Especially, polylactic acid (PLA), which is plant-derived and biodegradable resin, has been receiving attention as an environmentally friendly material. Since GFRP in which thermosetting resins are used as a matrix is difficult to recycle, thermoplastic resins superior in recyclability have been receiving attention. Glass Fiber Reinforced Plastics (GFRP) have been used for various applications such as automobiles, motorboats and so on. As a result of finite element analysis, attenuation of the predicted velocity of impactor after collision became stronger when shear failure stress of PC-ACIL adhesive interface in the G/PC laminated safety glass increased. However, the fracture surface of the specimens with PC-CNF/ACIL adhesive interface showed the same damage state at different CNF concentrations in ACIL. Also, damage states in fracture surfaces of the specimens with G-CNF/ACIL adhesive interface were changed by increasing CNF concentration in ACIL. As a result of experiments, the adhesive strength of the specimens with G-CNF/ACIL and PC-CNF/ACIL adhesive interfaces decreased when CNF concentration in ACIL increased. In addition, finite element analysis (FEA) of the drop weight tests of the G/PC laminated safety glass considering adhesive strength at interfaces was carried out using LS-DYNA. Cleavage tests and tensile shear tests were performed on specimens with G-CNF/ACIL and PC-CNF/ACIL adhesive interfaces, and the effects of loading mode and CNF concentration in ACIL on the adhesive strength of the specimens were discussed. The objective of this study was to investigate the adhesive strength at G-CNF/ACIL and PC-CNF/ACIL adhesive interfaces. However, the effect of the adhesive properties of CNF/ACIL on the impact resistance of G/PC laminated safety glass incorporating CNF/ACIL is unclear. In previous research, the G/PC laminated safety glass incorporating ACIL with CNFs (CNF/ACIL) showed an enhanced impact resistance. We focused on cellulose nanofibers having a diameter of a few dozen nanometers and a high aspect ratio as a filler in ACIL to enhance the impact resistance of G/PC laminated safety glass. These requirements can be satisfied by glass/polycarbonate (G/PC) laminated safety glass incorporating acrylic interlayer (ACIL). Safety glasses used in machine tools require good impact and solvent resistance, and high transparency.
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