Identification the interface fracture parameter by inverse analysis: Application of Kalman-filter technology

In this paper, Kalman filter technology which originally came from the field of signal control is introduced as an inverse analysis to identify some important material parameters. By performing detailed FEM simulation and using the experimental data of the force and displacement curve of the fiber pull-out test, the Kalman filter recursive process is successfully carried out to identify the values of the shear strength τ and the fracture energy G for the SiC (SCS-6) / Ti material interface. The great advantage of this inverse technology is that the influence of experimental noise can be taken into account. The calculation results show that the rate of convergence to the correct solution depends on the number and the initial estimation of unknown parameters to be identified and the accuracy of the measured data. Our analysis demonstrates that the proposed approach is suitable and capable in the identification of material parameters of the composite interface.