Modelling Of Time Strength Behaviour Of Soda-Lime-Silica Glass In Moist Environments

The time strength behaviour of alkali silicate glasses depends on the environmental media and external stresses during ageing as well as on the type of initial crack (damage). An extended crack growth model based on the competing processes of crack growth and its retardation due to stress-enhanced alkali leaching in moist media has been implemented on a computer. Considering residual contact stresses, this model is able to simulate crack arrest, strength increase (or decrease) during ageing under load, static and dynamic fatigue including strength distributions of various soda-lime-silica glass applications. Lifetime prediction of static fatigue can be improved by about 10 years.