--- _id: '682' abstract: - lang: eng text: Polylactic acid (PLA) belongs to the few thermoplastic polymers that are derived from renewable resources such as corn starch or sugar cane. PLA is often used in 3D printing by fused deposition modelling (FDM) since it is relatively easy to print, does not show warping and can be printed without a closed building chamber. On the other hand, PLA has interesting mechanical properties which are influenced by the printing parameters and geometries. Here we present shape-memory properties of PLA cubes with different infill patterns and percentages. We investigate the material response under defined quasi-static load as well as the possibility to restore the original 3D printed shape. The quasi-static flexural properties are linked to the porosity and the infill structure of the samples under investigation, examined optically and by simulations. Our results underline the importance of designing the infill patterns carefully to develop samples with desired mechanical properties. author: - first_name: Guido full_name: Ehrmann, Guido last_name: Ehrmann - first_name: Andrea full_name: Ehrmann, Andrea id: '223776' last_name: Ehrmann orcid: 0000-0003-0695-3905 orcid_put_code_url: https://api.orcid.org/v2.0/0000-0003-0695-3905/work/105572577 citation: alphadin: 'Ehrmann, Guido ; Ehrmann, Andrea: Shape-memory properties of 3D printed PLA structures. In: The First International Conference on “Green” Polymer Materials : MDPI, 2020' ama: 'Ehrmann G, Ehrmann A. Shape-memory properties of 3D printed PLA structures. In: The First International Conference on “Green” Polymer Materials. MDPI; 2020.' apa: Ehrmann, G., & Ehrmann, A. (2020). Shape-memory properties of 3D printed PLA structures. In The First International Conference on “Green” Polymer Materials. MDPI. bibtex: '@inproceedings{Ehrmann_Ehrmann_2020, title={ Shape-memory properties of 3D printed PLA structures}, booktitle={The First International Conference on “Green” Polymer Materials}, publisher={MDPI}, author={Ehrmann, Guido and Ehrmann, Andrea}, year={2020} }' chicago: Ehrmann, Guido, and Andrea Ehrmann. “ Shape-Memory Properties of 3D Printed PLA Structures.” In The First International Conference on “Green” Polymer Materials. MDPI, 2020. ieee: G. Ehrmann and A. Ehrmann, “ Shape-memory properties of 3D printed PLA structures,” in The First International Conference on “Green” Polymer Materials, 2020. mla: Ehrmann, Guido, and Andrea Ehrmann. “ Shape-Memory Properties of 3D Printed PLA Structures.” The First International Conference on “Green” Polymer Materials, MDPI, 2020. short: 'G. Ehrmann, A. Ehrmann, in: The First International Conference on “Green” Polymer Materials, MDPI, 2020.' conference: end_date: 25 November 2020 name: The First International Conference on “Green” Polymer Materials start_date: 5 November 2020 date_created: 2021-01-03T17:54:51Z date_updated: 2022-01-01T15:23:44Z department: - _id: '103' file: - access_level: open_access content_type: application/pdf creator: aehrmann date_created: 2021-01-03T17:53:23Z date_updated: 2021-01-03T17:53:23Z file_id: '683' file_name: 2020_EhrmannG_Sciforum.pdf file_size: 1037888 relation: main_file success: 1 file_date_updated: 2021-01-03T17:53:23Z has_accepted_license: '1' keyword: - polylactic acid - fused deposition modelling - 3 point bending test - infill parameters - infill density - shape-memory properties language: - iso: eng main_file_link: - open_access: '1' oa: '1' publication: The First International Conference on “Green” Polymer Materials publication_status: published publisher: MDPI quality_controlled: '1' status: public title: ' Shape-memory properties of 3D printed PLA structures' type: conference user_id: '223776' year: '2020' ... --- _id: '1626' abstract: - lang: eng text: ' Polylactic acid (PLA) belongs to the few thermoplastic polymers that are derived from renewable resources such as corn starch or sugar cane. PLA is often used in 3D printing by fused deposition modeling (FDM) since it is relatively easy to print, does not show warping, and can be printed without a closed building chamber. On the other hand, PLA has interesting mechanical properties which are influenced by the printing parameters and geometries. Here we present shape-memory properties of PLA cubes with different infill patterns and percentages. We investigate the material response under defined quasi-static load as well as the possibility to restore the original 3D printed shape. The quasi-static flexural properties are linked to the porosity and the infill structure of the samples under investigation, examined optically and by simulations. Our results underline the importance of designing the infill patterns carefully to develop samples with desired mechanical properties. ' author: - first_name: Guido full_name: Ehrmann, Guido last_name: Ehrmann - first_name: Andrea full_name: Ehrmann, Andrea id: '223776' last_name: Ehrmann orcid: 0000-0003-0695-3905 orcid_put_code_url: