In this paper, piezoelectric composite specimens with epoxy resin adhesive for fixed-ratio mixed-mode (FRMM) fracture tests with photoelasticity analysis were performed. The deformation and strain field are obtained by digital image correlation (DIC) technologies, and the beam theory is used to calculate the critical fracture energies for piezoelectric composites. The values of SERR were calculated using the Virtual Crack Closure Technique and the traction-separation law for VCCT and CZM approaches respectively. Good agreement of the load-displacement response was obtained between the FEA and experimental results when using CZM approach. On the other hand, although the VCCT approach cannot …