Optical Coherence Straingraphy (OCS) was developed, which could visualize micromechanical information, e.g. strain, tomographically and non-destructively. This method can execute the speckle deformation analysis based on cross-correlation technique of synthetic images, which are captured before and after loading by Optical Coherence Tomography. In this study, applying OCS to Polymer Matrix Composites (PMCs), e.g. plain-woven fiber-reinforced rubber, the experimental feasibility study was carried out to evaluate micro-mechanics. In order to verify experimental results, it was compared with numerical ones obtained by image-based FEM. Consequently, OCS could discover the strain concentration in the vicinity of the intersection of orthogonally oriented fiber bundles. It was confirmed that tomographic strain distribution had qualitative agreement with the simulated one. Therefore, OCS was verified to provide mechanical properties non-destructively as internal strain distribution at the micro scale resolution.
