DEVELOPMENT OF HYBRID METHOD COUPLING MOIRE INTERFEROMETRY AND FINITE-ELEMENT ANALYSIS

A hybrid method of stress analysis coupling moire interferometry and f inite element analysis to solve two-dimensional elasticity problems is proposed. This method has the advantage of reliability of experimenta l measurement and fastness of data reduction using the finite element method. In this method, the moire fringe patterns of u and v displacem ents are superimposed to form the optimal mesh pattern, ensuring the r equired density and grading of mesh, The u and v displacements obtaine d from moire fringe patterns are specified at the nodes to achieve rel iability of results. The concept and mathematical formulation of the h ybrid method are shown. The effectiveness of the method is tested on a problem of a disk under diametrical compression, resulting in a theor etical solution. A comparison of results indicates that the mesh forme d by the hybrid method and analyzed by an eight-noded isoparametric el ement provides accurate results and the same is also verified with sim ulated moire fringes of another example of cantilever beam. Copyright (C) 1996 Elsevier Science Ltd