Toward Triboluminescent Sensor Realization for SHM: StatisticalModeling of Triboluminescent Composites

摘要

Triboluminescence (TL) is a mechanical and luminescent phenomena enabling damage sensing capabilities inmaterials. Depending on material compound, various excitation mechanisms result in emissions stimulated byrubbing or fracture, and give an indication of internal stress. Design of Experiments helped ascertain experimentalknowledge of the multiphase composite system containing ZnS:Mn phosphors (0 – 40%) and vinyl ester resin(VER). This statistical approach proffered an empirical model used to validate triboluminescent production. Datashows concentration compiled with impact energy has a significant effect on the luminous intensity. Light intensitywas measured by a photomultiplier tube and a photo-voltaic detector. The signal intensity range was determined foreach. The photovoltaic detector acts as a low-light sensor in the range of 0.61 - 0.116 A for impacts less than 0.4 J.Microscopy revealed plates with reasonable dispersion and view of micro-structural inclusions. DMA indicates theinclusion of ZnS:Mn produces a moderate change in Young's modulus and thermo-kinetic properties.