## 1 Introduction  
Additive manufacturing (AM) is a layer-by-layer building technique that allows complex shapes to be obtained without the use of a mold. AM is a promising area for manufacturing of components from prototypes to functional structures. The application of AM covers different sectors such as aerospace, automotive, semiconductor and biomedical applications. Fused filament fabrication (FFF), also known as fused deposition modeling (FDMTM), is one of the most popular AM techniques. FDMTM is based on the melting of a thermoplastic filament that is laid on a platform to create each layer on top of the other. The FDMTM process is controlled by many parameters which range from material type to several machine settings such as the nozzle diameter and temperature, printing speed, feed rate, bed temperature, raster angle and width [1]. Several detailed studies are reported in the literature about the influence of the printing settings on the mechanical properties of 3D-printed parts. [PERSON] et al. [2] showed that polymer chain alignment occurs during the filament deposition. As a result, the tensile, flexural and impact resistance varies with different raster orientations. Similar results were obtained by [PERSON] et al. [3]. In their study, the effects of the raster orientation, air gap, bead width, color and model temperature parameters on the tensile strength were evaluated. Results showed that the air gap and raster orientation influence the tensile strength; conversely, the bead width, model temperature and color do not have a significant effect. In another study, [PERSON] et al. [4] concluded that the layer thickness, the raster angle and the air gap influence the elastic performance of 3D-printed ABS (Acrylonitrile Butadiene Styrene) Parts. The ASTM D638 tensile test and the ASTM D790 or ISO 178 flexural test are both widely used standards for testing polymeric materials processed by injection or compression molding. Thus, practitioners might be interested in extending their implementation to the characterization of the mechanical properties of FDMM printed parts. Unfortunately, these standards do not account for the presence of voids that are unavoidable in FDMM. In addition, they were not specifically developed to characterize the interlayer bonding which influences the mesostructures of FDMM printed parts. [PERSON] et al. [5] showed that voids found in FDMM printed parts significantly impact the tensile properties. According to [PERSON] et al. [6], the chamber temperature and variations in the convection coefficient have a strong effect on the cooling temperature profiles, as well as on the mesostructure and overall quality of the bonding between filaments. However, they did not measure the interlayer strength since the performed flexural tests yielded large variation in the results. Only a few papers in the AM literature have been focused on the study of the bonding quality between layers and rasters printed by FDMM. Recently, interlaminar bonding has been measured by using the short-beam strength (SBS) test. This test is commonly used for fiber reinforced composites [7; 8; 9; 10]. A study of the interlaminar bonding performance of continuous fiber reinforced thermoplastics printed by FDMM showed a correlation between porosity and the interlaminar shear strength (ILSS) [7]. [PERSON] [9] confirmed these findings working with similar materials. In a recent paper, SBS tests indicated improved sensitivity to measure interlaminar bonding effects for different materials compared to tensile or flexural tests [10]. However, all these papers lacked in terms of the statistical analysis of the measured data. Some research tried to rationalize the results of mechanical testing using the design of experiment (DoE) toolbox of statistical techniques [3; 11; 12; 13; 14; 15]. [PERSON] et al. [15] showed that the interlayer cooling time can influence the ultimate tensile strength (UTS) because of different bonding properties between the layers.