This post is also available in:
עברית (Hebrew)
Soft robots are often designed for a single task. Once their structure and internal wiring are set, their range of motion is fixed, limiting adaptability. If a robot needs to perform a different function, such as gripping a new object or operating in a different environment, it typically requires a complete redesign. This lack of flexibility has slowed the broader adoption of soft robotics in dynamic, real-world scenarios.
A new type of artificial muscle aims to overcome this limitation by introducing reconfigurability directly into the material itself. Instead of fixed electrodes that define movement, the system uses a phase-changing substance that can shift between solid and liquid states. This allows the internal structure of the actuator to be reshaped even during operation.
According to TechXplore, the material behaves as a stable solid under normal conditions but becomes fluid-like when exposed to heat or magnetic fields. In this state, it can be repositioned, split, or merged into new configurations. Once reset, it solidifies again, enabling a completely different movement pattern without rebuilding the robot.
This approach allows a single actuator (a new type of dielectric elastomer actuator; DEA) to perform multiple functions. A robot can switch from bending to expanding or adopt entirely new motion patterns depending on how its internal structure is arranged. The result is a system that adapts in real time rather than being locked into predefined behavior.
Another key feature is resilience. If the material is damaged, either mechanically or electrically, it can restore itself by reflowing into the affected area. This self-healing capability allows the system to recover functionality without external repair. In addition, the material can be extracted and reused, supporting multiple cycles without significant loss of performance.
From a defense and homeland security perspective, such adaptability could be valuable in unpredictable environments. Robots capable of reshaping and repairing themselves may be better suited for missions in confined, hazardous, or rapidly changing conditions where traditional systems struggle.
As materials and robotics continue to converge, embedding flexibility, recovery, and reusability into a single system may redefine how machines are designed, moving from fixed-function devices toward adaptable platforms capable of evolving with their tasks.
The research was published here.
