(Image: QUT) A material solutionĪt scale, composites embedded with these geometries could theoretically resist high impact or shock energy caused by gas explosions, earthquakes and wind forces, and car collisions. Dr Tatheer Zahra with her 3D-printed material. “The recent surge in 3D printing of auxetic materials has inspired me to develop these geometries using sustainable polymers especially for making cementitious auxetic composites for building protection, which is a flexible and in-house alternative to manufacture these materials,” Zahra added. Auxetic materials are often called metamaterials as these can be rationally designed to achieve high properties through advanced manufacturing methods, especially 3D printing. The geometry of these materials plays a key role in their properties. “This behaviour is mechanically defined as negative Poisson’s ratio behaviour - that is, a negative ratio of lateral strain versus longitudinal strain in any material - which enables auxetic materials to absorb shock and impact energies.” “The term auxetic refers to a material which tends to show negative behaviour, meaning they contract laterally when compressed in one direction or expand in all directions when stretched,” she said. A Queensland engineer has created a 3D-printed material to help protect buildings from damage caused by high impacts.Īn off-the-shelf bioplastic used to 3D print geometric shapes could help protect buildings from collision damage and other high impact forces, equivalent to a car travelling at 60 kilometres per hour.ĭr Tatheer Zahra from Queensland University of Technology (QUT) told create that she has long been fascinated by the unique behaviour of auxetic material.
0 kommentar(er)
