Estimation of thermophysic properties of a bimaterial by temperature field measurement and finite element model updating

The aim of this study is to identify simultaneously the thermal conductivity tensor and heat capacity per unit volume a bimaterial, whose conduction obeys Fourier’s law. This approach validated by numerical simulation. simulated temperature fields are obtained direct resolution equation solved numerically with help finite element method formulation. To parameters, an inverse developed using model updating (FEMU) based on Levenberg-Marquardt algorithm. allowed us estimate thermophysical parameters sought. We procedure noiseless at different time space steps two types material: homogeneous bimaterial one. be close real conditions, influence noise also studied shows efficiency method. results show that identified very less sensitive number infra-red images varying from 40 80 elements ranging 20 50 for specimen size equals 36.6 × mm 2 .