Purpose

This paper aims to provide an overview of the recent findings of the mechanical properties of parts manufactured by fused deposition modeling (FDM). FDM has become a widely used technique for the manufacturing of thermoplastic parts. The mechanical performance of these parts under service conditions is difficult to predict due to the large number of process parameters involved. The review summarizes the current knowledge about the process-property relationships for FDM-based three-dimensional printing.

Design/methodology/approach

The review first discusses the effect of material selection, including pure thermoplastics and polymer-matrix composites. Second, process parameters such as nozzle temperature, raster orientation and infill ratio are discussed. Mechanisms that these parameters affect the specimen morphology are explained, and the effect of each parameter on the strength of printed parts are systematically presented.

Findings

Mechanical properties of FDM-produced parts strongly depend on process parameters and are usually lower than injection-molded counterparts. There is a need to understand the effect of each parameter and any synergistic effects involved better.

Practical implications

Through the optimization of process parameters, FDM has the potential to produce parts with strength values matching those produced by conventional methods. Further work in the field will make the FDM process more suitable for the manufacturing of load-bearing components.

Originality/value

This paper presents a critical assessment of the current knowledge about the mechanical properties of FDM-produced parts and suggests future research directions.

中文翻译：

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通过熔融沉积建模生产的热塑性零件的机械性能：综述

目的

本文旨在概述通过熔融沉积建模（FDM）制造的零件的机械性能的最新发现。FDM已成为制造热塑性零件的一种广泛使用的技术。由于涉及大量的工艺参数，因此很难预测这些零件在使用条件下的机械性能。审查总结了有关基于FDM的三维打印的过程属性关系的当前知识。

设计/方法/方法

这篇综述首先讨论了材料选择的影响，包括纯热塑性塑料和聚合物基复合材料。其次，讨论了诸如喷嘴温度，光栅方向和填充率之类的工艺参数。解释了这些参数影响试样形态的机理，并系统地介绍了每个参数对印刷零件强度的影响。

发现

FDM生产的零件的机械性能在很大程度上取决于工艺参数，通常低于注塑成型的零件。有必要了解每个参数的效果，以及更好地涉及任何协同效果。

实际影响

通过优化工艺参数，FDM有潜力生产强度值与传统方法相匹配的零件。在该领域的进一步工作将使FDM工艺更适合于承重部件的制造。

创意/价值

本文对FDM生产零件的机械性能的当前知识进行了严格的评估，并提出了未来的研究方向。