resumo
In fused deposition modeling (FDM), the cooling history impacts the bonding between filaments and layers. The existence of thermal gradients can cause non-homogeneous properties and localized stress points that may affect the individual filaments, resulting in distortion and detachment. Thermal analysis can aid in understanding the manufacturing flaw, providing necessary tools for the optimization of the printing trajectory. The present work is intended to deepen understanding of the thermal phenomena occurring during the extrusion of polymeric materials, aiming at more efficient three-dimensional (3D) printing methods. A one-dimensional (1D) finite differential method was implemented using MATLAB to simulate the temperature evolution of an extruded filament, and the results were compared with two-dimensional (2D) COMSOL Multiphysics simulations, and experimentally validated using infrared thermography. Acrylonitrile-butadiene-styrene (ABS) was used as a test material. The energy dissipation includes forced convection and radiation heat losses to the surrounding medium.
palavras-chave
RESOLVED NUMERICAL SIMULATIONS; RESIDUAL-STRESSES; QUALITY
categoria
Engineering; Materials Science
autores
Santos, T; Belbut, M; Amaral, J; Amaral, V; Ferreira, N; Alves, N; Pascoal-Faria, P
nossos autores
João Cunha de Sequeira Amaral
Investigador Auxiliar
Tiago André César dos Santos
Bolseiro de pós-Doutoramento
Vitor Brás Sequeira Amaral
Professor CatedráticoProjectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
agradecimentos
This work was financially supported by the Fundacao para a Ciencia e a Tecnologia FCT/MCTES (PIDDAC) through the following projects: UIDB/04044/2020 and UIDP/04044/2020; Associate Laboratory ARISE LA/P/0112/2020; PAMI-ROTEIRO/0328/2013 (No 022158); FCT projects Stimuli2BioScaffold (PTDC/EMESIS/32554/2017), OptiBioScaffold (PTDC/EMESIS/4446/2020) MATIS (CENTRO-01-0145-FEDER-000014-3362); and projects of the CICECO-Aveiro Institute of Materials (UIDB/50011/2020, UIDP/50011/2020 and LA/P/0006/2020), financed by national funds through the FCT/MCTES (PIDDAC).