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

Bhandari, Sunil; Lopez-Anido, Roberto

doi:10.3390/ma13214985

Cited by 16 publications

(11 citation statements)

References 58 publications

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“…The mathematical models that were established by Bellini et al explain the pressure decrease in the extruder head [ 25 , 36 ], on the basis of which the volume of the extruded material was investigated. On this basis, in the case of increased printed speed, the extraction force is growing, and the extruded material’s temperature is decreasing [ 37 ]. The interlaminar failures are essentially influenced by this phenomenon.…”

Section: Methodsmentioning

confidence: 99%

The Investigation of Interlaminar Failures Caused by Production Parameters in Case of Additive Manufactured Polymers

2021

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The use of three-dimensional (3D) printing technologies is an ever-growing solution. The product realized in many cases is applicable not only for visual aid, or model, but for tool, or operating element, or as an implant for medical use. For correct calculation, a proper model that is based on the theory of elasticity is necessary. The basis of this kind of model is the knowledge of the exact material properties. The PLA filament has been used to perform this study for matrix material. Our presumption is that the different layers do not fuse completely, and they do not fill up the space available. The failures between the layers and the deposited filaments and the layer arrangement could be the reason for the direction-dependent material properties of the 3D printed objects. Based on our investigation, we can conclude that the increase of the layer thickness and printing speed adversely affect the mechanical properties of the product.

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Section: Methodsmentioning

confidence: 99%

The Investigation of Interlaminar Failures Caused by Production Parameters in Case of Additive Manufactured Polymers

2021

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“…A numerical interpretation of the material deposition is achieved in FEM-softwares, via an automated element activation which translates to an event series input in time and space. Such event series modules can be utilized to prescribe the printing trajectory and process parameters such as printing speed and material deposition [6,7]. The finite element analysis have to consider that the material properties of concrete vary with time and additional process parameters such as interlayer waiting times also influence the final simulation results and must therefore be integrated into the analysis.…”

Section: Introductionmentioning

confidence: 99%

Implementation of a surrogate model for a novel path‐based finite element simulation for additive manufacturing processes in construction

Ekanayaka

Hürkamp

2023

Proc Appl Math and Mech

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Additive manufacturing in large-scale construction is an ongoing research topic that shows significant potential to overcome the challenges in terms of efficient material usage and process automation in construction. A large challenge in deposition based additive manufacturing processes of concrete material is to ensure the structural stability while printing. Due to the weak material properties of the fresh concrete, it has to be ensured that during the printing process the not fully cured printed structure is able to carry its own weight. This requires process stabilization and a proper process control to prevent a collapse of the structure. Therefore, a numerical model of the printing process that takes into account the time dependent material behavior of the applied concrete as well as the printing path and the process parameters is necessary to support the process planning. Within the framework of project B04 of the collaborative research center TRR277 -Additive Manufacturing in Construction, a novel path-based finite element simulation was developed in which the simulated geometry is constructed directly from the printing trajectory. Additionally, this approach allows the time-dependent material properties of fresh concrete to be modeled directly and efficiently into the mesh of the printed structure. Since the computation of large scale printing processes with finite element simulations is quite expensive, there exists a need for a much faster computational model. In this contribution, the implementation of a surrogate model based on a neural network and its deployment to optimize the interlayer waiting time is presented.

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“…Numerical simulation is another method for evaluating the temperature in the FFF process. Simulating temperature in the FFF three-dimensional (3D) printing process is essential for achieving high-quality prints, repeatability, process control and failure prediction (Bhandari and Lopez-Anido, 2020). It is a cost-effective and ideal method that can calculate the temperature of each point at any time.…”

Section: Introductionmentioning

confidence: 99%

Simulation of temperature profile in fused filament fabrication 3D printing method

Mosleh,

Esfandeh,

Dariushi

2023

RPJ

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Purpose Temperature is a critical factor in the fused filament fabrication (FFF) process, which affects the flow behavior and adhesion of the melted filament and the mechanical properties of the final object. Therefore, modeling and predicting temperature in FFF is crucial for achieving high-quality prints, repeatability, process control and failure prediction. This study aims to investigate the melt deposition and temperature profile in FFF both numerically and experimentally using different Acrylonitrile Butadiene Styrene single-strand specimens. The process parameters, including layer thickness, nozzle temperature and build platform temperature, were varied. Design/methodology/approach COMSOL Multiphysics software was used to perform numerical simulations of fluid flow and heat transfer for the printed strands. The polymer melt/air interface was tracked using the coupling of continuity equation, equation of motion and the level set equation, and the heat transfer equation was used to simulate the temperature distribution in the deposited strand. Findings The numerical results show that increasing the nozzle temperature or layer thickness leads to an increase in temperature at points close to the nozzle, but the bed temperature is the main determinant of the overall layer temperature in low-thickness strands. The experimental temperature profile of the deposited strand was measured using an infrared (IR) thermal imager to validate the numerical results. The comparison between simulation and observed temperature at different points showed that the numerical model accurately predicts heat transfer in the three-dimensional (3D) printing of a single-strand under different conditions. Finally, a parametric analysis was performed to investigate the effect of selected parameters on the thermal history of the printed strand. Originality/value The numerical results show that increasing the nozzle temperature or layer thickness leads to an increase in temperature at points close to the nozzle, but the bed temperature is the main determinant of the overall layer temperature in low-thickness strands. The experimental temperature profile of the deposited strand was measured using an IR thermal imager to validate the numerical results. The comparison between simulation and observed temperature at different points showed that the numerical model accurately predicts heat transfer in the 3D printing of a single-strand under different conditions. Finally, a parametric analysis was performed to investigate the effect of selected parameters on the thermal history of the printed strand.

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

Cited by 16 publications

References 58 publications

The Investigation of Interlaminar Failures Caused by Production Parameters in Case of Additive Manufactured Polymers

The Investigation of Interlaminar Failures Caused by Production Parameters in Case of Additive Manufactured Polymers

Implementation of a surrogate model for a novel path‐based finite element simulation for additive manufacturing processes in construction

Simulation of temperature profile in fused filament fabrication 3D printing method

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