Raster angle mechanics in fused deposition modelling
Raster angle mechanics in fused deposition modelling
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DOI：
10.1177/0021998313519153
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发表时间：
2015-02-01
影响因子：
2.9
通讯作者：
Singamneni, Sarat
中科院分区：
文献类型：
--
作者：
Huang, Bin;Singamneni, Sarat
熔融沉积成型是一种将半固态聚合物材料逐行沉积，直接从计算机辅助设计(CAD)模型构造三维物体的添加制造工艺。附加制造固有的好处允许在具体应用中与其他传统方法进行有效竞争，这一过程引起了充分的研究关注。材料沉积的性质和固态烧结的机理导致了不同程度的层间和层间结合，从而形成了散布在基材基质中的空洞的复合结构。虽然还有其他参数，但特别是栅格角度对所产生的细观结构有直接影响，并且与道路间结合的速度一起在影响所生产部件的机械特性方面起着重要作用。过去曾进行过实验和分析尝试，以评估栅格角度取向的作用，但最终得到的材料属性被认为是基础材料的属性。目前研究的假设是，熔融沉积模型产生的机械性能是结构敏感的。建立了实验和分析模型来检验这一假说，结果表明这一假说是正确的。
Fused deposition modelling is one of the additive manufacturing processes in which a semi-solid polymer material is deposited line-by-line to construct 3D objects direct from computer aided design (CAD) models. Benefits inherent with additively manufacturing allowed effective competition with other traditional methods in specific applications and the process drew sufficient research attention. The nature of material deposition and the mechanics of solid state sintering lead to varying levels of inter-road and inter-layer bonding resulting in a composite structure of voids interspersed in the base material matrix. While there are other parameters also, the raster angle in particular has a direct bearing on the resulting meso-structure and together with the rate of inter-road coalescence plays a significant role in influencing the mechanical characteristics of parts produced. Experimental and analytical attempts were made in the past to evaluate the role of raster angle orientation, but the resulting material properties were taken to be those of the base material. The hypothesis for the current research is that the mechanical properties resulting from fused deposition modelling are structure-sensitive. Experimental and analytical models are developed to test this hypothesis and the results indicate the hypothesis to be true.