One of the polymer additive manufacturing processes commonly used today is fused deposition modelling (FDM). FDM is the process of manufacturing three-dimensional structure through the use of a layer-by-layer printing of the polymer filament. Due to the anisotropic nature of FDM parts, the orientation of the rasters and the build orientation have an effect on the mechanical properties of a part. This study evaluates the fracture toughness of FDM solid-build specimens manufactured from Ultem 1010. The effects of build orientation and raster orientation were investigated through the use of a full-factorial design of experiments. The fracture toughness was obtained using single-edge notch bend test for a range of build orientations and rasters typically used in the FDM process. The design of experiments uses the results of the single-edge notch bend test to determine the significance the factors, build orientation and raster angle, have on the response variable, conditional critical stress intensity factor. Ultem 1010 parts were also microscopically examined to understand the primary failure mode around the rasters. The primary results of this study include the relationship of the build parameters to each other and to the fracture toughness of Ultem 1010.

当今常用的聚合物添加剂制造工艺之一是熔融沉积建模（FDM）。FDM是通过使用聚合物细丝的逐层印刷来制造三维结构的过程。由于FDM零件的各向异性，栅格的方向和构建方向会影响零件的机械性能。这项研究评估了Ultem 1010制成的FDM固体构建标本的断裂韧性。通过使用全要素实验设计，研究了构建方向和栅格方向的影响。断裂韧性是通过单边切口弯曲测试获得的，该测试针对FDM工艺中通常使用的一系列构造方向和栅格。实验的设计使用单边切口弯曲试验的结果来确定影响因素，构造方向和光栅角度，对响应变量，条件临界应力强度因素的影响因素。还用显微镜检查了Ultem 1010零件，以了解栅格周围的主要故障模式。这项研究的主要结果包括构建参数之间的关系以及Ultem 1010的断裂韧性。