论文标题
一种用于动态和动态后重结晶建模的新的前线跟踪拉格朗日模型
A new front-tracking Lagrangian model for the modeling of dynamic and post-dynamic recrystallization
论文作者
论文摘要
弗洛雷斯（Florez）等人在以前的作品（重组）中引入了一种新的模拟多域问题的方法。 （2020年），并在各向同性谷物生长（GG）的背景下并行发展，而没有考虑到由于位错引起的储存能量（SE）的影响。该方法包括一种新的前跟踪方法，其中一种原始性不仅是谷物之间的界面被离散化，而且它们的大部分也被网状啮合，并且域的拓扑变化是由在有限元（FE）网格上执行的选择性局部重新安排操作驱动的。在本文中，将介绍该模型的进一步发展和研究，主要是考虑到（GBM）SE的晶界迁移的模型的发展。将提出有关新晶粒成核的进一步发展，以模拟动态重结晶（DRX）和动力后重结晶（PDRX）现象。在Florez等人中，数值算法的准确性和性能非常有前途。 （2020）。在这里，将给出多个测试用例的结果，以验证考虑GG和SE的模型的准确性。将评估DRX和PDRX机制的计算性能，并将使用级别集合（LS）公式与经典有限元（FE）框架进行比较。
A new method for the simulation of evolving multi-domains problems has been introduced in previous works (RealIMotion), Florez et al. (2020) and further developed in parallel in the context of isotropic Grain Growth (GG) with no consideration for the effects of the Stored Energy (SE) due to dislocations. The methodology consists in a new front-tracking approach where one of the originality is that not only interfaces between grains are discretized but their bulks are also meshed and topological changes of the domains are driven by selective local remeshing operations performed on the Finite Element (FE) mesh. In this article, further developments and studies of the model will be presented, mainly on the development of a model taking into account grain boundary migration by (GBM) SE. Further developments for the nucleation of new grains will be presented, allowing to model Dynamic Recrystallization (DRX) and Post-Dynamic Recrystallization (PDRX) phenomena. The accuracy and the performance of the numerical algorithms have been proven to be very promising in Florez et al. (2020). Here the results for multiple test cases will be given in order to validate the accuracy of the model taking into account GG and SE. The computational performance will be evaluated for the DRX and PDRX mechanisms and compared to a classical Finite Element (FE) framework using a Level-Set (LS) formulation.
