Subcritical crack growth and lifetime prediction of chemically strengthened aluminosilicate glass

摘要

Abstract The effect of residual stress on subcritical crack growth in chemically strengthened aluminosilicate glass in air and water was firstly investigated using the double torsion (DT) technique. An experimental evaluation procedure was developed based on the DT method. The research demonstrates that high compressive stress (CS) and low central tension (CT) in chemically strengthened glass are beneficial in improving crack growth index and decreasing susceptibility to fatigue. Chemically strengthened glass with high CS and low CT exhibits a smaller proof-test ratio, which indicates better survival characteristics. The results are useful in designing the strength and optimizing the strengthening process by ion exchange to obtain a more robust glass with long service lifetime. Graphical abstract The subcritical crack growth of chemically strengthened aluminosilicate glass in air and in water was firstly investigated using the double torsion (DT) technique. An experimental evaluation procedure has been developed based on the double torsion method. High CS and low CT for chemically strengthened glass show a smaller proof-test ratio, thereby indicating better survival characteristics. Display Omitted Highlights • Subcritical crack growth of chemically strengthened glass was firstly investigated. • An experimental evaluation procedure was developed based on the double torsion method. • High CS and low CT can improve crack growth index and decrease susceptibility to fatigue. • High CS and low CT for chemically strengthened glass have smaller proof test ratio.