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3D printed objects with variable elasticity developed
Using a new method developed by Disney Research, a 3D-printed teddy bear can have a stiff head, a flexible tummy and bendable arms, even though all of it is made of the same relatively stiff material. By using a printer to alter the small-scale structure of the material, the Disney researchers showed they could vary its elasticity dramatically.
New York: Using a new method developed by Disney Research, a 3D-printed teddy bear can have a stiff head, a flexible tummy and bendable arms, even though all of it is made of the same relatively stiff material. By using a printer to alter the small-scale structure of the material, the Disney researchers showed they could vary its elasticity dramatically.
They developed families of compatible micro-structures with varying elastic properties, enabling designers to select the properties desired for each region of an object. 3D printing usually involves only a single material or a very small set of materials. Metamaterials are substances that derive their bulk properties from the shape and arrangement of their micro-structures, rather than the composition of the material itself.
What the Disney Research team did was to use a variety of these metamaterials so that different regions within a single object could have different elastic properties. To create an object, these micro-structures measuring 8 mm on a side are tied together in the object's interior. The researchers created an algorithm for optimising the combination of these micro-structures, making sure that micro-structures of different shapes connect properly.
