TY - GEN
T1 - Deformation and failure of bulk metallic glasses under different initial temperatures
AU - Li, J. C.
AU - Chen, X. W.
AU - Huang, F. L.
N1 - Publisher Copyright:
© 2015 Owned by the authors, published by EDP Sciences.
PY - 2015/9/7
Y1 - 2015/9/7
N2 - Based on the coupled thermo-mechanical model, a constitutive model for bulk metallic glasses (BMGs), which is generalized to the multi-axial stress state and considers the effects of free volume, heat and hydrostatic stress, has been modified in the present paper. Besides, a failure criterion of critical free volume concentration is introduced based on the coalescence mechanism of free volume. The constitutive model as well as the failure criterion is implemented into the LS-DYNA commercial software by user material subroutine (UMAT). Then FEM simulations for different initial material temperatures are conducted and the evolutions of material parameter as well as corresponding macroscopic mechanical behaviour of material are analyzed. Relative analysis shows that the initial material temperature significantly affects the deformation and failure of material.
AB - Based on the coupled thermo-mechanical model, a constitutive model for bulk metallic glasses (BMGs), which is generalized to the multi-axial stress state and considers the effects of free volume, heat and hydrostatic stress, has been modified in the present paper. Besides, a failure criterion of critical free volume concentration is introduced based on the coalescence mechanism of free volume. The constitutive model as well as the failure criterion is implemented into the LS-DYNA commercial software by user material subroutine (UMAT). Then FEM simulations for different initial material temperatures are conducted and the evolutions of material parameter as well as corresponding macroscopic mechanical behaviour of material are analyzed. Relative analysis shows that the initial material temperature significantly affects the deformation and failure of material.
UR - http://www.scopus.com/inward/record.url?scp=84958061333&partnerID=8YFLogxK
U2 - 10.1051/epjconf/20159404017
DO - 10.1051/epjconf/20159404017
M3 - Conference contribution
AN - SCOPUS:84958061333
T3 - EPJ Web of Conferences
BT - DYMAT 2015 - 11th International Conference on the Mechanical and Physical Behaviour of Materials Under Dynamic Loading
A2 - Cadoni, Ezio
PB - EDP Sciences
T2 - 11th International Conference on the Mechanical and Physical Behaviour of Materials Under Dynamic Loading, DYMAT 2015
Y2 - 7 September 2015 through 11 September 2015
ER -