ハイブリッド複合材料の複素弾性係数

Abstract

In case fiber reinforced plastics are used as construction members, they are often used as the form of combination of different FRP so called hybrid composites.It is necessary for designing the constructions to investigate the dynamical viscoelastic behavior of this material when it is subjected to forced vibration.Analysis of complex modulus of elasticity which expresses not only the rigidity of the material but also the degree of energy absorption as the vibration or sonic absorber is very advantageous problem for this material. For this purpose, the author established a theoretical method which relates the complex modulus of elasticity and the alignment of unit composites to the dynamical behavior of the hybrid composite.Resonance vibration tests by bending were carried out with test specimens, and the appropriateness of this method were verified. For the mathematical calculation, a new programing soft ware for electronic computer was developed.By this study we can control the dynamical viscoelastic properties of hybrid composite materials at the preparing process. Thus raw materials of composites are able to be used efficiently and the fundamental data for designing become to be obtainable.