Measurement of creep-induced localized residual stress in soda-lime glass using nano-indentation technique

Localized contact-creep was used to generate residual compressive surface stress in soda-lime glass. When ceramic or glass material creeps under a localized stress and then is cooled under load, a portion of the creep stress is retained as a residual compressive stress due to elastic rebound being constrained by the creep zone. Nano-indentation technique was used to measure the residual stress within the contact-creep area. The results were in reasonable agreement with the estimated stress distribution given by Finite Element Analysis.