Parametric optimization of intra- and inter- layer strengths inparts produced by extrusion- based additive manufacturing ofpoly(lactic acid)

Spoerk, Martin and Arbeiter, Florian and Cajner, Hrvoje and Sapkota, Janak and Holzer, Clemens (2017) Parametric optimization of intra- and inter- layer strengths inparts produced by extrusion- based additive manufacturing ofpoly(lactic acid). = Parametric optimization of intra- and inter- layer strengths inparts produced by extrusion- based additive manufacturing ofpoly(lactic acid). Journal of applied polymer science, 134 (41). pp. 45401-1. ISSN 0021-8995. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q2 (2016). Točan broj autora: 5.

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Abstract

Parts produced by extrusion-based additive manufacturing experience the disadvantage of consisting of many weld-lines, which consequently downgrade their mechanical properties. This work aims at maximizing the strength of printed parts by consider-ing and improving the intra- and inter-layer cohesion between adjacent strands. Therefore, printed poly(lactic acid) specimens werecharacterized by means of a particular tensile test setup, and the inter-layer cohesion of printed specimens was evaluated by means ofthe double cantilever beam test. A detailed parametric statistical evaluation, which included printing temperatures, layer thicknesses, and layer- designs, was complemented by the material’s viscosity data and the analysis of the specimens’ fracture surfaces and cross- sections. An optimal layer-design was found to be a key parameter in the optimization of strength with regard to different loadingdirections. Additionally, the maximization of the cohesion leads to a tremendous improvement in the mechanical performance of theprinted parts, resulting in strengths of roughly 90% of those of compression-molded parts.

Item Type:	Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian):	extrusion ; mechanical properties ; microscopy ; structure–property relationships ; thermoplastics
Subjects:	TECHNICAL SCIENCE > Mechanical Engineering
Divisions:	700 Department of Industrial Engineering > 720 Chair of Production Control
Indexed in Web of Science:	Yes
Indexed in Current Contents:	Yes
Quartiles:	Q2 (2016)
Date Deposited:	26 Mar 2018 15:03
Last Modified:	26 Mar 2018 15:03
URI:	http://repozitorij.fsb.hr/id/eprint/8558

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