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

表1 损伤理论模型中的参数

Table 1 Parameters in the present damage model

ε˙ / s-1 R0 / nm pg0 / GPa γ / (J·m-2) n K1 / GPa K2 / GPa η / (Pa·s) 3.0 × 106 1.868 0.632 0.59 4.6 51 130 0.03 3.0 × 107 1.868 0.632 0.59 4.6 51 130 0.006 3.0 × 108 1.868 0.632 0.59 4.6 51 130 0.0025 3.0 × 109 1.868 0.632 0.59 4.6 51 130 0.0012