Multidirectional lattice +3d printing: a new artificial metamaterial is light and strong
the British journal Nature published a new achievement in materials science on the 16th: the team of Imperial College of Technology reported a new artificial metamaterial with increased strength but still light weight. This material is made of multidirectional lattice combined with 3D printing technology, and the new lattice is designed according to the basic principles of strong metal alloys
lattice structure is composed of repeated nodes and connecting pillars. Combined with 3D printing technology, the material produced is light and strong. However, once these materials fail, it will bring disastrous consequences. I don't think I can finish it in a lifetime, which limits their practical application. The reason for the failure lies in the single orientation of the structure lattice of these materials
the same phenomenon also exists in metal single crystals, which have similar structures, and the interior will slip and deform along a specific plane. It is mainly used to measure the ability of metal wires with a diameter or thickness of 0.5mm (6 mm) to withstand plastic deformation during the winding test process. However, in polycrystalline materials containing grains with different orientations, the grain boundary helps to prevent the sliding and crack further spreading under forming, so it can improve the ability of these materials to resist deformation
this time, scientists at Imperial College of technology simulated polycrystalline materials and designed a new lattice like metamaterial with granular structure, so that different regions of the internal lattice have different orientations
researchers found that granular metamaterials (also known as "phenocrysts") are stronger and more resistant to damage than traditional metamaterials when they are deformed. Like polycrystalline materials, the strength of "variable phenocrysts" can be enhanced by reducing the size of each granular lattice region
the research team created a special "variegated crystal" that can twist into different configurations after pressure, imitating similar heavy crystals in crystal materials, which are on the top row of this year's K exhibition. Taken together, these results will bring more robust and lightweight 3D printing materials suitable for various applications to the scientific communityThe iteration speed of new materials is not only related to scientists' understanding of the basic properties of materials, but also related to the efficiency of new theories and related verification, and even related to the innovation ability of production processes and simulation tools. Master the mystery, learn to adjust some parameters, and create new materials that meet the needs of production and life. This is the advantage of automatic temperature control and automatic change. Chemists are called "magicians"