TY - JOUR
T1 - A Modified Johnson Cook Constitutive Model for Aermet 100 at Elevated Temperatures
AU - Zhanwei, Yuan
AU - Fuguo, Li
AU - Guoliang, Ji
N1 - Publisher Copyright:
© 2018 Walter de Gruyter GmbH, Berlin/Boston 2018.
PY - 2018/1/26
Y1 - 2018/1/26
N2 - The predicted flow behaviors of Aermet 100 steel were analyzed within a wide range of temperatures of 1,073 K-1,473 K and strain rates of 0.01 s-1-50 s-1 based on isothermal compression tests. Using the original Johnson Cook (JC) model and a modified Johnson Cook (MJC) model, the constitutive equations were constructed in the case of elevated temperatures. For both the JC and MJC, and the previously studied (Arrhenius-type model and double-multivariate nonlinear regression (DMNR)) models, their respective predictability levels were evaluated by contrasting both the correlation coefficient R and the average absolute relative error (AARE). The results showed that the prediction from the three models meet the accuracy requirement based on the experimental data, the only exception being the JC model. By comparing the predictability and numbers of material constants involved, the modified Johnson Cook model is regarded as an excellent choice for predicting the flow behaviors of Aermet 100 steel within the range being studied.
AB - The predicted flow behaviors of Aermet 100 steel were analyzed within a wide range of temperatures of 1,073 K-1,473 K and strain rates of 0.01 s-1-50 s-1 based on isothermal compression tests. Using the original Johnson Cook (JC) model and a modified Johnson Cook (MJC) model, the constitutive equations were constructed in the case of elevated temperatures. For both the JC and MJC, and the previously studied (Arrhenius-type model and double-multivariate nonlinear regression (DMNR)) models, their respective predictability levels were evaluated by contrasting both the correlation coefficient R and the average absolute relative error (AARE). The results showed that the prediction from the three models meet the accuracy requirement based on the experimental data, the only exception being the JC model. By comparing the predictability and numbers of material constants involved, the modified Johnson Cook model is regarded as an excellent choice for predicting the flow behaviors of Aermet 100 steel within the range being studied.
KW - Aermet 100
KW - constitutive model
KW - modified Johnson Cook model
UR - http://www.scopus.com/inward/record.url?scp=85042091226&partnerID=8YFLogxK
U2 - 10.1515/htmp-2016-0096
DO - 10.1515/htmp-2016-0096
M3 - 文章
AN - SCOPUS:85042091226
SN - 0334-6455
VL - 37
SP - 163
EP - 172
JO - High Temperature Materials and Processes
JF - High Temperature Materials and Processes
IS - 2
ER -