Abstract
The Glass/Polycarbonate (G/PC) laminated safety glass, which is bonded by acrylic interlayer (ACIL), is often applied for the viewing port of the machine tools. The viewing port for the machine tools requires impact resistance, transparency, and solvent resistance. The G/PC laminated safety glass has excellent characteristics to satisfy above requirements. Recently, thinner structure and weight saving has been more required for the G/PC laminated safety glass. Impact absorption capacity of the G/PC laminated safety glass is influenced by the mechanical properties of ACIL. In this study, we focused on cellulose nanofibers (CNFs) that have high stiffness and strength. We investigated effects of concentration and aspect ratio of CNFs on tensile properties of ACIL with CNFs experimentally and analytically. Tensile tests were carried out to evaluate stress-strain (S-S) curves and effects of concentration and aspect ratio of CNFs on the hyper elastic properties of ACIL with CNFs was discussed. Finite element analysis (FEA) of hyper elastic properties of ACIL with CNFs was also conducted by using Digimat-FE software. Using three-dimensional representative volume element (RVE) models, effect of concentration and aspect ratio of CNFs on the hyper elastic properties of ACIL with CNFs were evaluated. As a result, the stress of ACIL containing CNFs with high aspect ratio obtained by tensile test was markedly increased in high strain region more than neat ACIL. On FEA, increasing CNF concentration showed increased stress of S-S curve. Also, effect of aspect ratio was remarkable at 5wt%.
