Measuring and modeling fiber bridging: Application to wood and wood composites exposed to moisture cycling

We propose a new method for determining fiber-bridging, cohesive laws in fiber-reinforced composites and in natural fibrous materials. In brief, the method requires direct measurement of energy released during crack growth, known as the R curve, followed by a new approach to extracting a cohesive law. We claim that some previous attempts at determining cohesive laws have used inappropriate, and potentially inaccurate, methods. This new approach...