Smoothed particle hydrodynamics for cohesive grains
Smoothed particle hydrodynamics for cohesive grains
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DOI：
10.1016/s0045-7825(99)00054-7
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发表时间：
1999-11
影响因子：
7.2
通讯作者：
L. Oger;S. Savage
中科院分区：
文献类型：
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作者：
L. Oger;S. Savage
在光滑粒子流体动力学（SPH）框架下，实现了基于Mohr-Coulomb屈服准则的粘性材料流变学。我们加强了经典的SPH方法，通过使用一些保守的重整化技术和一个新的平滑核，提高了稳定性的代码附近的不连续性。我们采用这种方法来模拟破碎的冰场漂浮在水面上，并在风力的影响下移动。当碎冰场被视为一个连续体时，它们的流变行为可以用一种称为粘塑性的模型来描述。冰场被建模为一个非常小的应变率的粘性流体，并假设塑性流动，否则。在塑性区的应力状态描述的莫尔-库仑屈服准则。
A rheology based on the Mohr–Coulomb yield criterion for cohesive materials is implemented in the framework of Smoothed Particle Hydrodynamics (SPH). We enhance the classical SPH approaches by using some conservative renormalization techniques and a new smoothing kernel which improves the stability of the code near discontinuities. We apply this approach to the simulation of broken-ice fields floating on the water surface and moving under the effect of wind forces. When broken-ice fields are regarded as a continuum, their rheological behavior can be described by a model known as viscous-plastic. The ice field is modeled as a viscous fluid for very small strain rates and is assumed to flow plastically otherwise. In the plastic regime the stress states are described in terms of the Mohr–Coulomb yield criterion.