Desempenho em ensaio de impacto de estruturas Honeycomb em ABS produzidas por manufatura aditiva

Abstract

With the growth in the use of additive manufacturing in the industry, new possibilities appear for applications that require impact absorption. One of these is the use of cellular structures, which have a good combination of high mechanical strength and mass reduction. In this context, the honeycomb sandwich stands out as a cellular structure that has a good performance in impact absorption. In order to analyze this performance, samples with honeycomb sandwich structure with different cell sizes were manufactured using a 3D printer. Massive specimens were also made. Then, impact tests were carried out and the results of the energy absorbed in each specimen were collected. A description of the fractures that occurred and an analysis of the results obtained is carried out. The elaborate structures do not show significant difference in their performance. Massive specimens absorb on average 138% more impact energy and are only 84% heavier. A correlation was found between the mass of the specimens and the energy absorbed by them. It was concluded that the solid specimen presents a better performance than honeycomb structures when subjected to impact testing.