Round-Robin Test Data For Elastic Moduli Of Silicate Glasses

The TC-6 committee of ICG on mechanical properties of glass, initiated the round-robin test for measuring the elastic moduli of silicate glasses in 1992. Seven laboratories around the world participated in the task force. Four of these laboratories carried out the measurement of elastic moduli by three different techniques, namely sonic resonance, ultrasonic pulse, and static flexture. Both soda-lime-silica and borosilicate (BK-7) glasses were tested in ambient environment. The results of these tests are presented together with the comparison of static vs dynamic moduli. The use of appropriate moduli for computing stresses from measured values of strain is discussed briefly.