Geometrical Scaling Effects in the Mechanical Properties of 3D-Printed Body-Centered Cubic (BCC) Lattice Structures
This paper investigates size effects on the mechanical response of additively manufactured lattice structures based on a commercially available polylactic acid (PLA) polymer. Initial attention is focused on investigating geometrical effects in the mechanical properties of simple beams and cubes. Fol...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-11-01
|
| Series: | Polymers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4360/13/22/3967 |
| _version_ | 1797508669939646464 |
|---|---|
| author | Alia Ruzanna Aziz Jin Zhou David Thorne Wesley James Cantwell |
| author_facet | Alia Ruzanna Aziz Jin Zhou David Thorne Wesley James Cantwell |
| author_sort | Alia Ruzanna Aziz |
| collection | DOAJ |
| description | This paper investigates size effects on the mechanical response of additively manufactured lattice structures based on a commercially available polylactic acid (PLA) polymer. Initial attention is focused on investigating geometrical effects in the mechanical properties of simple beams and cubes. Following this, a number of geometrically scaled lattice structures based on the body-centered cubic design were manufactured and tested in order to highlight size effects in their compression properties and failure modes. A finite element analysis was also conducted in order to compare the predicted modes of failure with those observed experimentally. Scaling effects were observed in the compression response of the PLA cubes, with the compression strength increasing by approximately 19% over the range of scale sizes investigated. Similar size-related effects were observed in the flexural samples, where a brittle mode of failure was observed at all scale sizes. Here, the flexural strength increased by approximately 18% when passing from the quarter size sample to its full-scale counterpart. Significant size effects were observed following the compression tests on the scaled lattice structures. Here, the compression strength increased by approximately 60% over the four sample sizes, in spite of the fact that similar failure modes were observed in all samples. Finally, reasonably good agreement was observed between the predicted failure modes and those observed experimentally. However, the FE models tended to over-estimate the mechanical properties of the lattice structures, probably as a result of the fact that the models were assumed to be defect free. |
| first_indexed | 2024-03-10T05:07:09Z |
| format | Article |
| id | doaj.art-99c6f11372b44321bab2ddc5a002c967 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T05:07:09Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-99c6f11372b44321bab2ddc5a002c9672023-11-23T01:09:38ZengMDPI AGPolymers2073-43602021-11-011322396710.3390/polym13223967Geometrical Scaling Effects in the Mechanical Properties of 3D-Printed Body-Centered Cubic (BCC) Lattice StructuresAlia Ruzanna Aziz0Jin Zhou1David Thorne2Wesley James Cantwell3Advanced Materials Research Centre, Technology Innovation Institute, Abu Dhabi 9639, United Arab EmiratesSchool of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaAerospace Research and Innovation Center (ARIC), Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab EmiratesAerospace Research and Innovation Center (ARIC), Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab EmiratesThis paper investigates size effects on the mechanical response of additively manufactured lattice structures based on a commercially available polylactic acid (PLA) polymer. Initial attention is focused on investigating geometrical effects in the mechanical properties of simple beams and cubes. Following this, a number of geometrically scaled lattice structures based on the body-centered cubic design were manufactured and tested in order to highlight size effects in their compression properties and failure modes. A finite element analysis was also conducted in order to compare the predicted modes of failure with those observed experimentally. Scaling effects were observed in the compression response of the PLA cubes, with the compression strength increasing by approximately 19% over the range of scale sizes investigated. Similar size-related effects were observed in the flexural samples, where a brittle mode of failure was observed at all scale sizes. Here, the flexural strength increased by approximately 18% when passing from the quarter size sample to its full-scale counterpart. Significant size effects were observed following the compression tests on the scaled lattice structures. Here, the compression strength increased by approximately 60% over the four sample sizes, in spite of the fact that similar failure modes were observed in all samples. Finally, reasonably good agreement was observed between the predicted failure modes and those observed experimentally. However, the FE models tended to over-estimate the mechanical properties of the lattice structures, probably as a result of the fact that the models were assumed to be defect free.https://www.mdpi.com/2073-4360/13/22/3967scaling effectsadditive manufacturingPLA polymerlattice structurescompression testsfailure modes |
| spellingShingle | Alia Ruzanna Aziz Jin Zhou David Thorne Wesley James Cantwell Geometrical Scaling Effects in the Mechanical Properties of 3D-Printed Body-Centered Cubic (BCC) Lattice Structures Polymers scaling effects additive manufacturing PLA polymer lattice structures compression tests failure modes |
| title | Geometrical Scaling Effects in the Mechanical Properties of 3D-Printed Body-Centered Cubic (BCC) Lattice Structures |
| title_full | Geometrical Scaling Effects in the Mechanical Properties of 3D-Printed Body-Centered Cubic (BCC) Lattice Structures |
| title_fullStr | Geometrical Scaling Effects in the Mechanical Properties of 3D-Printed Body-Centered Cubic (BCC) Lattice Structures |
| title_full_unstemmed | Geometrical Scaling Effects in the Mechanical Properties of 3D-Printed Body-Centered Cubic (BCC) Lattice Structures |
| title_short | Geometrical Scaling Effects in the Mechanical Properties of 3D-Printed Body-Centered Cubic (BCC) Lattice Structures |
| title_sort | geometrical scaling effects in the mechanical properties of 3d printed body centered cubic bcc lattice structures |
| topic | scaling effects additive manufacturing PLA polymer lattice structures compression tests failure modes |
| url | https://www.mdpi.com/2073-4360/13/22/3967 |
| work_keys_str_mv | AT aliaruzannaaziz geometricalscalingeffectsinthemechanicalpropertiesof3dprintedbodycenteredcubicbcclatticestructures AT jinzhou geometricalscalingeffectsinthemechanicalpropertiesof3dprintedbodycenteredcubicbcclatticestructures AT davidthorne geometricalscalingeffectsinthemechanicalpropertiesof3dprintedbodycenteredcubicbcclatticestructures AT wesleyjamescantwell geometricalscalingeffectsinthemechanicalpropertiesof3dprintedbodycenteredcubicbcclatticestructures |