I. B. Petrov, E. K. Guseva, V. I. Golubev, V. P. Epifanov
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引用次数: 0
摘要
冰是一种复杂的异质介质。它的行为取决于许多因素,并在不同的过程中发生变化。因此,确定正确流变模型的问题仍未解决。在这项研究中,考虑了球状冲击器对冰的低速冲击。研究的重点是根据实验室实验的计算机模拟,开发正确选择模型的方法。模拟使用了以下流变模型:各向同性线性弹性模型、具有 von Mises 和 von Mises-Schleicher 屈服准则的弹塑性模型、具有弹塑性包含物的弹性模型。采用网格特征法求解支配方程系统。根据球的速度和球浸入冰层的深度对模型进行比较。研究了模型参数对结果的影响。结果,选择了重建解接近实验结果的参数。
Ice rheology exploration based on numerical simulation of low-speed impact
Ice is a complex heterogeneous medium. Its behavior depends on many factors and changes in different processes. Thus, the problem of the determination of the correct rheological model is still unsolved. In this work low-speed impact on ice by the ball striker is considered. The main focus of the research is the development of the method of the correct model selection based on the computer simulation of the laboratory experiment. The simulation was conducted using the following rheology models: isotropic linear elasticity model, elastoplasticity model with the von Mises and the von Mises-Schleicher yield criteria, elasticity model with elastoplastic inclusion. The governing system of equations is solved using grid-characteristic method. Models’ comparison is performed based on the ball’s velocity and depth of ball’s immersion into the ice. The model parameters’ influence on the results is surveyed. As a result, the parameters that reconstruct the solution close to the experimental results are chosen.