Creating 3D objects from inextensible sheet materials

Researchers have developed an algorithm for creating complex objects by cutting holes in sheets of inextensible, but flexible materials such as metal, plastic and leather. It has potential applications in many areas, including microengineering, bioengineering, fashion and architecture. EPFL researchers, in collaboration with Carnegie Mellon University and the University of Hull, have come up with a method for creating everyday objects - like a mask or a shoe - from sheets of inextensible material. The process consists of cutting regular holes into the material so that it can be stretched and create complex 3D shapes. Previously, this was possible only with very simple objects. EPFL researcher Mina Konakovic and her team have now come up with an algorithm that clears the way to creating much more complex shapes using materials that are flexible yet inextensible, such as plastic and metal. Cutting regular geometric shapes into the material changes its properties and makes it auxetic - which means it can stretch in two dimensions at the same time.