Shell offset enhances mechanical and energy absorption properties of SLM-made lattices with controllable separated voids
Additive manufacturing has enabled surface-based sheet lattice to emerge as a new mechanical metamaterial with exceptional weight specific strength properties and multifunction. A novel design method of shell offset has been developed here for enhancement of mechanical properties and domain controll...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-05-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127522002519 |
| _version_ | 1818205697953759232 |
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| author | Fei Liu Tianyu Zhou Tao Zhang Haiqiong Xie Yichuan Tang Pan Zhang |
| author_facet | Fei Liu Tianyu Zhou Tao Zhang Haiqiong Xie Yichuan Tang Pan Zhang |
| author_sort | Fei Liu |
| collection | DOAJ |
| description | Additive manufacturing has enabled surface-based sheet lattice to emerge as a new mechanical metamaterial with exceptional weight specific strength properties and multifunction. A novel design method of shell offset has been developed here for enhancement of mechanical properties and domain controllability of separated spaces by sheet lattice. Using selective laser melting, Ti6Al4V lattice samples were fabricated for compression experiments, followed by Micro-CT reconstruction. Manufacturing deviations with mean values of statistical analysis were taken into numerical simulations for prediction of mechanical properties. Investigation results show that increasing the shell offset is an effective strategy to improve mechanical properties and energy absorption of sheet lattices by more than 200% competing with net lattices, which is attributed to the higher second moment of area and successive layer-by-layer deformation mechanism of optimized unit type. In addition, a feasible adjustment region of 30–55% has been found, in which spatial volume fraction of the two independent void phases can be controlled for flow regulation of heat exchange without changing their mechanical properties. Those design concepts of sheet lattices will be valuable in future thermal management applications with lightweight protection. |
| first_indexed | 2024-12-12T04:01:16Z |
| format | Article |
| id | doaj.art-5be6a811c9634037b0816c552983be47 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-12-12T04:01:16Z |
| publishDate | 2022-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-5be6a811c9634037b0816c552983be472022-12-22T00:39:02ZengElsevierMaterials & Design0264-12752022-05-01217110630Shell offset enhances mechanical and energy absorption properties of SLM-made lattices with controllable separated voidsFei Liu0Tianyu Zhou1Tao Zhang2Haiqiong Xie3Yichuan Tang4Pan Zhang5School of Advanced Manufacturing Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China; Sports Medicine Center, Department of Orthopedic Surgery, Southwest Hospital, The Third Military Medical University, Gaotanyan Str. 30, Shapingba District, Chongqing 400038, ChinaSchool of Advanced Manufacturing Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China; Corresponding author at: School of Advanced Manufacturing Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China.Chongqing Key Laboratory of Metal Additive Manufacturing (3D Printing), Chongqing University, Chongqing 400044, ChinaSchool of Advanced Manufacturing Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China; Sports Medicine Center, Department of Orthopedic Surgery, Southwest Hospital, The Third Military Medical University, Gaotanyan Str. 30, Shapingba District, Chongqing 400038, ChinaSchool of Advanced Manufacturing Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, ChinaSchool of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaAdditive manufacturing has enabled surface-based sheet lattice to emerge as a new mechanical metamaterial with exceptional weight specific strength properties and multifunction. A novel design method of shell offset has been developed here for enhancement of mechanical properties and domain controllability of separated spaces by sheet lattice. Using selective laser melting, Ti6Al4V lattice samples were fabricated for compression experiments, followed by Micro-CT reconstruction. Manufacturing deviations with mean values of statistical analysis were taken into numerical simulations for prediction of mechanical properties. Investigation results show that increasing the shell offset is an effective strategy to improve mechanical properties and energy absorption of sheet lattices by more than 200% competing with net lattices, which is attributed to the higher second moment of area and successive layer-by-layer deformation mechanism of optimized unit type. In addition, a feasible adjustment region of 30–55% has been found, in which spatial volume fraction of the two independent void phases can be controlled for flow regulation of heat exchange without changing their mechanical properties. Those design concepts of sheet lattices will be valuable in future thermal management applications with lightweight protection.http://www.sciencedirect.com/science/article/pii/S0264127522002519Selective laser meltingSheet latticeTriply periodic minimal surfaceCT reconstructionMechanical behaviourEnergy absorption |
| spellingShingle | Fei Liu Tianyu Zhou Tao Zhang Haiqiong Xie Yichuan Tang Pan Zhang Shell offset enhances mechanical and energy absorption properties of SLM-made lattices with controllable separated voids Materials & Design Selective laser melting Sheet lattice Triply periodic minimal surface CT reconstruction Mechanical behaviour Energy absorption |
| title | Shell offset enhances mechanical and energy absorption properties of SLM-made lattices with controllable separated voids |
| title_full | Shell offset enhances mechanical and energy absorption properties of SLM-made lattices with controllable separated voids |
| title_fullStr | Shell offset enhances mechanical and energy absorption properties of SLM-made lattices with controllable separated voids |
| title_full_unstemmed | Shell offset enhances mechanical and energy absorption properties of SLM-made lattices with controllable separated voids |
| title_short | Shell offset enhances mechanical and energy absorption properties of SLM-made lattices with controllable separated voids |
| title_sort | shell offset enhances mechanical and energy absorption properties of slm made lattices with controllable separated voids |
| topic | Selective laser melting Sheet lattice Triply periodic minimal surface CT reconstruction Mechanical behaviour Energy absorption |
| url | http://www.sciencedirect.com/science/article/pii/S0264127522002519 |
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