振動法によるシェル鋳型のヤング率と強度について

Abstract

This paper describes some fundamental features obtained through application of the technique of measuring the sonic modulus of materials used in the field of ceramics to the nondestructive testing of mechanical properties of Shell Mold; namely, the authors try to find the relation of Young's modulus determined from the fundamental frequencies of prismatic samples to the modulus of rupture and the internal structure of the same samples that depends upon the packing properties of molding sand and physical properties of bonding materials, and considerable correlations are found between these quantities at least under limited conditions.