Banca de QUALIFICAÇÃO: TAYNNARA MENDES VELOSO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : TAYNNARA MENDES VELOSO
DATE: 03/12/2025
TIME: 08:30
LOCAL: Sala de reuniões do Lime
TITLE:

Investigation of the influence of infill patterns on tensile strength of PLA samples produced by additive manufacturing

KEY WORDS:

3D printing; PLA; tensile strength; infill patterns.

PAGES: 47
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUMMARY:

Additive manufacturing, particularly Fused Deposition Modeling (FDM) 3D printing, stands out as a versatile and accessible technology for producing polymeric components with complex geometries and a high degree of customization, driving advances in various sectors including engineering, prototyping, and the biomedical industry. Among the parameters influencing the mechanical performance of printed parts, the infill patterns play a crucial role, as they define the internal architecture of the material and determine how stresses are distributed throughout the structure. Although common 3D printing software offers a variety of predefined infill patterns, systematic studies comparing these patterns in terms of mechanical performance remain limited. In this context, the present work aims to investigate the influence of different infill patterns on the tensile strength of polylactic acid (PLA) specimens produced by 3D printing, considering the effects of internal geometry, orientation, and structural symmetry. Structural cells were designed and developed according to specific design requirements, and the samples were subjected to tensile testing in accordance with ASTM D638 standards. In addition, the thermal and mechanical behavior of the thermoplastic will be evaluated through Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), and Dynamic Mechanical Analysis (DMA). Based on the experimental results, variations in mechanical behavior will be analyzed as a function of the different configurations. The findings should demonstrate the significant influence of internal structure on the mechanical strength of 3D-printed parts, contributing to the optimization of manufacturing parameters and to the improvement of the structural performance of polymers processed by FDM. This study enhances the understanding of the role of infill patterns in the mechanical behavior of PLA and provides insights for the development of more efficient and customizable structures for engineering applications.

COMMITTEE MEMBERS:
Interna - 2042234 - ANA PAULA CYSNE BARBOSA
Interno - 2266607 - FABIO JOSE PINHEIRO SOUSA
Interna - 1755267 - MARIA CAROLINA BURGOS COSTA DO NASCIMENTO
Externo ao Programa - 1938946 - NICOLAU APOENA CASTRO - UFRN