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Low-Cycle Fatigue Behavior of 3D-Printed PLA Reinforced with Natural Filler

Additive production is currently perceived as an advanced technology, where intensive research is carried out in two basic directions—modifications of existing printing materials and the evaluation of mechanical properties depending on individual production parameters and the technology used. The cu...

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Autores principales: Müller, Miroslav, Šleger, Vladimír, Kolář, Viktor, Hromasová, Monika, Piš, Dominik, Mishra, Rajesh Kumar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9003259/
https://www.ncbi.nlm.nih.gov/pubmed/35406175
http://dx.doi.org/10.3390/polym14071301
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author Müller, Miroslav
Šleger, Vladimír
Kolář, Viktor
Hromasová, Monika
Piš, Dominik
Mishra, Rajesh Kumar
author_facet Müller, Miroslav
Šleger, Vladimír
Kolář, Viktor
Hromasová, Monika
Piš, Dominik
Mishra, Rajesh Kumar
author_sort Müller, Miroslav
collection PubMed
description Additive production is currently perceived as an advanced technology, where intensive research is carried out in two basic directions—modifications of existing printing materials and the evaluation of mechanical properties depending on individual production parameters and the technology used. The current research is focused on the evaluation of the fatigue behavior of 3D-printed test specimens made of pure PLA and PLA reinforced with filler based on pinewood, bamboo, and cork using FDM (fused deposition modeling) technology. This research was carried out in response to the growing demand for filaments from biodegradable materials. This article describes the results of tensile fatigue tests and image analysis of the fracture surface determined by the SEM method. Biodegradable PLA-based materials have their limitations that influence their applicability in practice. One of these limitations is fatigue life, which is the cyclic load interval exceeding 50% of the tensile strength determined in a static test. Comparison of the cyclic fatigue test results for pure PLA and PLA reinforced with natural reinforcement, e.g., pinewood, bamboo, and cork, showed that, under the same loading conditions, the fatigue life of the 3D-printed specimens was similar, i.e., the filler did not reduce the material’s ability to respond to low-cycle fatigue. Cyclic testing did not have a significant effect on the change in tensile strength and associated durability during this loading interval for PLA-based materials reinforced with biological filler. Under cyclic loading, the visco-elastic behavior of the tested materials was found to increase with increasing values of cyclic loading of 30%, 50% and 70%, and the permanent deformation of the tested materials, i.e., viscoelastic behavior (creep), also increased. SEM analysis showed the presence of porosity, interlayer disturbances, and at the same time good interfacial compatibility of PLA with the biological filler.
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spelling pubmed-90032592022-04-13 Low-Cycle Fatigue Behavior of 3D-Printed PLA Reinforced with Natural Filler Müller, Miroslav Šleger, Vladimír Kolář, Viktor Hromasová, Monika Piš, Dominik Mishra, Rajesh Kumar Polymers (Basel) Article Additive production is currently perceived as an advanced technology, where intensive research is carried out in two basic directions—modifications of existing printing materials and the evaluation of mechanical properties depending on individual production parameters and the technology used. The current research is focused on the evaluation of the fatigue behavior of 3D-printed test specimens made of pure PLA and PLA reinforced with filler based on pinewood, bamboo, and cork using FDM (fused deposition modeling) technology. This research was carried out in response to the growing demand for filaments from biodegradable materials. This article describes the results of tensile fatigue tests and image analysis of the fracture surface determined by the SEM method. Biodegradable PLA-based materials have their limitations that influence their applicability in practice. One of these limitations is fatigue life, which is the cyclic load interval exceeding 50% of the tensile strength determined in a static test. Comparison of the cyclic fatigue test results for pure PLA and PLA reinforced with natural reinforcement, e.g., pinewood, bamboo, and cork, showed that, under the same loading conditions, the fatigue life of the 3D-printed specimens was similar, i.e., the filler did not reduce the material’s ability to respond to low-cycle fatigue. Cyclic testing did not have a significant effect on the change in tensile strength and associated durability during this loading interval for PLA-based materials reinforced with biological filler. Under cyclic loading, the visco-elastic behavior of the tested materials was found to increase with increasing values of cyclic loading of 30%, 50% and 70%, and the permanent deformation of the tested materials, i.e., viscoelastic behavior (creep), also increased. SEM analysis showed the presence of porosity, interlayer disturbances, and at the same time good interfacial compatibility of PLA with the biological filler. MDPI 2022-03-23 /pmc/articles/PMC9003259/ /pubmed/35406175 http://dx.doi.org/10.3390/polym14071301 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Müller, Miroslav
Šleger, Vladimír
Kolář, Viktor
Hromasová, Monika
Piš, Dominik
Mishra, Rajesh Kumar
Low-Cycle Fatigue Behavior of 3D-Printed PLA Reinforced with Natural Filler
title Low-Cycle Fatigue Behavior of 3D-Printed PLA Reinforced with Natural Filler
title_full Low-Cycle Fatigue Behavior of 3D-Printed PLA Reinforced with Natural Filler
title_fullStr Low-Cycle Fatigue Behavior of 3D-Printed PLA Reinforced with Natural Filler
title_full_unstemmed Low-Cycle Fatigue Behavior of 3D-Printed PLA Reinforced with Natural Filler
title_short Low-Cycle Fatigue Behavior of 3D-Printed PLA Reinforced with Natural Filler
title_sort low-cycle fatigue behavior of 3d-printed pla reinforced with natural filler
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9003259/
https://www.ncbi.nlm.nih.gov/pubmed/35406175
http://dx.doi.org/10.3390/polym14071301
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