Abstract
In this study, metallic pyramidal lattice truss core sandwich structures, including single-layered as well as multi-layered ones, are fabricated from EOS Aluminium AlSi10 Mg, utilizing additive manufacturing method. Out-of-plane and in-plane compression as well as shear tests were carried out in order to measure the stiffness and strength properties of the structures. The out-of-plane compressive strength is determined by buckling of struts, and specimens fail in plastic yielding of face sheets for in-plane tests. And for the shear performance of the specimens, the strength is dominated by the node failure. In addition to experimental testing, finite element models have been developed for simulating the stiffness and strength properties and the numerical results agree well with experimental performance.
| Original language | English |
|---|---|
| Pages (from-to) | 1298-1306 |
| Number of pages | 9 |
| Journal | Mechanics of Advanced Materials and Structures |
| Volume | 26 |
| Issue number | 15 |
| DOIs | |
| State | Published - 3 Aug 2019 |
Keywords
- Sandwich panels
- additive manufacturing
- mechanical response
- pyramidal truss core
- strength
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