Temperature Analysis in the Fused Deposition Modeling Process

Zhou, Yong; Nyberg, Timo R.; Xiong, Gang; Liú, Dan

doi:10.1109/icisce.2016.150

Cited by 56 publications

(35 citation statements)

References 9 publications

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“…Previous modeling works have mostly focused on the thermal and thermo-mechanical behavior of the printed part, after the deposition of the material. Analytical and numerical thermal models have been developed to compute the local temperature history of the printed strand, using lumped capacitance analysis [6][7][8][9][10][11][12][13]. Thermal models have further been coupled to a sintering model [14] (driven by the capillary forces) and healing models [12,15,16] (driven by the intermolecular diffusion), to predict the local bond formation between adjoining strands.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Numerical modeling of the strand deposition flow in extrusion-based additive manufacturing

Comminal

Serdeczny

Pedersen

et al. 2018

Additive Manufacturing

139

130

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Simulations of the material deposition in extrusion-based additive manufacturing Prediction of the strand cross-section as function of the processing parameters Negative linear relationship between the printing force and the printing speed Abstract We propose a numerical model to simulate the extrusion of a strand of semi-molten material on a moving substrate, within the computation fluid dynamics paradigm. According to the literature, the deposition flow of the strands has an impact on the inter-layer bond formation in extrusion-based additive manufacturing, as well as the surface roughness of the fabricated part. Under the assumptions of an isothermal Newtonian fluid and a creeping laminar flow, the deposition flow is controlled by two parameters: the gap distance between the extrusion nozzle and the substrate, and the velocity ratio of the substrate to the average velocity of the flow inside the nozzle. The numerical simulation fully resolves the deposition flow and provides the cross-section of the printed strand. For the first time, we have quantified the effect of the gap distance and the velocity ratio on the size and the shape of the strand. The cross-section of the strand ranges from being almost cylindrical (for a fast printing and with a large gap) to a flat cuboid with rounded edges (for a slow printing and with a small gap), which substantially differs from the idealized cross-section typically assumed in the literature. Finally, we found that the printing force applied by the extruded material on the substrate has a negative linear relationship with the velocity ratio, for a constant gap.

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Section: Accepted Manuscriptmentioning

confidence: 99%

Numerical modeling of the strand deposition flow in extrusion-based additive manufacturing

Comminal

Serdeczny

Pedersen

et al. 2018

Additive Manufacturing

139

130

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“…Previous research has agreed that lower travel and extrusion velocities yield better build qualities within FFF processes, lower print temperatures can also help with the distortion of FFF depositions [35]. Zhou et al conclude in their 2017 paper on thermal behaviour of PLA in FFF; "reducing extrusion temperature, slowing printing speed, and decreasing layer thickness could help to reduce the vertical distortion and residual thermal stress" [36].…”

Section: Controlling Under/over Extrusionmentioning

confidence: 99%

A method for predicting geometric characteristics of polymer deposition during fused-filament-fabrication

Hebda

McIlroy

Whiteside

et al. 2019

Additive Manufacturing

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In recent years 3D printing has gained popularity amongst industry professionals and hobbyists alike, with many new types of Fused Filament Fabrication (FFF) apparatus types becoming available on the market. A massively overlooked component of FFF is the requirement for a simple method to calculate the geometries of polymer depositions extruded during the FFF process. Manufacturers have so far achieved adequate methods to calculate tool-paths through so called slicer software packages which calculate the required velocities of extrusion from prior knowledge and data. Presented here is a method for obtaining a series of equations for predicting height, width and cross-sectional area values for given processing parameters within the FFF process for initial laydown on to a glass surface.

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“…El Moumen et al [43] discussed a 3D thermomechanical model that simulates the 3D printing process using FEA. Zhou et al [44] described a finite element based on element activation to model the thermal history of a 3D-printed part. Zhou et al [45] described a voxelization-based finite element simulation to simulate the thermal history of 3D-printed parts.…”

Section: Introductionmentioning

confidence: 99%

Discrete-Event Simulation Thermal Model for Extrusion-Based Additive Manufacturing of PLA and ABS

Bhandari

Lopez-Anido

2020

Materials

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The material properties of thermoplastic polymer parts manufactured by the extrusion-based additive manufacturing process are highly dependent on the thermal history. Different numerical models have been proposed to simulate the thermal history of a 3D-printed part. However, they are limited due to limited geometric applicability; low accuracy; or high computational demand. Can the time–temperature history of a 3D-printed part be simulated by a computationally less demanding, fast numerical model without losing accuracy? This paper describes the numerical implementation of a simplified discrete-event simulation model that offers accuracy comparable to a finite element model but is faster by two orders of magnitude. Two polymer systems with distinct thermal properties were selected to highlight differences in the simulation of the orthotropic response and the temperature-dependent material properties. The time–temperature histories from the numerical model were compared to the time–temperature histories from a conventional finite element model and were found to match closely. The proposed highly parallel numerical model was approximately 300–500 times faster in simulating thermal history compared to the conventional finite element model. The model would enable designers to compare the effects of several printing parameters for specific 3D-printed parts and select the most suitable parameters for the part.

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Temperature Analysis in the Fused Deposition Modeling Process

Cited by 56 publications

References 9 publications

Numerical modeling of the strand deposition flow in extrusion-based additive manufacturing

Numerical modeling of the strand deposition flow in extrusion-based additive manufacturing

A method for predicting geometric characteristics of polymer deposition during fused-filament-fabrication

Discrete-Event Simulation Thermal Model for Extrusion-Based Additive Manufacturing of PLA and ABS

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