Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Finite element analyses modeling for additive manufacturing tracking thermal and mechanical properties in lattice structures
Submission Author:
Euclides Delgado Marques Santanna , DF
Co-Authors:
Euclides Delgado Marques Santanna, Carla Anflor
Presenter: Euclides Delgado Marques Santanna
doi://10.26678/ABCM.COBEM2023.COB2023-1156
Abstract
The additive manufacturing (AM) process is significantly different from conventional manufacturing processes, such as casting, machining, and forming, as material shaping is done locally through techniques like fusion, sintering, or curing, rather than across the entire extent of the desired part. Production of elements occurs in computer-controlled automated environments, enabling the creation of three-dimensional objects from computer-aided design (CAD) models using various materials, including metals, polymers, composites, and biologicals. AM offers high levels of customization and individualization with low impact on manufacturing complexity and cost, which is advantageous in the production of small quantities. In recent decades, AM has become established in industries, particularly metal matrix AM, which has been widely used in various areas of aerospace, automotive, and biomedical engineering, where lightweight and durable components are needed. To optimize component performance and shape, filling geometries use so-called lattice structures, which, due to their unique geometrical characteristics, offer increased stability and mechanical strength. Some of these geometries have negative Poisson's ratios, such as in auxetic structures, or are optimized in terms of mass/volume ratio, such as the Gyroid structure. In this context, the present work aims to analyze and characterize the metallic additive manufacturing of the Selective Laser Melting (SLM) type and its impact on complex lattice structures. Using computer simulations using the ANSYS® software, finite element analysis studies were carried out that characterize the effects of the AM process through SLM technology by reproducing the gradient variation effects of temperature resulting from the interaction between laser and material. With the thermal history of the geometry obtained, the impact of the AM process was observed with the emergence of thermally affected areas. This phenomenon results in a reduction in the mechanical properties of the geometry when compared to an ideal model. After applying the thermal loadings, a compression simulation was performed on the two test specimens to compare the performance of the samples. A comparative analysis between the ideal model and the one manufactured by the SLM process is introduced. Through geometry analysis, it is possible to predict the behavior and mechanical properties of a component. This allows for compensation, adjustments, and design changes to ensure the manufactured product meets the desired characteristics.
Keywords
Additive manufacturing, Finite Element Analysis, Selective Laser Melting (SLM), Lattice Structure, transient thermal analysis
