Topološko optimiranje konstrukcije nosača police za aditivnu proizvodnju na temelju izbora materijala i shema opterećenja

master's thesis

• Title (english): Topology optimisation of the design of shelf carrier for addiive manufacturing based on the material selection and load scheme
• Author: Mario Brozović
• Mentor: Damir Godec (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2024-01-24, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Production Mechanical Engineering

Abstract

Topološko optimiranje u kontekstu razvoja proizvoda jedan je od moćnijih suvremenih inženjerskih alata za poboljšanje svojstava konstrukcija. Ubrzana primjena topološkog optimiranja počela je paralelno s razvojem postupaka aditivne proizvodnje 80-ih godina 20. stoljeća. Spajanjem procesa aditivne proizvodnje s neobičnim i organskim geometrijskim oblicima topološki optimiranih konstrukcija premoštena je barijera nemogućnosti izrade proizvoda visoke razine kompleksnosti korištenjem konvencionalnih postupaka proizvodnje. Ovaj rad služi kao primjer optimiranja konstrukcije nosača police velike nosivosti s primjenom četiri različita materijala i njihovom usporedbom. Pritom je predviđeno da će se nosač izrađivati korištenjem aditivnom proizvodnjom te su u tu svrhu primijenjena određena ograničenja na simulacijski model.
Teorijski dio rada obuhvaća uvod u osnove topološkog optimiranja kao konstrukcijske metode, uključujući njenu matematičku osnovu, te opis potrebnih koraka koji su sastavni dio procesa optimiranja. Dodatno je opisan postupak topološkog optimiranja u programskom paketu Altair Inspire te su dane određene smjernice prilikom detaljiranja simulacijskog modela. Nadalje, dan je općeniti uvod u aditivnu proizvodnju i aspekti koji se moraju uzeti u obzir kako bi njeno korištenje bilo isplativo u odnosu na komercijalne postupke proizvodnje. U sklopu istog poglavlja opširno su opisana načela oblikovanja polimernih i metalnih proizvoda za izradu korištenjem aditivnih postupaka proizvodnje.
U praktičnom dijelu rada prikazan je proces topološkog optimiranja nosača police velike nosivosti korištenjem programskog paketa Altair Inspire. Definirana je inicijalna konstrukcija nosača i univerzalno opterećenje korišteno u procesu. Predstavljena su svojstva četiri odabrana materijala za primjenu tijekom topološkog optimiranja i prikazani su dobiveni rezultati optimiranja. Nosač razvijen od svakog primijenjenog materijala podvrgnut je dvjema različitim iteracijama optimiranja, s ciljem minimiranja mase i maksimiranja krutosti. Na uzorku uspješno provedenih simulacija opterećenja s ukupnim trajanjem od približno 43 sata, dobiveni su zadovoljavajući rezultati i napravljena je njihova međusobna usporedba. Na kraju rada dani su određeni prijedlozi oko daljnjeg razvoja problematike.

Abstract (english)

Topology optimization in the product development context is one of the most powerful modern engineering tools for improving mechanical properties of structures. The widespread application of topology optimization started in parallel with aditive manufacturing development in the 1980s. By combining additive manufacuring processes with unusual and organic geometric shapes of topologically optimized constructions, the impossibility barrier in manufacturing high complexity products using conventional manufacturing procedures has been overcome. This paper serves as an example of optimizing the structure of a heavy-duty shelf bracket with the application of four different materials and their comparison. At the same time, it is foreseen that the bracket will be made using additive manufacturing, and for this purpose, certain restrictions have been applied to the simulation model.
The theoretical part of the paper includes an introduction to the basics of topology optimization as a design method, including its mathematical basis, and a description of the necessary steps that are an integral part of the optimization process. Additionally, the topology optimization procedure in the Altair Inspire software package is described with certain guidelines that must be followed. Furthermore, a general introduction to additive manufacturing and the aspects that must be taken into account in order to make its use profitable in relation to commercial manufacturing processes are given. The principles of designing polymer and metal products for the use of additive manufacturing processes are described in detail as well.
In the practical part of the work, the process of topology optimization of the heavy-duty bracket using the Altair Inspire program package is presented. The initial structure of the support and the universal load used in the process are defined. The properties of four selected materials for application during topological optimization are presented and the obtained optimization results are presented. The bracket made of each material used is subjected to two different optimization iterations, aiming to minimize mass and maximize stiffness. On a sample of successfully performed load simulations with a total duration of approximately 43 hours, satisfactory results were obtained and their mutual comparison was made. At the end of the paper, certain suggestions were given regarding the further development of the issue.

• Keywords: topološko optimiranje; nosač; aditivna proizvodnja; masa; polimeri; metali; krutost
• Keywords (english): topology optimization; bracket; additive manufacturing; mass; polymers; metals; stiffness
• Language: croatian
• URN:NBN: urn:nbn:hr:235:936660
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-01-18 22:43:50