Abstract
In this study, the mechanical properties of materials under different stress states, strain rates, and temperatures were tested, and a variety of material mechanical properties were obtained. The modified Johnson-Cook (JC) constitutive model and ASCE-MJC fracture criterion with Lode angle correction were calibrated. A 6082-T6 aluminium alloy projectile with a diameter of 5.95 mm was used in performing the Taylor impact test with an impact velocity ranging from 156.548 to −417.216 m/s. Mushrooming and shear cracking were observed during the test. A finite element model (FEM) corresponding to the test was established using the finite element software ABAQUS, and the model was used to predict the ductile fracture behaviour of the projectile. Through a comparison of experiments and parallel simulations, the ASCE-MJC fracture criterion was used to predict a very close fracture mode of the projectile. This proves the validity of the calibrated dynamic constitutive model and the fracture criterion. After comparing the finite element simulation results based on the classic JC fracture criterion prediction, it was found that the ASCE-MJC fracture criterion can better predict the ductility of 6082-T6 aluminium alloy, indicating that the fracture behaviour of the material has a significant Lode correlation. This improvement was verified. The validity of the modified JC constitutive model and ASCE-MJC fracture criterion in predicting the dynamic mechanical properties and fracture behaviour of the 6082-T6 aluminium alloy was also verified.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.