EFFECTS OF ADHESION ON THE EFFECTIVE YOUNGS MODULUS IN GLASS SLIDE GLUE LAMINATES .1. EXPERIMENTS

Bond-phase defects in laminates can affect the mechanical properties o f laminate composites. In this study, the effects of adhesion area, nu mber of glue spots, and bond thickness on the effective Young's modulu s of adhered microscope glass slides have been investigated. Three dif ferent adhesive agents (super glue, epoxy cement, and epoxy resin) wer e used to explore the effect of bond-phase defects upon adhesion in la minates. The elastic moduli of single glass slides, unadhered glass sl ide pairs, glass slide/glue composite specimens and epoxy resin specim ens were non-destructively determined by a sonic resonance technique. The change of Young's modulus of adhered glass slides was monitored wh ile adhesion area per cent ranged from 0.35%-100%. Trends in the Young 's moduli of glass slide/glue composite specimens have been analysed b y a least-squares best-fit procedure to two empirical equations. Quali tative explanations for the observed trends are discussed in this pape r.