Tempered glass and fragment sizes - The frangibility

Abstract

Tempered glass fractures into smaller pieces compared to ordinary float glass. Explanation is developed residual stress system during cooling from tempering temperature. Compressive stress of glass surface encases core under tensile stress. Compressed air cools surface instantly leaving core at greater temperature. Fragmentation of tempered glass is initiated by tensile stress at core. Surface defects and nickel sulphide content in compositions have been additional factors to induce variation in fragment sizes. Hardness evaluation and modeling is studied in this article to understand frangibility