Quantum dot(QD)composite films are potential candidates for meso-scale stress/strain sensing in the interior of materials under quasisatic and shock loading.One requirement in this development is the establishment of calibrated relations between shifts in the emission spectrum of QD systems and input stress/strain for the composites.Investigation of the relations involves physics at multiple length scales: stress distribution and evolution in the film,interactions between the matrix and QDs,deformation and phase transformation of the nanoscale QDs and electron-related band structures which determine the optical properties of QDs.The multiscale nature of the analysis requires suitable multiscale modeling schemes which take into account of relevant underlying mechanisms.Here,we present a multiscale computational framework for quantifying the strain-dependent blueshift in the emission spectrum of CdTe QDs randomly distributed in a matrix of polymer or glass under loading of a range of stress or strain triaxiality.The framework,which combines the finite element method,molecular dynamics simulations and the empirical tight-binding method,captures the matrix/QD interactions,possible deformation-induced phase transformations and strain-dependent band structures of the QDs.Calculations reveal that the response of the QDs is strongly dependent on the state of input stress(strain).Under hydrostatic compression,the blueshift increases monotonically with strain.Under compression with lateral/axial strain ratios between 0.0 and 0.5,the blueshift initially increases,reaches a peak at an intermediate strain,and subsequently decreases with strain.This trend reflects a competition between increases in the energy levels associated with the conduction and valence bands of the QDs.The deformation-induced blueshift is also found to be dependent on QD orientations.The quantitative relations obtained allow the design of stress/strain sensors via systematic selection of QD size and matrix material.