Debonding or decohesion along a fiber-matrix interface frequently becomes the main mode of failure of a composite structure. Hence, a methodology to evaluate the decohesion is of interest of many scientists and engineers. Unfortunately, many existing methods such as the micro-bond method, the fiber pullout method, and the fiber push-out method are too restrictive in term of the specimen design and the rate of loading. In this work, we propose a methodology to characterize the decohesion at various loading rates and verify the method experimentally. This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.