Linearization-based methods for the calibration of bonded-particle models
Linearization-based methods for the calibration of bonded-particle models
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DOI：
10.1007/s40571-020-00348-z
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发表时间：
2020-07-25
影响因子：
3.3
通讯作者：
Dosta, Maksym
中科院分区：
文献类型：
--
作者：
Jarolin, Kolja;Dosta, Maksym
在当前的工作中，提出了两种校准粘合粒子模型（BPM）弹性材料参数的方法。这些方法基于经典力学的概念，与传统的试错策略相比，能够实现更快的校准。此外，它们还可用于反检验 BPM 的一致性。在第一种方法中，数学模型被线性化并以类似于有限元方案的经典矩阵向量公式求解。第二种方法中的进一步线性化可以直接计算弹性刚度张量，从而大大降低计算成本。为了分析这两种方法的能力和局限性，我们将它们应用于三个不同的案例研究。获得的结果表明，新策略使我们能够显着减少计算时间。
In the work at hand, two methods for the calibration of the elastic material parameters of bonded-particle models (BPMs) are proposed. These methods are based on concepts of classical mechanics and enable a faster calibration compared to the conventional trial and error strategy. Moreover, they can be used to counter-check the consistency of the BPM. In the first method, the mathematical model is linearized and solved in a classical matrix-vector formulation similar to a finite element scheme. Further linearization in the second approach enables the direct calculation of the elastic stiffness tensor, reducing computational costs massively. To analyze the capabilities and limitations of both methods, they have been applied in three different case studies. Obtained results have shown that the new strategy allows us to significantly reduce the calculation time.