Fragmentation model for tensile behavior of intermingled hybrid composites and optimal mixing ratio

A numerical fragmentation model is proposed to predict the mechanical response of intermingled, unidirectional hybrid composites under tensile loads. The based on a previously developed for considering critical number fiber breaks and correction fiber-matrix interfacial strength. Hybrids comprising two reinforcements are considered, energetic contribution evaluated during damage process. Additionally, pseudo-ductile strain, yield strength, level degradation each reinforcement estimated. present compared with progressive failure micromechanical finite element simulations, obtaining some similarities in stress-strain behavior. Results show that both low elongation high sub-composite experience linear where fibers remain intact (IF), (FM) breaking appears. sliding/separation phenomenon (SS) occurs one sub-composites when crack saturation obtained, other undergoes saturation. also IF, FM, SS phenomena conditioned by mixing ratio, α. allows estimating optimal value α which highest strain effect reached.