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Abstract(s)
Este estudo investiga a resistência mecânica de peças impressas em 3D com diferentes padrões de preenchimento e com estrutura otimizada topologicamente, visando redução de massa. A manufatura aditiva, especialmente por FDM (Modelagem por Fusão e Deposição), vem ganhando relevância em setores industriais e residenciais, permitindo a produção de peças complexas e funcionais. O trabalho compara amostras impressas em padrões convencionais (grid e triangular) e otimizações topológicas, realizadas no software SolidWorks. Foram avaliadas diversas configurações de malha e simetria, além da influência de uma parede externa na resistência mecânica das peças. Os ensaios de compressão revelaram todas as
amostras superaram a carga de 2kN para as quais foram dimensionadas. Também mostrou que os preenchimentos convencionais superaram os otimizados em até 61,9%, sugerindo que a distribuição não uniforme de massa nos modelos otimizados impacta negativamente a capacidade de carga. Amostras com parede externa, especialmente no padrão grid com uma única parede, demonstraram maior resistência
devido à amarração estrutural superando em 11,9% a amostra grid sem a presença de parede. Todas as amostras apresentaram um comportamento de fratura frágil, sendo a otimizada com parede mantida a única na qual se observou uma pequena deformação plástica. Por fim foi realizada uma análise de variância (ANOVA), que confirmou diferenças estatisticamente significativas entre as amostras exceto nas comparações entre as otimizadas topologicamente sem parede e uma única parede e o padrão grid e triangular com parede.
This study investigates the mechanical strength of 3D printed parts with different filling patterns and a topologically optimized structure, with the aim of reducing mass. Additive manufacturing, especially FDM (Fusion Deposition Modeling), has been gaining relevance in industrial and residential sectors, enabling the production of complex and functional parts. The work compares samples printed in conventional patterns (grid and triangular) and topological optimizations made in SolidWorks software. Various mesh and symmetry configurations were evaluated, as well as the influence of an external wall on the mechanical strength of the parts. The compression tests showed that all the samples exceeded the 2kN load for which they were designed. It also showed that the conventional fillings exceeded the optimized ones by up to 61.9%, suggesting that the non-uniform distribution of mass in the optimized models negatively impacts the load capacity. Samples with an external wall, especially in the grid pattern with a single wall, showed greater resistance due to structural binding, outperforming the grid sample without a wall by 11.9%. All the samples showed brittle fracture behaviour, with the optimized one with a maintained wall being the only one in which a small plastic deformation was observed. Finally, an analysis of variance (ANOVA) was carried out, which confirmed statistically significant differences between the samples except in the comparisons between the topologically optimized ones without a wall and a single wall and the grid and triangular pattern with a wall.
This study investigates the mechanical strength of 3D printed parts with different filling patterns and a topologically optimized structure, with the aim of reducing mass. Additive manufacturing, especially FDM (Fusion Deposition Modeling), has been gaining relevance in industrial and residential sectors, enabling the production of complex and functional parts. The work compares samples printed in conventional patterns (grid and triangular) and topological optimizations made in SolidWorks software. Various mesh and symmetry configurations were evaluated, as well as the influence of an external wall on the mechanical strength of the parts. The compression tests showed that all the samples exceeded the 2kN load for which they were designed. It also showed that the conventional fillings exceeded the optimized ones by up to 61.9%, suggesting that the non-uniform distribution of mass in the optimized models negatively impacts the load capacity. Samples with an external wall, especially in the grid pattern with a single wall, showed greater resistance due to structural binding, outperforming the grid sample without a wall by 11.9%. All the samples showed brittle fracture behaviour, with the optimized one with a maintained wall being the only one in which a small plastic deformation was observed. Finally, an analysis of variance (ANOVA) was carried out, which confirmed statistically significant differences between the samples except in the comparisons between the topologically optimized ones without a wall and a single wall and the grid and triangular pattern with a wall.
Description
Mestrado de dupla diplomação com a UTFPR - Universidade Tecnológica Federal do Paraná
Keywords
Manufatura aditiva Otimização topológica Impressão 3D e preenchimento