Influence of Infill Geometry and Density on the Mechanical Properties of 3D-Printed Polylactic Acid Structure

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60162694%3AG43__%2F26%3A00564513" target="_blank" >RIV/60162694:G43__/26:00564513 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/2504-4494/9/4/134" target="_blank" >https://www.mdpi.com/2504-4494/9/4/134</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/jmmp9040134" target="_blank" >10.3390/jmmp9040134</a>

Result language

angličtina

Original language name

Influence of Infill Geometry and Density on the Mechanical Properties of 3D-Printed Polylactic Acid Structure

Original language description

Additive manufacturing of polymer composites, also known as 3D printing, is one of the progressive technologies in material engineering. It enables the production of parts with complex geometries while optimizing material efficiency. Polylactide (PLA) is a widely used material in additive manufacturing due to its biodegradability and suitable mechanical properties. However, its brittleness and limited thermal stability require further modifications, such as modifying the filler structure or adding reinforcing materials. This paper focuses on analyzing the influence of different filler geometries and densities on the mechanical properties of PLA parts manufactured by the fused filament deposition (FFF) method. Three basic filler structures-cubic, gyroid and rectilinear-were investigated at different density levels from 20%, 40%, 60% and 80%. Experimental tests were performed according to ASTM D638 to determine the strength characteristics of the material. In addition to mechanical tests, dynamic mechanical analysis (DMA) and thermogravimetric analysis (TG) were performed to better understand the influence of the filling geometry on the thermal stability and viscoelastic behavior of the material. Experimental tests according to ASTM D638 showed that higher filling density improves mechanical properties. At 80% filling, the tensile strength reached 21.06 MPa (cubic), 20.53 MPa (gyroid) and 20.84 MPa (linear). The elastic modulus was highest with cubic filling (1414.19 MPa). The yield strength reached 15.59 MPa (cubic), 15.52 MPa (gyroid) and 14.30 MPa (linear).

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

21100 - Other engineering and technologies

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

JOURNAL OF MANUFACTURING AND MATERIALS PROCESSING

ISSN

2504-4494

e-ISSN

2504-4494

Volume of the periodical

9

Issue of the periodical within the volume

4

Country of publishing house

CH - SWITZERLAND

Number of pages

21

Pages from-to

134

UT code for WoS article

001475661300001

EID of the result in the Scopus database

2-s2.0-105003413877