High-Precision Analysis of J-C Dynamic Constitutive Parameters of Ti Alloy and Its Ballistic Performance

Using the software "J-C constitutive parameter and damage model parameter measurement system of materials", J-C dynamic constitutive parameters of a near a Ti alloy was obtained by clustering global optimization (CGO) method, which avoids the large amount of calculation and complexity of traditional measurement methods and shortcoming of not being able to capture parameter relevance. Through the anti-elasticity test of the titanium alloy target plate, using the J-C constitutive parameters, the commercial dynamics calculation software AUTODYN was used to complete the simulation of the shooting test. The simulation results are in good agreement with the test data, which verifies accuracy and precision of the J-C dynamic parameters. Bullet hole microstructure analysis show that adiabatic shear bands can be observed at the ends of the cracks, which proves that the initiation of cracks is caused by adiabatic shear bands, indicating that the failure mode under the high-speed impact dynamic environment is mainly adiabatic shear.