2-Point Bending Strength of Glass Fibers
Masato INOUE, Satoshi YOSHIDA, Jun MATSUOKA, Yoshinari KATO and Hiroki YAMAZAKI
Abstract:Failure strains of some glass fibers were measured by 2-point bending test at liquid nitrogen temperature. The failure strength was estimated from failure strain and Young's modulus of glass. At a face-plate rate of 50 ƒÊm/sec, failure strains were 12 % (failure strength is 8.6 GPa) for silica glass, 15 % (10 GPa) for soda-lime glass and 16 % (10 GPa) for lead glass, respectively. High failure strength of lead glass fiber suggests that 2-point bending strength of glass fiber is determined not only from interatomic bond strength but also from inelastic energy dissipation on fracture. Key Words:Glass fiber, Fracture, 2-point bending test, Young's modulus, Failure strain, Failure strength