--- _id: '1633' 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) as 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, extending the research reported before in a conference paper. 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 as well as to the numbers of closed top layers, examined optically and by simulations. Our results underline the importance of designing the infill patterns carefully to develop samples with desired mechanical properties.\r\n " article_number: '164' article_type: original 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/105571165 citation: alphadin: 'Ehrmann, Guido ; Ehrmann, Andrea: Investigation of the Shape-Memory Properties of 3D Printed PLA Structures with Different Infills. In: Polymers Bd. 13, MDPI AG (2021), Nr. 1' ama: Ehrmann G, Ehrmann A. Investigation of the Shape-Memory Properties of 3D Printed PLA Structures with Different Infills. Polymers. 2021;13(1). doi:10.3390/polym13010164 apa: Ehrmann, G., & Ehrmann, A. (2021). Investigation of the Shape-Memory Properties of 3D Printed PLA Structures with Different Infills. Polymers, 13(1). https://doi.org/10.3390/polym13010164 bibtex: '@article{Ehrmann_Ehrmann_2021, title={Investigation of the Shape-Memory Properties of 3D Printed PLA Structures with Different Infills}, volume={13}, DOI={10.3390/polym13010164}, number={1164}, journal={Polymers}, publisher={MDPI AG}, author={Ehrmann, Guido and Ehrmann, Andrea}, year={2021} }' chicago: Ehrmann, Guido, and Andrea Ehrmann. “Investigation of the Shape-Memory Properties of 3D Printed PLA Structures with Different Infills.” Polymers 13, no. 1 (2021). https://doi.org/10.3390/polym13010164. ieee: G. Ehrmann and A. Ehrmann, “Investigation of the Shape-Memory Properties of 3D Printed PLA Structures with Different Infills,” Polymers, vol. 13, no. 1, 2021. mla: Ehrmann, Guido, and Andrea Ehrmann. “Investigation of the Shape-Memory Properties of 3D Printed PLA Structures with Different Infills.” Polymers, vol. 13, no. 1, 164, MDPI AG, 2021, doi:10.3390/polym13010164. short: G. Ehrmann, A. Ehrmann, Polymers 13 (2021). date_created: 2022-01-01T14:47:53Z date_updated: 2022-01-01T15:10:09Z department: - _id: '103' doi: 10.3390/polym13010164 intvolume: ' 13' issue: '1' keyword: - polylactic acid (PLA) - fused deposition modeling - 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/polym13010164 oa: '1' publication: Polymers publication_identifier: eissn: - 2073-4360 publication_status: published publisher: MDPI AG quality_controlled: '1' status: public title: Investigation of the Shape-Memory Properties of 3D Printed PLA Structures with Different Infills 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: journal_article user_id: '223776' volume: 13 year: '2021' ... --- _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' ...