https://api.orcid.org/v2.0/0000-0003-0695-3905/work/105571396 citation: alphadin: 'Ehrmann, Guido ; Ehrmann, Andrea: Shape-Memory Properties of 3D Printed PLA Structures. In: Proceedings of The First International Conference on “Green” Polymer Materials 2020. Basel, Switzerland : MDPI, 2020, S. 7198' ama: 'Ehrmann G, Ehrmann A. Shape-Memory Properties of 3D Printed PLA Structures. In: Proceedings of The First International Conference on “Green” Polymer Materials 2020. Basel, Switzerland: MDPI; 2020:7198. doi:10.3390/CGPM2020-07198' apa: 'Ehrmann, G., & Ehrmann, A. (2020). Shape-Memory Properties of 3D Printed PLA Structures. In Proceedings of The First International Conference on “Green” Polymer Materials 2020 (p. 7198). Basel, Switzerland: MDPI. https://doi.org/10.3390/CGPM2020-07198' bibtex: '@inproceedings{Ehrmann_Ehrmann_2020, place={Basel, Switzerland}, title={Shape-Memory Properties of 3D Printed PLA Structures}, DOI={10.3390/CGPM2020-07198}, booktitle={Proceedings of The First International Conference on “Green” Polymer Materials 2020}, publisher={MDPI}, author={Ehrmann, Guido and Ehrmann, Andrea}, year={2020}, pages={7198} }' chicago: 'Ehrmann, Guido, and Andrea Ehrmann. “Shape-Memory Properties of 3D Printed PLA Structures.” In Proceedings of The First International Conference on “Green” Polymer Materials 2020, 7198. Basel, Switzerland: MDPI, 2020. https://doi.org/10.3390/CGPM2020-07198.' ieee: G. Ehrmann and A. Ehrmann, “Shape-Memory Properties of 3D Printed PLA Structures,” in Proceedings of The First International Conference on “Green” Polymer Materials 2020, Sciforum.net, 2020, p. 7198. mla: Ehrmann, Guido, and Andrea Ehrmann. “Shape-Memory Properties of 3D Printed PLA Structures.” Proceedings of The First International Conference on “Green” Polymer Materials 2020, MDPI, 2020, p. 7198, doi:10.3390/CGPM2020-07198. short: 'G. Ehrmann, A. Ehrmann, in: Proceedings of The First International Conference on “Green” Polymer Materials 2020, MDPI, Basel, Switzerland, 2020, p. 7198.' conference: location: Sciforum.net name: The First International Conference on “Green” Polymer Materials 2020 date_created: 2022-01-01T14:39:25Z date_updated: 2022-01-01T14:54:53Z department: - _id: '103' doi: 10.3390/CGPM2020-07198 keyword: - polylactic acid - fused deposition modelling - 3-point bending test - infill parameters - infill density - shape-memory properties language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.3390/CGPM2020-07198 oa: '1' page: '7198' place: Basel, Switzerland publication: Proceedings of The First International Conference on “Green” Polymer Materials 2020 publication_status: published publisher: MDPI quality_controlled: '1' status: public title: Shape-Memory Properties of 3D Printed PLA Structures tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: conference user_id: '223776' year: '2020' ... --- _id: '625' abstract: - lang: eng text: Additive manufacturing technologies are nowadays used in various industries. In most cases, however, the surface texture of the produced models is unsatisfactory and requires further processing, aiming to reduce surface roughness and waviness. The quality of the surface layer in many cases plays not only an aesthetic role but also affects, for example, the process of wear and tribological properties. In the presented work, samples prepared by fused deposition modelling technology from polylactic acid (PLA) material were subjected to tests. The samples were subjected to heat or chemical treatment through the use of acetone. The quality of the surface texture was tested both before and after the treatments. In addition, tests were carried out to determine the effect of the presented finishing treatment on the tensile strength of the tested sample models. The test results showed that both thermal treatment and acetone treatment influence the surface texture quality, especially the waviness, and that the acetone treatment can improve some mechanical properties. article_type: original author: - first_name: Tomasz full_name: Kozior, Tomasz last_name: Kozior - first_name: Al full_name: Mamun, Al last_name: Mamun - first_name: Marah full_name: Trabelsi, Marah last_name: Trabelsi - first_name: Lilia full_name: Sabantina, Lilia last_name: Sabantina - first_name: Andrea full_name: Ehrmann, Andrea last_name: Ehrmann date_created: 2021-01-03T13:31:12Z date_updated: 2021-01-18T15:32:28Z department: - _id: '103' doi: 10.5545/sv-jme.2019.6322 intvolume: ' 66' issue: '2' keyword: - 3D printing - finishing treatment - fused deposition modelling - surface texture - mechanical properties language: - iso: eng page: 105-113 publication: Strojniški vestnik – Journal of Mechanical Engineering publication_identifier: issn: - 0039-2480 publication_status: published quality_controlled: '1' status: public title: Quality of the Surface Texture and Mechanical Properties of FDM Printed Samples after Thermal and Chemical Treatment type: journal_article user_id: '223776' volume: 66 year: '2020' ...