Hybrid FEM/grating interferometry analysis of displacement fields in mechanical elements

摘要

Abstract: In the paper the concept of interactive implementation of grating interferometry and FEM is proposed in order to provide additional information to properly design and control both numerical and experimental procedures. At first the information from global FEM approximate model is used to design interferogram and adjust experimental setup. Having the best fitted experimental conditions, the measurement is performed. The results are used to improve the FEM parameters e.g. size and shape of FEM grid and fit local experimental data to modified FEM model. To provide the proper experimental tool, grating interferometry with two-channel acquisition module (for instantaneous u and v displacement measurement) is applied. The concept is tested on the examples of analysis of bending ceramic-to-metal joint and laser beam weldment under tensile semiaxial load. !7