METHOD AND APPARATUS FOR MEASURING FLEXURAL MODULUS OF VISCOELASTICITY OF SOLID

摘要

PURPOSE:To measure flexural modulus of viscoelasticity by increasing displacement sensitivity, by forming a specimen both-end support jig as a specimen length freely adjustable mechanism and freely supporting a specimen by a predetermined angle circular end surface wedge having contact surface pressure adjustable around the support point of the specimen to apply vibration to the center of the specimen. CONSTITUTION:The vibration of a vibration driver 1 is applied to a displacement detector 2 and the vibration of the detector 2 is applied to a drive chuck 3. The chuck 3 transmits driving force to a specimen 5 in such a state that the center of the specimen 5 is freely supported by a drive chuck wedge comprising a buffer edge 4 having a blunt angle at the leading end thereof. Both ends of the specimen 5 are supported by fixed chucks 6. Support metal jigs 7W consisting of two wedges are placed only to the single sides of the driver side of the chucks 6 and the specimen 5 always receives static pressure in the driving side to be contacted with the wedges 7W under pressure and the amplitude of measuring vibration is limited to static pressure or less. Two chucks 6 are fixed on a bow shaped yoke 8 so as to make the length of the specimen 5 adjustable and the yoke 8 is fixed to a machine stand 10 through a load detector 9. By this method, displacement sensitivity is increased and the modulus of viscoelasticity of the specimen can be measured.