture strain of the material is discussed. The microstructural heterogeneity resulted in heterogeneous strain fields, and played a dominant role in the stress state dependent fracture behavior of materials. The simulations showed that in DP600, microcracks initiate from martensite regardless of the global stress state, whereas the propagation of cracks or initiation of new cracks depends on stress state.
AB - The stress state dependent fracture behavior of DP600 was investigated using a representative volume element (RVE) based finite element model. To simulate fracture at the microscale, fracture models for ferrite and martensite were incorporated into the RVE, which was loaded under seven stress states. To compare the simulated damage accumulation and eventual failure in the RVE with experimentally measured continuum-based strain to failure, five RVE-level failure criteria are presented, and their ability to predict the continuum-level stress state dependent fracture strain of the material is discussed. The microstructural heterogeneity resulted in heterogeneous strain fields, and played a dominant role in the stress state dependent fracture behavior of materials. The simulations showed that in DP600, microcracks initiate from martensite regardless of the global stress state, whereas the propagation of cracks or initiation of new cracks depends on stress state.
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U2 - 10.1016/j.ijmecsci.2020.106209
DO - 10.1016/j.ijmecsci.2020.106209
M3 - Article
AN - SCOPUS:85096829676
VL - 194
JO - International Journal of Mechanical Sciences
JF - International Journal of Mechanical Sciences
SN - 0020-7403
M1 - 106209
ER -