Investigating the effect of printing speed and mode mixity on the fracture behavior of FDM-ABS specimens

Nabavi-Kivi, A.; Ayatollahi, M.R.; Rezaeian, Parham; Razavi, Seyed Mohammad Javad

doi:10.1016/j.tafmec.2021.103223

Cited by 26 publications

(19 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When AM-FFF ABS specimens are characterized, it is important to examine their fracture surface morphology in order to understand whether the experimental results match the expected fractographic theories [51]. The current fractographic analysis confirmed the presence of different types of expected discontinuities on the fracture surfaces, such as voids and air gaps [7], [13].…”

Section: Fractographysupporting

confidence: 57%

Mechanical Performance, Structure and Fractography of ABS Manufactured by the Fused Filament Fabrication Additive Manufacturing

Stern¹,

Rosenthal²,

Richkov³

et al. 2022

AWET

View full text Add to dashboard Cite

Fused filament fabrication (FFF) is the most widely used additive manufacturing (AM) technology for printing thermoplastic materials, among them the ABS. A significant problem of 3D-printed parts manufactured by AM-FFF is the anisotropy of their mechanical properties. Thus, it is of great importance to understand the impact of the build strategy of the mechanical properties and failure mechanisms of AM-FFF ABS components. This research aims, at least partly, to fill this gap by studying the structure and mechanical behavior by performing fracture surface analysis of AM-FFF ABS specimens under the three-point bend test. For this purpose, three build orientations (flat, on-edge and upright), each built at 0°/90° and -45°/+45° raster angles and oblique printed samples (0°, 15°, 30°, 45°, 60°, and 75°) built at -45°/+45° raster angles were prepared. The results revealed that the build direction with the lowest density, the flexural modulus of elasticity, flexural strength, and deflection was in the upright direction for both 0°/90° and -45°/+45° raster orientations. Overall, two main failure modes were observed for the tested specimens: (1) inter-layer/inter-raster bond failure, which is the main contributor to failure of all upright samples and (2) intra-layer/trans-raster failure, which is the main contributor to failure of flat and on-edge specimens printed at -45°/+45° raster orientation. The results of the oblique printed samples demonstrate that a single crack initiation can transform into a few inter-laminar and intra-laminar fracture surfaces due to competing stress fields and structural gradients

show abstract

Section: Fractographysupporting

confidence: 57%

Mechanical Performance, Structure and Fractography of ABS Manufactured by the Fused Filament Fabrication Additive Manufacturing

Stern¹,

Rosenthal²,

Richkov³

et al. 2022

AWET

View full text Add to dashboard Cite

show abstract

“…During this process, the filaments undergo a large amount of localized deformation, which results a rough failure surface, as shown in Figure 10. In the literature, the fracture surface of FDM-printed ABS of +45 • /−45 • orientation under mixed-mode (a combination of opening and shear loading) fracture conditions demonstrated fewer ridge markings on the broken filaments [27]. However, several ridge markings were noticed in this work on the failure surface of the specimens subjected to shear loading.…”

Section: Resultsmentioning

confidence: 44%

“…This was clearly evident from the shear stress-strain response that the shear flow stress increased as the shear strain increased, and the maximum shear stress happened at the end of the shear zone (shown in Figure 11) against other two raster orientations, except for a specimen of a shear angle of 20.83° for the +45°/−45° raster orientation. When the shear strength values shown in Figure 13 were compared with tensile strength values of the 0°/90° and +45°/−45° orientations, the shear strength for the shear angle of 0° was about 65% less than that of the tensile strength for both raster orientations [27,29]. Figure 14 provides the shear strain at the end of the shear zone for all shear angles and raster orientations.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Shear Angle and Printing Orientation on Shear Constitutive Response of Additively Manufactured Acrylonitrile Butadiene Styrene

Letizia

Chalivendra

2022

Polymers

View full text Add to dashboard Cite

An experimental investigation was performed to understand the quasi-static shear response of additively manufactured (AM) acrylonitrile butadiene styrene (ABS) via fusion deposition modeling (FDM). A modified flat hat-shaped (FHS) specimen configuration was used for shear testing. The main aim of this study was to investigate the effect of four different shear angles (0°, 5.44°, 13.39°, and 20.83°) and three printing orientations (vertical build, 0°/90°, and 45°/−45°) on the shear constitutive response and shear performance of FDM-printed ABS. Scanning electron microscopy images of the failure surface were used to explain the shear response of the material. The flow shear stress of the shear stress-strain response for vertically printed specimens demonstrated a monotonic increase up to a peak shear stress and then decrease at the end of the shear zone, while for 0°/90° specimens, an increasing trend until the peak value at the end of the shear zone was observed. With increasing shear angles, all specimens printed with three printing orientations exhibited increasing shear zone size and shear strength, and the 0°/90° specimens exhibited the highest shear strength for all four shear angles. However, the specimens of the 45°/−45° orientation demonstrated the highest increase in shear strength by about 60% and in the shear strain at the end of shear zone by about 175% as the shear angle was increased from 0° to 20.83°.

show abstract

“…Scientific literature clearly shows that mechanical properties of FDM parts are largely influenced by variable process parameters [6][7][8][9][10][11][12][13][14], such as printing speed, printing and build plate temperatures, density and pattern infill lines, layer height and layer width. These variables can be optimised to obtain the desired mechanical response, dimensional accuracy and part quality [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Influence of Thermal Annealing Temperatures on Powder Mould Effectiveness to Avoid Deformations in ABS and PLA 3D-Printed Parts

et al. 2022

View full text Add to dashboard Cite

Fused deposition modelling (FDM)-printed parts can be treated with various post-processes to improve their mechanical properties, dimensional accuracy and surface finish. Samples of polylactic acid (PLA) and acrylonitrile butadiene styrene (ABS) parts are treated with annealing to study a ceramic powder mould’s effectiveness in order to avoid dimensional part deformation. The variables chosen are annealing temperatures and the usage of a ceramic powder mould to avoid part deformations. A flexural strength test was carried out to evaluate the mould’s influence on the mechanical properties of the part. The effectiveness of the mould has been evaluated mainly attending to the length of the part, because this is the dimension most affected by deformation. A polynomial approximation to a deformation’s length and the effectiveness of the mould allows for their prediction. Results obtained show that effectiveness increases with the annealing temperature. Nevertheless, mould effectiveness decreases when parts are fabricated with PLA, because it is a semi-crystalline thermoplastic, and it suffers a lower shrinkage during thermal post-process than amorphous polymers such as ABS. Attending to the flexural strength test, mould has no significant influence on the mechanical properties of the treated parts in both materials studied.

show abstract

Investigating the effect of printing speed and mode mixity on the fracture behavior of FDM-ABS specimens

Cited by 26 publications

References 38 publications

Mechanical Performance, Structure and Fractography of ABS Manufactured by the Fused Filament Fabrication Additive Manufacturing

Mechanical Performance, Structure and Fractography of ABS Manufactured by the Fused Filament Fabrication Additive Manufacturing

Effect of Shear Angle and Printing Orientation on Shear Constitutive Response of Additively Manufactured Acrylonitrile Butadiene Styrene

Influence of Thermal Annealing Temperatures on Powder Mould Effectiveness to Avoid Deformations in ABS and PLA 3D-Printed Parts

Contact Info

Product

Resources

About