Build Orientation-Driven Anisotropic Fracture Behaviour in Polymer Parts Fabricated by Powder Bed Fusion
Additive manufacturing (AM) enables fabricating intricate objects with complex geometries previously unattainable through conventional methods. This process encompasses various techniques, including powder bed fusion (PBF), such as selective laser sintering (SLS) and multi-jet fusion (MJF). These te...
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MDPI AG
2024-11-01
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| Series: | Journal of Manufacturing and Materials Processing |
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| Online Access: | https://www.mdpi.com/2504-4494/8/6/263 |
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| author | Karthik Ram Ramakrishnan Jagan Selvaraj |
| author_facet | Karthik Ram Ramakrishnan Jagan Selvaraj |
| author_sort | Karthik Ram Ramakrishnan |
| collection | DOAJ |
| description | Additive manufacturing (AM) enables fabricating intricate objects with complex geometries previously unattainable through conventional methods. This process encompasses various techniques, including powder bed fusion (PBF), such as selective laser sintering (SLS) and multi-jet fusion (MJF). These techniques involve selectively melting powdered polymer material, predominantly utilizing engineering thermoplastics layer by layer to create solid components. Although their mechanical properties have been extensively characterised, very few works have addressed the influence of additive manufacturing on fracture behaviour. In this context, we present our work demonstrating the presence of anisotropy in fracture behaviour due to the build orientation as well as the PBF methods. To evaluate this anisotropy, the fracture behaviour of polyamide 12 polymer manufactured by SLS and MJF were investigated with experiments and numerical modelling of Mode I compact tension (CT) specimens. Experiments were monitored by digital image correlation (DIC) and infra-red thermography (IRT). Additionally, the fractured surfaces are analysed using scanning electron microscopy. Comparative analyses between SLS and MJF technologies unveiled dissimilar trends in mechanical strength, build-orientation effects, and fracture properties. |
| format | Article |
| id | doaj-art-7e9caf73d89549b4bb439fbce8a0fbc5 |
| institution | OA Journals |
| issn | 2504-4494 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Manufacturing and Materials Processing |
| spelling | doaj-art-7e9caf73d89549b4bb439fbce8a0fbc52025-08-20T02:00:42ZengMDPI AGJournal of Manufacturing and Materials Processing2504-44942024-11-018626310.3390/jmmp8060263Build Orientation-Driven Anisotropic Fracture Behaviour in Polymer Parts Fabricated by Powder Bed FusionKarthik Ram Ramakrishnan0Jagan Selvaraj1Bristol Composites Institute, University of Bristol, Bristol BS8 1TR, UKBristol Composites Institute, University of Bristol, Bristol BS8 1TR, UKAdditive manufacturing (AM) enables fabricating intricate objects with complex geometries previously unattainable through conventional methods. This process encompasses various techniques, including powder bed fusion (PBF), such as selective laser sintering (SLS) and multi-jet fusion (MJF). These techniques involve selectively melting powdered polymer material, predominantly utilizing engineering thermoplastics layer by layer to create solid components. Although their mechanical properties have been extensively characterised, very few works have addressed the influence of additive manufacturing on fracture behaviour. In this context, we present our work demonstrating the presence of anisotropy in fracture behaviour due to the build orientation as well as the PBF methods. To evaluate this anisotropy, the fracture behaviour of polyamide 12 polymer manufactured by SLS and MJF were investigated with experiments and numerical modelling of Mode I compact tension (CT) specimens. Experiments were monitored by digital image correlation (DIC) and infra-red thermography (IRT). Additionally, the fractured surfaces are analysed using scanning electron microscopy. Comparative analyses between SLS and MJF technologies unveiled dissimilar trends in mechanical strength, build-orientation effects, and fracture properties.https://www.mdpi.com/2504-4494/8/6/263additive manufacturingfracture behaviourmechanical strengthdigital image correlationcohesive zone modellingpolyamide 12 |
| spellingShingle | Karthik Ram Ramakrishnan Jagan Selvaraj Build Orientation-Driven Anisotropic Fracture Behaviour in Polymer Parts Fabricated by Powder Bed Fusion Journal of Manufacturing and Materials Processing additive manufacturing fracture behaviour mechanical strength digital image correlation cohesive zone modelling polyamide 12 |
| title | Build Orientation-Driven Anisotropic Fracture Behaviour in Polymer Parts Fabricated by Powder Bed Fusion |
| title_full | Build Orientation-Driven Anisotropic Fracture Behaviour in Polymer Parts Fabricated by Powder Bed Fusion |
| title_fullStr | Build Orientation-Driven Anisotropic Fracture Behaviour in Polymer Parts Fabricated by Powder Bed Fusion |
| title_full_unstemmed | Build Orientation-Driven Anisotropic Fracture Behaviour in Polymer Parts Fabricated by Powder Bed Fusion |
| title_short | Build Orientation-Driven Anisotropic Fracture Behaviour in Polymer Parts Fabricated by Powder Bed Fusion |
| title_sort | build orientation driven anisotropic fracture behaviour in polymer parts fabricated by powder bed fusion |
| topic | additive manufacturing fracture behaviour mechanical strength digital image correlation cohesive zone modelling polyamide 12 |
| url | https://www.mdpi.com/2504-4494/8/6/263 |
| work_keys_str_mv | AT karthikramramakrishnan buildorientationdrivenanisotropicfracturebehaviourinpolymerpartsfabricatedbypowderbedfusion AT jaganselvaraj buildorientationdrivenanisotropicfracturebehaviourinpolymerpartsfabricatedbypowderbedfusion |