含He泡液态金属铝的动态拉伸断裂机制与损伤模型

周婷婷, 赵福祺, 周洪强, 张凤国, 殷建伟

Mechanism and Damage Model for the Dynamic Tensile Fracture of Liquid Aluminum Containing He Bubbles

ZHOU Tingting, ZHAO Fuqi, ZHOU Hongqiang, ZHANG Fengguo, YIN Jianwei

图3 应变率为3.0 × 108 s-1时含He泡铝样品在拉伸过程中的拉伸应力(P)、He泡半径(R)以及He泡内压(Pg)随时间的变化

Fig.3 Time (t) evolutions of tensile stress (P) (a), He bubble radius (R) (b), and the internal pressure of He bubble (Pg) (c) of Al-He sample during the dynamic tension process at ε˙ = 3.0 × 108 s-1 (In Fig.3b, the black curve represents the fast growth of He bubble and the blue curve shows the slower growth of He bubble; the same in Fig.6)