Macroscopic load-bearing and failure resistance of fiber composites are controlled by micro and meso-scale deformation mechanisms. Therefore, bridging between various length scales is the key to explore the origin of load-bearing and failure mechanisms in fiber-reinforced composites. 

One of our major research tracks involves the development of hybrid experimental/computational techniques that facilitate such multiscale characterizations. Our multiscale experiments allow for in situ characterization of thermo-mechanical deformation mechanisms ranging from sub-micrometer to meter length scales. 

We are particularly interested in the applications of digital image correlation (DIC) in multiscale characterization of fibers, matrix, and fiber/matrix interface. We use the DIC technique in conjunction with optical and electron microscopy imaging to understand the roles of individual fibers and fiber/matrix interface in macroscopic load-bearing performance of fiber composites. 

A particular research  interest in our group is the identification of load transfer mechanisms in fiber composites. Our goal is to use in situ measurements to identify how mechanical stresses/strains transfer from fibers to matrix and vice versa following the occurrence of different failure mechanisms, e.g. fiber/matrix interface debonding, transverse cracks, delamination, etc.