TY - JOUR

T1 - Finite strain transient creep of D16T alloy

T2 - Identification and validation employing heterogeneous tests

AU - Shutov, A. V.

AU - Larichkin, A. Yu

PY - 2017/10/22

Y1 - 2017/10/22

N2 - A cyclic creep damage model, previously proposed by the authors, is modified for a better description of the transient creep of D16T alloy observed in the finite strain range under rapidly changing stresses. The new model encompasses the concept of kinematic hardening, which allows us to account for the creep-induced anisotropy. The model kinematics is based on the nested multiplicative split of the deformation gradient, proposed by Lion. The damage evolution is accounted for by the classical Kachanov-Rabotnov approach. The material parameters are identified using experimental data on cyclic torsion of thick-walled samples with different holding times between load reversals. For the validation of the proposed material model, an additional experiment is analyzed. Although this additional test is not involved in the identification procedure, the proposed cyclic creep damage model describes it accurately.

AB - A cyclic creep damage model, previously proposed by the authors, is modified for a better description of the transient creep of D16T alloy observed in the finite strain range under rapidly changing stresses. The new model encompasses the concept of kinematic hardening, which allows us to account for the creep-induced anisotropy. The model kinematics is based on the nested multiplicative split of the deformation gradient, proposed by Lion. The damage evolution is accounted for by the classical Kachanov-Rabotnov approach. The material parameters are identified using experimental data on cyclic torsion of thick-walled samples with different holding times between load reversals. For the validation of the proposed material model, an additional experiment is analyzed. Although this additional test is not involved in the identification procedure, the proposed cyclic creep damage model describes it accurately.

KW - RHEOLOGICAL MODELS

KW - VISCOPLASTICITY

KW - DEFORMATION

KW - TEMPERATURE

KW - COMPRESSION

KW - INTEGRATION

KW - BEHAVIOR

KW - TENSION

KW - STRESS

KW - SPLIT

UR - http://www.scopus.com/inward/record.url?scp=85033234343&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/894/1/012110

DO - 10.1088/1742-6596/894/1/012110

M3 - Article

AN - SCOPUS:85033234343

VL - 894

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 1

M1 - 012110

ER -