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利用非线性有限元软件ANSYS/LS-DYNA对Zr41.2Ti13.8Cu12.5Ni10Be22.5非晶合金颗粒在几种撞击条件下的破碎行为进行了模拟研究,计算了颗粒失效破碎的临界速度,为非晶合金气流粉碎工艺提供参考。结果表明,尺寸20μm的颗粒撞击碳化硅基板与撞击钢基板时所需的破碎速度接近,但前者颗粒只在其接触区域附近发生少量局部破碎,后者颗粒沿撞击轴向断裂。尺寸20μm的颗粒之间碰撞时所需的相对破碎速度约为341 m/s;被撞颗粒尺寸固定时,临界破碎速度随撞击颗粒尺寸增加先增加,在两颗粒尺寸相同时达到最大值,然后再减小;尺寸不同的两个颗粒撞击时小颗粒破碎比大颗粒严重;颗粒之间撞击破碎效果又好于颗粒与基板撞击。
The fracture behavior of Zr41.2Ti13.8Cu12.5Ni10Be22.5 amorphous alloy under several impact conditions was simulated by the nonlinear finite element software ANSYS / LS-DYNA. The critical velocity of particle failure failure was calculated. Crystalline alloy air flow crushing process to provide a reference. The results show that the particle size of 20μm collides with the silicon carbide substrate and impinges on the steel substrate, the required breaking speed is close. However, the former only has a small amount of local fragmentation in the vicinity of the contact area, while the latter breaks along the axial direction. When the size of the colliding particle is fixed, the critical breaking velocity increases first with the size of the colliding particle and reaches the maximum when the size of the two particles is the same, and then reaches the maximum when the size of the colliding particle is the same And then decreased; two particles of different size when the impact of small particles crushing than the larger particles; crushing effect between the particles better than the impact of particles and the substrate.