Irreversible and Repeatable Shape Transformation of Additively Manufactured Annular Composite Structures
Four-dimensional (4D) printing is a unique application of additive manufacturing (AM) which enables additional shape transformations over time. Although 4D printing is an interesting and attractive phenomenon, it still faces several challenges before it can be used for practical applications: (i) th...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-03-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/6/1383 |
| _version_ | 1797541517866303488 |
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| author | Bona Goo Jong-Bong Kim Dong-Gyu Ahn Keun Park |
| author_facet | Bona Goo Jong-Bong Kim Dong-Gyu Ahn Keun Park |
| author_sort | Bona Goo |
| collection | DOAJ |
| description | Four-dimensional (4D) printing is a unique application of additive manufacturing (AM) which enables additional shape transformations over time. Although 4D printing is an interesting and attractive phenomenon, it still faces several challenges before it can be used for practical applications: (i) the manufacturing cost should be competitive, and (ii) the shape transformations must have high dimensional accuracy and repeatability. In this study, an irreversible and repeatable thermoresponsive shape transformation method was developed using a material extrusion type AM process and a plain thermoplastic polymer (ABS) without a shape-memory function. Various types of annular discs were additively manufactured using printing paths programmed along a circular direction, and additional heat treatment was conducted as a thermal stimulus. The programmed circumferential anisotropy led to a unique 2D-to-3D shape transformation in response to the thermal stimulus. To obtain more predictable and repeatable shape transformation, the thermal stimulus was applied while using a geometric constraint. The relevant dimensional accuracy and repeatability of the constrained and unconstrained thermal deformations were compared. The proposed shape transformation method was further applied to AM and to the in situ assembly of a composite frame–membrane structure, where a functional membrane was integrated into a curved 3D frame without any additional assembly procedure. |
| first_indexed | 2024-03-10T13:17:13Z |
| format | Article |
| id | doaj.art-37b62cfd710b464b8b347f1ebfd55f1d |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T13:17:13Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-37b62cfd710b464b8b347f1ebfd55f1d2023-11-21T10:15:31ZengMDPI AGMaterials1996-19442021-03-01146138310.3390/ma14061383Irreversible and Repeatable Shape Transformation of Additively Manufactured Annular Composite StructuresBona Goo0Jong-Bong Kim1Dong-Gyu Ahn2Keun Park3Department of Mechanical System Design Engineering, Seoul National University of Science and Technology, Seoul 01811, KoreaDepartment of Mechanical and Automotive Engineering, Seoul National University of Science and Technology, Seoul 01811, KoreaDepartment of Mechanical Engineering, Chosun University, Gwang-ju 61452, KoreaDepartment of Mechanical System Design Engineering, Seoul National University of Science and Technology, Seoul 01811, KoreaFour-dimensional (4D) printing is a unique application of additive manufacturing (AM) which enables additional shape transformations over time. Although 4D printing is an interesting and attractive phenomenon, it still faces several challenges before it can be used for practical applications: (i) the manufacturing cost should be competitive, and (ii) the shape transformations must have high dimensional accuracy and repeatability. In this study, an irreversible and repeatable thermoresponsive shape transformation method was developed using a material extrusion type AM process and a plain thermoplastic polymer (ABS) without a shape-memory function. Various types of annular discs were additively manufactured using printing paths programmed along a circular direction, and additional heat treatment was conducted as a thermal stimulus. The programmed circumferential anisotropy led to a unique 2D-to-3D shape transformation in response to the thermal stimulus. To obtain more predictable and repeatable shape transformation, the thermal stimulus was applied while using a geometric constraint. The relevant dimensional accuracy and repeatability of the constrained and unconstrained thermal deformations were compared. The proposed shape transformation method was further applied to AM and to the in situ assembly of a composite frame–membrane structure, where a functional membrane was integrated into a curved 3D frame without any additional assembly procedure.https://www.mdpi.com/1996-1944/14/6/1383additive manufacturing4D printingmaterial extrusionirreversible shape transformationcircumferential anisotropy |
| spellingShingle | Bona Goo Jong-Bong Kim Dong-Gyu Ahn Keun Park Irreversible and Repeatable Shape Transformation of Additively Manufactured Annular Composite Structures Materials additive manufacturing 4D printing material extrusion irreversible shape transformation circumferential anisotropy |
| title | Irreversible and Repeatable Shape Transformation of Additively Manufactured Annular Composite Structures |
| title_full | Irreversible and Repeatable Shape Transformation of Additively Manufactured Annular Composite Structures |
| title_fullStr | Irreversible and Repeatable Shape Transformation of Additively Manufactured Annular Composite Structures |
| title_full_unstemmed | Irreversible and Repeatable Shape Transformation of Additively Manufactured Annular Composite Structures |
| title_short | Irreversible and Repeatable Shape Transformation of Additively Manufactured Annular Composite Structures |
| title_sort | irreversible and repeatable shape transformation of additively manufactured annular composite structures |
| topic | additive manufacturing 4D printing material extrusion irreversible shape transformation circumferential anisotropy |
| url | https://www.mdpi.com/1996-1944/14/6/1383 |
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