Investigation of Quasi-Static Indentation Response of Inkjet Printed Sandwich Structures under Various Indenter Geometries
The objective of this investigation was to determine the quasi-static indentation response and failure mode in three-dimensional (3D) printed trapezoidal core structures, and to characterize the energy absorbed by the structures. In this work, the trapezoidal sandwich structure was designed in the f...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2018
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| Online Access: | https://hdl.handle.net/10356/89358 http://hdl.handle.net/10220/44887 |
| _version_ | 1811680147721420800 |
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| author | Nagalingam, Arun Prasanth Yap, Yee Ling Sing, Swee Leong Yeong, Wai Yee Wei, Jun Dikshit, Vishwesh |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Nagalingam, Arun Prasanth Yap, Yee Ling Sing, Swee Leong Yeong, Wai Yee Wei, Jun Dikshit, Vishwesh |
| author_sort | Nagalingam, Arun Prasanth |
| collection | NTU |
| description | The objective of this investigation was to determine the quasi-static indentation response and failure mode in three-dimensional (3D) printed trapezoidal core structures, and to characterize the energy absorbed by the structures. In this work, the trapezoidal sandwich structure was designed in the following two ways. Firstly, the trapezoidal core along with its facesheet was 3D printed as a single element comprising a single material for both core and facesheet (type A); Secondly, the trapezoidal core along with facesheet was 3D printed, but with variation in facesheet materials (type B). Quasi-static indentation was carried out using three different indenters, namely standard hemispherical, conical, and flat indenters. Acoustic emission (AE) technique was used to capture brittle cracking in the specimens during indentation. The major failure modes were found to be brittle failure and quasi-brittle fractures. The measured indentation energy was at a maximum when using a conical indenter at 9.40 J and 9.66 J and was at a minimum when using a hemispherical indenter at 6.87 J and 8.82 J for type A and type B series specimens respectively. The observed maximum indenter displacements at failure were the effect of material variations and composite configurations in the facesheet. |
| first_indexed | 2024-10-01T03:20:26Z |
| format | Journal Article |
| id | ntu-10356/89358 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:20:26Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/893582023-03-04T17:18:58Z Investigation of Quasi-Static Indentation Response of Inkjet Printed Sandwich Structures under Various Indenter Geometries Nagalingam, Arun Prasanth Yap, Yee Ling Sing, Swee Leong Yeong, Wai Yee Wei, Jun Dikshit, Vishwesh School of Mechanical and Aerospace Engineering A*STAR SIMTech Singapore Centre for 3D Printing Additive Manufacturing Three-dimensional (3D) Printing The objective of this investigation was to determine the quasi-static indentation response and failure mode in three-dimensional (3D) printed trapezoidal core structures, and to characterize the energy absorbed by the structures. In this work, the trapezoidal sandwich structure was designed in the following two ways. Firstly, the trapezoidal core along with its facesheet was 3D printed as a single element comprising a single material for both core and facesheet (type A); Secondly, the trapezoidal core along with facesheet was 3D printed, but with variation in facesheet materials (type B). Quasi-static indentation was carried out using three different indenters, namely standard hemispherical, conical, and flat indenters. Acoustic emission (AE) technique was used to capture brittle cracking in the specimens during indentation. The major failure modes were found to be brittle failure and quasi-brittle fractures. The measured indentation energy was at a maximum when using a conical indenter at 9.40 J and 9.66 J and was at a minimum when using a hemispherical indenter at 6.87 J and 8.82 J for type A and type B series specimens respectively. The observed maximum indenter displacements at failure were the effect of material variations and composite configurations in the facesheet. ASTAR (Agency for Sci., Tech. and Research, S’pore) Published version 2018-05-24T03:36:14Z 2019-12-06T17:23:45Z 2018-05-24T03:36:14Z 2019-12-06T17:23:45Z 2017 Journal Article Dikshit, V., Nagalingam, A. P., Yap, Y. L., Sing, S. L., Yeong, W. Y., & Wei, J. (2017). Investigation of Quasi-Static Indentation Response of Inkjet Printed Sandwich Structures under Various Indenter Geometries. Materials, 10(3), 290-. 1996-1944 https://hdl.handle.net/10356/89358 http://hdl.handle.net/10220/44887 10.3390/ma10030290 en Materials © 2017 by The Author(s). 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 (http://creativecommons.org/licenses/by/4.0/). 18 p. application/pdf |
| spellingShingle | Additive Manufacturing Three-dimensional (3D) Printing Nagalingam, Arun Prasanth Yap, Yee Ling Sing, Swee Leong Yeong, Wai Yee Wei, Jun Dikshit, Vishwesh Investigation of Quasi-Static Indentation Response of Inkjet Printed Sandwich Structures under Various Indenter Geometries |
| title | Investigation of Quasi-Static Indentation Response of Inkjet Printed Sandwich Structures under Various Indenter Geometries |
| title_full | Investigation of Quasi-Static Indentation Response of Inkjet Printed Sandwich Structures under Various Indenter Geometries |
| title_fullStr | Investigation of Quasi-Static Indentation Response of Inkjet Printed Sandwich Structures under Various Indenter Geometries |
| title_full_unstemmed | Investigation of Quasi-Static Indentation Response of Inkjet Printed Sandwich Structures under Various Indenter Geometries |
| title_short | Investigation of Quasi-Static Indentation Response of Inkjet Printed Sandwich Structures under Various Indenter Geometries |
| title_sort | investigation of quasi static indentation response of inkjet printed sandwich structures under various indenter geometries |
| topic | Additive Manufacturing Three-dimensional (3D) Printing |
| url | https://hdl.handle.net/10356/89358 http://hdl.handle.net/10220/44887 |
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