Study on dynamic mechanical properties of ZTA ceramics and penetration resistance behavior of fiber-reinforced composite structures
In order to investigate the dynamic mechanical properties of ZrO2 toughened Al2O3 ceramics(ZTA ce-ramics)under high strain rates,focusing on the basis of obtaining its quasi-static mechanical properties parame-ters,experiments of 1.0～2.5 km/s flyer plate impacting ZTA ceramics were conducted using a secondary light gas gun.Dynamic parameters such as shock wave velocity and Hügoniot elastic limit were obtained,and the parameters and state equations of JH-2 constitutive model suitable for the dynamic mechanical properties of ZTA ceramics were analyzed and determined.Based on the obtained dynamic mechanical properties parameters of ZTA ceramics,nu-merical simulation was conducted to study the influence of different impact velocities of projectiles and the stacking sequence of ZTA ceramics-ultra-high molecular weight polyethylene(UHMWPE)fiber composite structures on their penetration resistance behavior.The results show that the penetration resistance of ceramic-fiber composite structures is significantly improved compared to single ceramic targets.Under the condition of the same overall areal density,placing UHMWPE fiber laminates on the back surface of the target body achieves the best penetration re-sistance performance of the composite target.Placing the fiber laminates on the front surface significantly reduces penetration depth and damage radius.
NETL
NSTL
万方数据
