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首页> 外文会议>International Conference on Advanced Materials Processing Technologies >NUMERICAL MODELING OF SOLID STATE SINTERING USING HETEROGENEOUS PACKING AND DIFFUSION PROCESSES
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NUMERICAL MODELING OF SOLID STATE SINTERING USING HETEROGENEOUS PACKING AND DIFFUSION PROCESSES

机译：使用异质包装和扩散过程固态烧结的数值模拟

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Physical modeling and computer simulation for the description of solid state low stresses sintering process have been performed. The first step consists in fitting heterogeneous particles together in a three dimensional virtual box, with shape and size distributions given as parameters. These particles are then submitted to gravity, contact boundary conditions, friction forces, and Van Der Waals interaction. Thus, one dispose of a realistic dense packing. Starting from size distribution and fitting parameters, it is then possible to obtain the same densities and the same configurations as those observed in the real case. The densification process is then simulated. The constitutive model is based on volume, surface, grain boundary and gaseous diffusion, using laws derived from local energetic considerations and avoiding strong hypothesis. This approach allows to validate work on sintering theory, based on particular cases or with unchecked assumptions. Important post-processing investigations let us to identify constants and pertinent options for the homogenization problem which will led us to a macroscopic description of the sintering process. The paper describes laws and algorithms used in the proposed modeling. Results are shown to illustrate solid state sintering of powder aggregates.
机译：用于对固态低应力的描述的物理建模和计算机模拟已经进行了低应力烧结过程。第一步骤包括在三维虚拟盒中拟合异构颗粒，其形状和尺寸分布作为参数。然后将这些颗粒提交到重力，接触边界条件，摩擦力和范德华相互作用。因此，一个待逼真的密集包装。从尺寸分布和拟合参数开始，然后可以获得与在实际情况中观察到的密度和相同的配置。然后模拟致密化过程。本构模型基于体积，表面，晶界和气态扩散，使用来自局部能量考虑的法律并避免强烈的假设。这种方法允许基于特定情况或未经检查的假设来验证烧结理论的工作。重要的后处理调查让我们识别常规化问题的常量和相关选项，这将导致我们对烧结过程的宏观描述。本文介绍了在拟议建模中使用的法律和算法。结果显示出说明粉末聚集体的固态烧结。

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