TENSILE-STRENGTH MEASUREMENTS OF CERAMIC MATERIALS AT HIGH-RATES OF STRAIN

Ceramic materials are usually assumed linear elastic up to failure and the failure criterion is accustomed to be a limit condition related t o the tensile strength. Due to the difficulties associated with the un iaxial tensile test, some different alternatives have been posed such as Brazilian tests and spalling test of long bars. In this work, a com parative study of these methods has been broached. Specimens of alumin a and silicon carbide have been tested at different strain rates, show ing the influence of strain rate in the tensile strength values. The a nalysis provides results of the stress and strain state in the specime n.