EVS-EN 820-5:2009

This part of EN 820 describes methods for determining the elastic moduli, specifically Young's modulus, shear modulus and Poisson's ratio, of advanced monolithic technical ceramics at temperatures above room temperature. The standard prescribes three alternative methods for determining some or all of these three parameters: A  the determination of Young's modulus by static flexure of a thin beam in three- or four-point bending. B  the determination of Young's modulus by forced longitudinal resonance, or Young's modulus, shear modulus and Poisson's ratio by forced flexural and torsional resonance, of a thin beam. C  the determination of Young's modulus from the fundamental natural frequency of a struck bar (impulse excitation method).