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3D printed titanium structure shows supernatural strength
A new 3D printed ‘metamaterial’ boasts levels of strength for weight not seen in nature or the manufacturing world.
Lattice structures made from hollow struts were originally inspired by nature: strong hollow-stemmed plants like the Victoria water lily or the hardy organ pipe coral (Tubipora musica) showed us the way in combining lightness and strength. However, as RMIT’s Distinguished Professor Ma Qian explains, decades of trying to replicate these hollow ‘cellular structures’ in metals has been frustrated by the common issues of manufacturability and load stress concentrating on the inside areas of the hollow struts, leading to premature failures. “We designed a hollow tubular lattice structure that has a thin band running inside it.
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