Abstract
In this study, a method for identifying the material characteristics of bi-material from measured displacements is proposed. The virtual fields method is employed for determining the material characteristics of bi-material. Three-point bending test and tensile test are performed for verification of the proposed principle. Specimen is obtained by bonding the polycarbonate and acrylic resin. Displacement distributions on a specimen surface are measured using digital image correlation. Special virtual displacements capable of reducing the measurement error of the strain are used as an input values. Then, the inverse analysis of material characteristics from the displacements under various loads is carried out. Result of the bending test occurred an error between the experimental value and correct value. However, the accurate identification result can be obtained in the tensile test. On the other hand, the result of this time, there was no effect on the results due to differences in the number of elements.
