Measurement by an Automated Holographic System of Strain Distribution in Test Specimens of Composite Structural Materials

摘要

An investigation of the behavior of nonhomogeneous materials such as concrete or rock by means of holographic interferometry is presented. Double exposure holograms were used to determine the strain distribution on the whole surface of the sample. Holograms are recorded while the specimens are loaded by a press in a controlled situation. A computer controlled positioner gives the amount of the vectorial displacement of each point chosen on the sample. Preliminary results of nonhomogenous material specimen tests are reported.