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New manufacturing methods needed for ‘soft’ machines, robots

New manufacturing methods needed for ‘soft’ machines, robots

Purdue researchers have developed a technique to embed a liquid-alloy pattern inside a rubber-like polymer to form a network of sensors. The approach might be used to produce "soft machines" made of elastic materials and liquid metals for potential applications in robotics, medical devices and consumer electronics. (Rebecca Kramer/Purdue University)

Purdue researchers have developed a technique to embed a liquid-alloy pattern inside a rubber-like polymer to form a network of sensors. The approach might be used to produce "soft machines" made of elastic materials and liquid metals for potential applications in robotics, medical devices and consumer electronics. (Rebecca Kramer/Purdue University)

Researchers have developed a technique that might be used to produce “soft machines” made of elastic materials and liquid metals for potential applications in robotics, medical devices and consumer electronics.

Such an elastic technology could make possible robots that have sensory skin and stretchable garments that people might wear to interact with computers or for therapeutic purposes.

However, new manufacturing techniques must be developed before soft machines become commercially practical, said Rebecca Kramer, an assistant professor of mechanical engineering at Purdue University.

She and her students are working to develop the fabrication technique, which uses a custom-built 3D printer. Recent findings show how to use the technique to create devices called strain gauges, which are commonly found in many commercial applications to measure how much something is stretching.

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