Characterization of Mechanical Properties of CNFs and the Assembled Microfibers Through a Multi-scale Optimization-Based Inversion Method

Cellulose nanofibrils (CNFs) and the continuously assembled microfibers have shown transversely isotropic behavior in many studies. Due to fact that size of CNFs is at nano micro scale, respectively, characterization their mechanical properties extremely challenge. That greatly hinders accurate multi-scale modeling design CNFs-based materials. In our study, we characterized elastic constants both through a Multi-scale Optimization Inversion technology. Through tensile test reinforced resin with different volume fractions micromechanics model resin, microfiber can be backed out via Particle Swarm (PSO) method. Next, scale are derived based on previously obtained fibers second-time optimization-based inversion process. These results provide foundation for an materials structures.