A 6-ring embedded strain sensor

The proposed embedded strain sensor consists of six elastic rings, placed in an icosahedral symmetry, whose measured elongations give access to the complete 3D tensor surrounding matrix. linear relationship between ring and matrix is given. From this relation it deduced that isotropic, i.e. its sensitivity independent rotation more sensitive hydrostatic strains than deviatoric strains. additional perturbation field matrix, induced by presence sensor, studied means a numerical integration Kelvin solution use two dimensionless factors relating geometry elasticity. study we obtain, generic way, evaluation intensity value measurement bias due elasticity ring, which allows practice reduce bias. A draft realisation proposed, for verified disturbance as well be corrected are small.