Toward the understanding of temperature effect on bonding strength, dimensions and geometry of 3D-printed parts
TypeArticles dans des revues avec comité de lecture
Abstract: Fused filament fabrication (FFF), which is an additive manufacturing technique, opens alternative possibilities for complex geometries fabrication. However, its use in functional products is limited due to anisotropic strength issues. Indeed, the strength of FFF fabricated parts across successive layers in the build direction (Z direction) can be significantly lower than the strength in X–Y directions. This strength weakness has been attributed to poor bonding between printed layers. This bonding depends on the temperature of the current layer being deposited—at melting temperature (Tm)—and the temperature of the previously deposited layer. It is assumed that depositing a layer at Tm on a layer at temperature around crystallization temperature (Tc) would enable higher material crystallinity and thus better bonding between previous and present layers. On the contrary, if the previous layer temperature is below Tc, material crystallinity will be low and bonding strength weak. This paper aims at studying the significant effect of temperature difference (ΔT) between previous and current deposited layers temperatures on (1) inter-layers bonding strength improvement and (2) part dimensions, geometry and structure stability. A 23% increase in the inter-layers bonding strength for previous layer temperature slightly higher than Tc reported here confirms the above assumption and offers a first solution toward the increase in inter-layers bonding strength in FFF.
Showing items related by title, author, creator and subject.
Influence of process parameters on thermal and mechanical properties of polylactic acid fabricated by fused filament fabrication VANAEI, Hamidreza; SHIRINBAYAN, Mohammadali; DELIGANT, Michael; RAISSI, Kaddour; FITOUSSI, Joseph; KHELLADI, Sofiane; TCHARKHTCHI, Abbas (Wiley, 2020)Fused filament fabrication is considered one of the most used processes in additive manufacturing rapid prototypes out of polymeric material. Poor strength of the deposited layers is still one of the main critical problems ...
VANAEI, Hamid Reza; SHIRINBAYAN, Mohammadali; COSTA, Sidonie Fernandes; DUARTE, Fernando Moura; COVAS, José António; DELIGANT, Michael; KHELLADI, Sofiane; TCHARKHTCHI, Abbas (Wiley, 2021)Fused filament fabrication (FFF) is an additive manufacturing technique that is used to produce prototypes and a gradually more important processing route to obtain final products. Due to the layer-by-layer deposition ...
HAMIDI, A; KHELLADI, Sofiane; ILLOUL, Lounès; SHIRINBAYAN, Mohammadali; BAKIR, Farid; TCHARKHTCHI, Abbas (ELSEVIER, 2015)Reactive Rotational Moulding (RRM) is the best process for producing large hollow plastic parts without weld lines. Constant quality in technical parts requires the process to be mastered by controlling on-line the main ...
HAMIDI, A.; KHELLADI, Sofiane; ILLOUL, A.; SHIRINBAYAN, Mohammadali; BAKIR, Farid; TCHARKHTCHI, Abbas (Springer, 2015)During Reactive Rotational Molding (RRM), it is very important to predict the fluid flow in order to obtain the piece with homogeneous shape and high quality. This prediction may be possible by simulation the fluid flow ...
TCHARKHTCHI, Abbas; ABDALLAH-ELHIRTSI, Sofiane; EBRAHIMI, Kambiz; FITOUSSI, Joseph; SHIRINBAYAN, Mohammadali; FARZANEH, Sedigheh (MDPI, 2014)In this study some new concepts regarding certain aspects related to shape memory polymers are presented. A blend of polylactic acid (PLA) (80%) and polybutylene succinate (PBS) (20%) was prepared first by extrusion, then ...