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SIMULATIONS OF BRITTLE SOLIDS USING SMOOTH PARTICLE HYDRODYNAMICS

机译:光滑颗粒水动力学模拟脆性固体

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摘要

We describe a version of the smooth particle hydrodynamics (SPH) method suitable for modeling solids. The model includes strength and implements a von Mises yielding relation for stresses beyond the Hugoniot elastic limit. At lower stresses associated with brittle failure we use a rate-dependent strength based on the nucleation and growth of explicit Weibull flaws. We illustrate the capabilities of our fracture model by examining the propagation of cracks in a simple tensile rod, and by comparing simulations with laboratory experiments for high speed impacts and cratering. [References: 21]
机译:我们描述了适用于对实体建模的光滑粒子流体动力学(SPH)方法的一种版本。该模型包括强度,并对超过Hugoniot弹性极限的应力实现了von Mises屈服关系。在与脆性破坏相关的较低应力下,我们使用基于速率的强度,该强度基于明显的威布尔缺陷的形核和生长。通过检查简单拉伸杆中裂纹的扩展,并通过将模拟与实验室实验的高速冲击和缩孔作比较,来说明断裂模型的功能。 [参考:21]

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