Powder bed generation in integrated modelling of additive layer manufacturing of orthopaedic implants
Powder bed generation in integrated modelling of additive layer manufacturing of orthopaedic implants
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DOI：
10.1007/s00170-016-8491-x
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发表时间：
2016-10-01
影响因子：
3.4
通讯作者：
Rainforth, W. Mark
中科院分区：
文献类型：
--
作者：
Krzyzanowski, Michal;Svyetlichnyy, Dmytro;Rainforth, W. Mark
本文介绍了一种在集成建模方法框架内开发的粉末床生成的原始模型，用于研究骨科植入物增材层制造（ALM）中物理机制的相互作用。该模型是基于元胞自动机（CA）的方法，并描述了在三维表面上的沉积过程中不同尺寸的移动粒子之间的关系。该表面由水平二维CA限定，颗粒落在该表面上并不可逆地粘附到生长的存款上。该模型允许考虑不同的重组情况下，粒子被允许旋转，直到实现一个局部最小位置。粉末床的堆积密度的变化已经研究了数值依赖于技术参数，如粒度分布，沉积速率和粉末沉积的顺序。该模型已开发的目的是合并到基于有限元（FE）的集成模型，适用于不同范围的材料，包括金属和非金属。
This paper presents an original model of powder bed generation developed within the frame of an integrated modelling approach for studying the interaction of physical mechanisms in additive layer manufacturing (ALM) of orthopaedic implants. The model is based on cellular automata (CA) approach and describes the relationship between moving particles of different sizes during deposition on a surface in three dimensions. The surface is defined by the horizontal two-dimensional CA on which particles fall and irreversibly stick to a growing deposit. The model allows for consideration of different restructuring cases when particles are allowed to rotate as often as necessary until achievement of a local minimum position. Changes in the packing density of the powder bed have been investigated numerically depending on technological parameters, such as particle size distribution, deposition rate and sequence of powder deposition. The model has been developed with the aim of merging to the finite element (FE)-based integrated model and is applicable to a different ranges of materials including metals and also non-metals.