- Author
- Linden, M. P. | Minor, J. E. | Vallabhan, C. V. G.
- Title
- Evaluation of Laterally Loaded Laminated Glass Units by Theory and Experiments. Supplemental Report No. 1.
- Coporate
- Texas Tech Univ., Lubbock
- Sponsor
- Monsanto Plastics and Resins Co., St. Louis, MO
- Report
- Supplemental Report No. 1, July 1984, 66 p.
- Distribution
- Available from National Technical Information Service
- Keywords
- glass | laminates | windows | glazing materials | tests | stress (mechanics) | pressure | thickness | failure
- Identifiers
- window glass; plate glass; lateral pressure
- Abstract
- In this supplemental study, findings of the parent study were corroborated for a different plate geometry. Also examined were the effects of long term loading and different interlayer thickness. Finally, a comparison was made between failure strength of laminated glass units and monolithic units of comparable glass thickness and geometry. Doubling the interlayer thickness had no significant effect on response of layered glass units. Under long term loading (3500 seconds), deflection and principal stresses stabilized about five seconds after a constant pressure of 0.2 psi was applied. At room temperature, both maximum dfelection and maximum principal stress in laminated units then increased linearly at nominal rates of 15% and 21% per hour, respectively. At elevated temperature (170 deg F) deflection response was comparable, but maximum stress increased 26% within 1000 seconds, then plateaued at slightly below its peak value during the remainder of the test period. At room temperature, laminated glass units had mean failure pressure 22% higher than the mean failure pressure of monolithic units of equal geometry and comparable glass thickness. At elevated temperature (170 F), mean failure pressure of laminated units was 27% lower than that of monolithic units at room temperature.