Experimental Determinations of Elastic Constants Composite Materials, Carbon-epoxy and Graphite-epoxy, Using Two Dynamic Vibratory Techniques

두 가지 동적 진동실험을 통한 Carbon-epoxy와 Graphite-Epoxy복합재료의 동적 탄성계수 측정

Structures in current use are required of weight reduction and strength in many instances. This naturally necessitates frequent applications of composite materials in many areas. Elastic constants are one of key parameters in determining design guidelines for the specific applications of particular materials. In this research two vibratory techniques (acoustic resonance method and impulse technique)are utilized to evaluate elastic constants. Both techniques are suitable for the measurements of dynamic elastic constants. The Impulse technique provides a quick method for the measurement while the acoustic resonance method produces the values of elastic constants which agree better with theoretical values.