➀ Researchers at the University of Glasgow have developed 3D-printed lattice-like composites that can detect their own strain, load, and damage. ➁ The material, made from a PEI polymer mixed with carbon nanotubes, is designed to monitor its own performance without additional hardware. ➂ The team has created a complete theoretical model of the substance's piezo resistivity, allowing for accurate prediction of the material's response to stress and strain.