DEVELOPMENT OF A CONFORMAL ADDITIVE MANUFACTURING PROCESS AND ITS APPLICATION

Bibliographic Details
Main Author:	Alkadi, Faez
Language:	English
Published:	University of Akron / OhioLINK 2019
Subjects:	Engineering Mechanical Engineering
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=akron1556282142803521

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-akron15562821428035212021-08-03T07:10:49Z DEVELOPMENT OF A CONFORMAL ADDITIVE MANUFACTURING PROCESS AND ITS APPLICATION Alkadi, Faez Engineering Mechanical Engineering Additive manufacturing (AM) technology has made a tremendous contribution in the manufacturing field by building real 3D parts including complex and delicate internal features in a single build. In this work, the processes of direct-print (DP) and filament fused fabrication (FFF) were taken to the development of the next level of AM by introducing the capability of conformal printing on freeform surfaces. To perform conformal printing, a series of algorithms has been developed to generate toolpaths for a printing head to build 3D structures on freeform surfaces. In the developed algorithms, a 3D model and freeform substrate along with printing parameters such as a nozzle size, gap height, infill density, etc. were used to generate desired toolpaths. Leading/Lagging of a filament is a common phenomenon resulting from the dynamic change of the printing angle (between the printing nozzle and the freeform substrate). This phenomenon has shown a big impact on the dimensions of the printed filament; therefore, an experimental investigation was carried out to resolve it. Multiple lines were printed and measured at different inclination angles (θ and φ) between (x-z axes) and (y-z axes), respectively, in order to maintain a constant line width and build high quality 3D parts. Moreover, to validate the proposed algorithms, 3D parts with different shapes were built on freeform substrates with different topologies. As an application, 3D conformal printing of a tire tread was accomplished to demonstrate the capability of the proposed algorithms to be used in repairing tire treads. In this application, a special ground tire rubber (GTR) composite material was developed to be used as printing ink. Printability, polymerization and mechanical tests were carried out for the GTR composite and its printed parts. In this dissertation, novel slicing algorithms and composite material were developed to 3D print tire tread on freeform surface. Common phenomenon resulting from conformal printing (such as leading/lagging) were investigated and resolved toward accurate printing. The developed slicing algorithms itself are expected to be a great asset for the future applications such as 3D printing of electrical circuits on freeform surfaces and repairing broken 3D structures. 2019-07-01 English text University of Akron / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=akron1556282142803521 http://rave.ohiolink.edu/etdc/view?acc_num=akron1556282142803521 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection	NDLTD
language	English
sources	NDLTD
topic	Engineering Mechanical Engineering
spellingShingle	Engineering Mechanical Engineering Alkadi, Faez DEVELOPMENT OF A CONFORMAL ADDITIVE MANUFACTURING PROCESS AND ITS APPLICATION
author	Alkadi, Faez
author_facet	Alkadi, Faez
author_sort	Alkadi, Faez
title	DEVELOPMENT OF A CONFORMAL ADDITIVE MANUFACTURING PROCESS AND ITS APPLICATION
title_short	DEVELOPMENT OF A CONFORMAL ADDITIVE MANUFACTURING PROCESS AND ITS APPLICATION
title_full	DEVELOPMENT OF A CONFORMAL ADDITIVE MANUFACTURING PROCESS AND ITS APPLICATION
title_fullStr	DEVELOPMENT OF A CONFORMAL ADDITIVE MANUFACTURING PROCESS AND ITS APPLICATION
title_full_unstemmed	DEVELOPMENT OF A CONFORMAL ADDITIVE MANUFACTURING PROCESS AND ITS APPLICATION
title_sort	development of a conformal additive manufacturing process and its application
publisher	University of Akron / OhioLINK
publishDate	2019
url	http://rave.ohiolink.edu/etdc/view?acc_num=akron1556282142803521
work_keys_str_mv	AT alkadifaez developmentofaconformaladditivemanufacturingprocessanditsapplication
_version_	1719455405828997120

DEVELOPMENT OF A CONFORMAL ADDITIVE MANUFACTURING PROCESS AND ITS APPLICATION

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