Geometric modelling of polycrystalline materials: Laguerre tessellations and periodic semi-discrete optimal transport
Geometric modelling of polycrystalline materials: Laguerre tessellations and periodic semi-discrete optimal transport
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多晶材料的几何建模:拉盖尔镶嵌和周期性半离散最优输运
DOI:
10.1016/j.mechrescom.2022.104023
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发表时间:
2023
影响因子:
2.4
通讯作者:
Bourne D
中科院分区:
文献类型:
--
作者:
Bourne D
In this paper we describe a fast algorithm for generating periodic RVEs of polycrystalline materials. In particular, we use the damped Newton method from semi-discrete optimal transport theory to generate 3D periodic Laguerre tessellations (or power diagrams) with cells of given volumes. Complex, polydisperse RVEs with up to 100,000 grains of prescribed volumes can be created in a few minutes on a standard laptop. The damped Newton method relies on the Hessian of the objective function, which we derive by extending recent results in semi-discrete optimal transport theory to the periodic setting.
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