Simulation of Powder Behaviour during Compaction Based on Continuum and Discrete Modeling
Simulation of Powder Behaviour during Compaction Based on Continuum and Discrete Modeling
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基于连续和离散建模的粉末压实过程行为模拟
DOI：
10.4131/jshpreview.8.260
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
P. Mosbah
中科院分区：
文献类型：
--
作者：
S. Shima;H. Kotera;P. Mosbah
在粉末成形工艺中，粉末在压制过程中的行为，如密度增加的机理、密度分布、各向异性的演变、等静压压制中压坯的形状等，对产品的质量、尺寸和几何精度以及材料消耗都有重要影响。此外，已在室温下压实的压坯经受烧结过程;它们在该过程期间经历尺寸和几何变化;这些受到先前的压实过程和密度分布的影响。近年来，对产品尺寸和形状精度的要求不断提高。因此，粉末压制行为的模拟对于近净成形生产具有重要意义。为了模拟粉末或颗粒材料的行为，有两种方法：一种是基于连续介质力学处理粉末，另一种是观察单个颗粒的运动。在这篇文章中，我们将概述这两种类型的模拟的最新技术水平。
In powder forming processes, the behaviour of powders during compaction, such as the mechanisms of density increase, density distribution, evolution of anisotropy, the shape of compacts in isostatic compaction, etc. significantly influence the quality of the products, dimensional and geometrical accuracy and material consumption. Further, the compacts that have been compacted at room temperature are subject to a sintering process; they undergo dimensional and geometrical change during the process; these are affected by the previous compaction process and density distribution. In recent years, the demand has been increasing for accuracy in the dimensions and shapes of products. Simulation of compaction behaviour of powders is, thus, of great importance for near net shape production. To simulate the behaviours of powders or granular materials, there are two approaches: one is to treat the powder based on continuum mechanics, and the other is to observe the movement of individual particles. In this article, we shall overview the state of the art regarding both types of simulation.