Monotonic and cyclic compressive performance of self-monitoring MWCNT/PA12 cellular composites manufactured by selective laser sintering
Herein, we experimentally investigate the mechanical and piezoresistive properties of selectively laser-sintered cellular composites under monotonic and cyclic compressive loading. Hexagonal honeycomb structures (HHSs) with relative densities of 20 %, 30 %, and 40 % were 3D printed from a ball-mille...
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Elsevier
2025-03-01
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| Series: | Composites Part C: Open Access |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666682025000106 |
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| author | Muhammad Umar Azam S Kumar Andreas Schiffer |
| author_facet | Muhammad Umar Azam S Kumar Andreas Schiffer |
| author_sort | Muhammad Umar Azam |
| collection | DOAJ |
| description | Herein, we experimentally investigate the mechanical and piezoresistive properties of selectively laser-sintered cellular composites under monotonic and cyclic compressive loading. Hexagonal honeycomb structures (HHSs) with relative densities of 20 %, 30 %, and 40 % were 3D printed from a ball-milled nanocomposite powder of multi-walled carbon nanotubes (MWCNTs) and polyamide 12 (PA12) with 0.3 wt.% MWCNTs. The pure PA12 HHSs exhibited lower porosity and superior mechanical properties, including collapse strength, elastic modulus and energy absorption, particularly at higher relative densities (30 % and 40 %). Notably, the specific energy absorption for the PA12 HHSs reached 24 J g⁻¹, under out-of-plane compression at 40 % relative density. Compared to neat PA12, the MWCNT/PA12 HHSs showed a reduction in strength and modulus but demonstrated excellent energy absorption efficiency of up to 53 %. Moreover, MWCNT/PA12 HHSs exhibited exceptional strain-sensing capabilities in the elastic region with gauge factors of up to 25. Cyclic tests showed that the zero-load resistance increased significantly as damage progressed during the collapse phase, highlighting their potential for application in smart, lightweight structures with integrated strain and damage-sensing functionalities. |
| format | Article |
| id | doaj-art-7d909bac02a54b038e33e4f3a07b73ee |
| institution | Kabale University |
| issn | 2666-6820 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Composites Part C: Open Access |
| spelling | doaj-art-7d909bac02a54b038e33e4f3a07b73ee2025-02-02T05:29:24ZengElsevierComposites Part C: Open Access2666-68202025-03-0116100566Monotonic and cyclic compressive performance of self-monitoring MWCNT/PA12 cellular composites manufactured by selective laser sinteringMuhammad Umar Azam0S Kumar1Andreas Schiffer2Department of Mechanical and Nuclear Engineering, Khalifa University of Science and Technology, Abu Dhabi, 127788, United Arab EmiratesJames Watt School of Engineering, University of Glasgow, Glasgow, G12 8QQ, UK; Corresponding authors.Department of Mechanical and Nuclear Engineering, Khalifa University of Science and Technology, Abu Dhabi, 127788, United Arab Emirates; Advanced Research and Innovation Center (ARIC), Khalifa University of Science and Technology, 127788, Abu Dhabi, United Arab Emirates; Corresponding authors.Herein, we experimentally investigate the mechanical and piezoresistive properties of selectively laser-sintered cellular composites under monotonic and cyclic compressive loading. Hexagonal honeycomb structures (HHSs) with relative densities of 20 %, 30 %, and 40 % were 3D printed from a ball-milled nanocomposite powder of multi-walled carbon nanotubes (MWCNTs) and polyamide 12 (PA12) with 0.3 wt.% MWCNTs. The pure PA12 HHSs exhibited lower porosity and superior mechanical properties, including collapse strength, elastic modulus and energy absorption, particularly at higher relative densities (30 % and 40 %). Notably, the specific energy absorption for the PA12 HHSs reached 24 J g⁻¹, under out-of-plane compression at 40 % relative density. Compared to neat PA12, the MWCNT/PA12 HHSs showed a reduction in strength and modulus but demonstrated excellent energy absorption efficiency of up to 53 %. Moreover, MWCNT/PA12 HHSs exhibited exceptional strain-sensing capabilities in the elastic region with gauge factors of up to 25. Cyclic tests showed that the zero-load resistance increased significantly as damage progressed during the collapse phase, highlighting their potential for application in smart, lightweight structures with integrated strain and damage-sensing functionalities.http://www.sciencedirect.com/science/article/pii/S26666820250001063D printingStrain sensingDamage sensingMultifunctional composites |
| spellingShingle | Muhammad Umar Azam S Kumar Andreas Schiffer Monotonic and cyclic compressive performance of self-monitoring MWCNT/PA12 cellular composites manufactured by selective laser sintering Composites Part C: Open Access 3D printing Strain sensing Damage sensing Multifunctional composites |
| title | Monotonic and cyclic compressive performance of self-monitoring MWCNT/PA12 cellular composites manufactured by selective laser sintering |
| title_full | Monotonic and cyclic compressive performance of self-monitoring MWCNT/PA12 cellular composites manufactured by selective laser sintering |
| title_fullStr | Monotonic and cyclic compressive performance of self-monitoring MWCNT/PA12 cellular composites manufactured by selective laser sintering |
| title_full_unstemmed | Monotonic and cyclic compressive performance of self-monitoring MWCNT/PA12 cellular composites manufactured by selective laser sintering |
| title_short | Monotonic and cyclic compressive performance of self-monitoring MWCNT/PA12 cellular composites manufactured by selective laser sintering |
| title_sort | monotonic and cyclic compressive performance of self monitoring mwcnt pa12 cellular composites manufactured by selective laser sintering |
| topic | 3D printing Strain sensing Damage sensing Multifunctional composites |
| url | http://www.sciencedirect.com/science/article/pii/S2666682025000106 |
| work_keys_str_mv | AT muhammadumarazam monotonicandcycliccompressiveperformanceofselfmonitoringmwcntpa12cellularcompositesmanufacturedbyselectivelasersintering AT skumar monotonicandcycliccompressiveperformanceofselfmonitoringmwcntpa12cellularcompositesmanufacturedbyselectivelasersintering AT andreasschiffer monotonicandcycliccompressiveperformanceofselfmonitoringmwcntpa12cellularcompositesmanufacturedbyselectivelasersintering |