Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Optimizing Isogrid Structures for Multiple Performance Criteria: An Experimental Study
Submission Author:
Guilherme Ferreira Gomes , MG , Brazil
Co-Authors:
Adrien Noël , Rafael Augusto Gomes, Guilherme Ferreira Gomes
Presenter: Guilherme Ferreira Gomes
doi://10.26678/ABCM.COBEM2023.COB2023-0189
Abstract
The use of lattice structures has seen an increase across various sectors due to their potential for reducing mass while maintaining rigidity. Initially developed for the aeronautical industry, Isogrid structures have successfully achieved significant mass reduction without compromising structural integrity. The advent of additive manufacturing technology has further facilitated the development and application of these complex structures in diverse fields, including the creation of human prostheses. This paper aims to investigate and evaluate the performance of Isogrid tubular structures in compression tests, specifically comparing the efficiency of multi-objective optimized Isogrid tube designs. The samples used in the study were manufactured with identical parameters of diameter and height. The weight of the structures served as a parameter to analyze efficiency. The average weight of the optimized structures was 25 grams, while the average weight of the non-optimized structures was 21 grams. To manufacture the samples, a 3D printer was employed, utilizing two different materials: PLA and PLA with carbon fiber. Three samples of each model were produced, with three samples composed of PLA and three samples composed of carbon filament. The compression tests were conducted using a universal testing machine, enabling the evaluation of force versus displacement, energy absorbed (EA) versus displacement, specific energy absorbed (SEA), and the main crushing force of the structures. The test results facilitated a comparison of the efficiency between the optimized and non-optimized structures using the two different materials. While the optimized structure was less than 20% heavier than the non-optimized structure, the force required to rupture the structure increased by over 100%.
Keywords
Isogrid, Tubular structure, Additive manufacturing, Experimental tests
