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Effect of Relative Density in In-Plane Mechanical Properties of Common 3D-Printed Polylactic Acid Lattice Structures.
León-Becerra, Juan; González-Estrada, Octavio A; Quiroga, Jabid.
Afiliação
  • León-Becerra J; Research Group on Energy and Environment, School of Mechanical Engineering, Universidad Industrial de Santander, Bucaramanga 680002, Colombia.
  • González-Estrada OA; Research Group on Energy and Environment, School of Mechanical Engineering, Universidad Industrial de Santander, Bucaramanga 680002, Colombia.
  • Quiroga J; Research Group in Dynamics, Control and Robotics, School of Mechanical Engineering, Universidad Industrial de Santander, Bucaramanga 680002, Colombia.
ACS Omega ; 6(44): 29830-29838, 2021 Nov 09.
Article em En | MEDLINE | ID: mdl-34778656
Lattice structures are employed as lightweight sandwich cores, supports, or infill patterns of additive manufacturing (AM) components. As infill structures, the mechanical properties of AM parts are influenced by the infill pattern. In this work, we present the mechanical characterization of three commonly used infill patterns in AM, triangular, square, and hexagonal, and compare them with analytical and numerical models. Fused filament fabrication of polylactic acid (PLA) thermoplastic is used as the printing material for the compressive and tensile tests. First, a parametric analysis is performed by changing the infill density to obtain numerically and analytically the mechanical properties of the studied samples. Next, we compare the experimental results with numerical and analytical models and propose numerical correlations for high-density honeycombs. The stiffest infill pattern was the square, and the explanation is provided in detail. Also, there is a nonlinear correlation between density and the mechanical properties; however, the strongest part was not possible to determine with a significant statistical value. Finally, we propose simplified models for predicting the compressive and tensile response of AM PLA structures by considering the infill regions as homogenized structures.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: ACS Omega Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Colômbia País de publicação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: ACS Omega Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Colômbia País de publicação: Estados Unidos