Astronomy & Space Sciences
Title : | Multi-material additive manufacturing of metamaterials with giant, tailorable negative
Poisson’s ratios |
Area of research : | Astronomy & Space Sciences |
Focus area : | Additive Manufacturing |
Contact info : | manikandan.sgk@iprc.space.gov.in |
Details
Executive Summary : | Materials with designed threedimensional micro-architectures offer multiple beneficial properties such as low weight, high stiffness and strength, negative poisson ratio and energy absorptions and can open up a myriad of material by design applications from flexible armor, responsive materials to bio-mimetic materials. Ultimately, one would like to 3D print functional device or components that incorporate multiple material constituents without the requirement of excessive assembling procedures such as gluing, aligning, fitting, and welding. Apart from enhancing spatial resolution and printing speed, achieving this goal requires the ability to incorporate an array of different material properties within a manufacturing platform. In analogy to typical 2D color printers that can integrate multiple colors from mixing a few colors (magenta, cyan, yellow), a three-dimensional fabrication platform should not only be able to integrate multiple colors, but also be capable of spatially integrating encoded material properties and compositions from mixing only a limited number of feedstock materials. A strategy to achieve unusual mechanical properties through coupling variable elastic moduli from a few GPa to below KPa within a single tissue to be evolved. The ability to produce multi-material, threedimensional (3D) micro-architectures with high fidelity incorporating dissimilar components has been a major challenge in man-made materials. The multimodulus metamaterials whose architectural element is comprised of encoded elasticity ranging from rigid to soft. In contrast to ordinary architected materials whose negative Poisson’s ratio is dictated by their geometry, these types of metamaterials are capable of displaying Poisson’s ratios from extreme negative to zero, independent of their 3D microarchitecture. The resulting low density metamaterials is capable of achieving functionally graded, distributed strain amplification capabilities within the metamaterial with uniform micro-architectures. Simultaneous tuning of Poisson’s ratio and moduli within the 3D multimaterials could open up a broad array of material by design applications ranging from flexible armor, artificial muscles, to actuators and bio-mimetic materials |
Co-PI: | Dr.S.G.K.Manikandan, ISRO Propulsion Complex (IPRC), Mahendragir |
Organizations involved