Mechanics property analysis and constitutive model construction of TC4 titanium alloy
Constructing a constitutive mode for TC4 titanium alloy enhances the precision in describing and predicting its mechanical behavio,thus providing a accurate and reliable theoretical basis for its practical production applications.This study conducted high-temperature compression experiments aimed at investigating the relationships between flow stress of TC4 titanium alloy and factors such as strain,strain rate,and temperature.An initial Johnson-Cook(JC)constitutive model is established based on the experiments results.Further modifications are made to the constitutive model considered the interrelationships between strain,deformation temperature,and strain rate and the parameter optimization is conducted using data fitting methods.Finally,the data fitting and experimentsl results is compared,and the efficacy of different constitutive models in predicting flow stress is evaluated quantitatively using the correlation coefficient R with the help of errors.Results show that the error correlation coefficient R between the predicted values of the established constitutive model can achieve 0.999,indicating that it can predict the mechanical behavior of TC4 alloy more accurately compared to the original JC model.
万方数据
维普
