Parametric optimization of intra- and inter- layer strengths inparts produced by extrusion- based additive manufacturing ofpoly(lactic acid) (CROSBI ID 241759)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Spoerk, Martin ; Arbeiter, Florian ; Cajner, Hrvoje ; Sapkota, Janak ; Holzer, Clemens
engleski
Parametric optimization of intra- and inter- layer strengths inparts produced by extrusion- based additive manufacturing ofpoly(lactic acid)
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.
extrusion ; mechanical properties ; microscopy ; structure–property relationships ; thermoplastics
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Podaci o izdanju
134 (41)
2017.
45401-1-45401-
objavljeno
0021-8995
10.1002/app.45401