平織層と一方向層からなるハイブリッドFRP積層板の内部応力・ひずみに関する研究

抄録

We analyzed microscopic stress and strain of hybrid laminate composed of two plain-woven-fabric-reinforced plastic (PW-RP) lamina and an unidirectional FRP lamina, applying our previous FEM approach for PW-RP lamina, and verified its results by the photoelastic experiment. The results of 3-D analysis show that the surface of hybrid laminate subjected to a uniform tensile deformation in the fiber direction of fabric is somewhat smoother than that of PW-RP lamina, but surface depression values of both hybrid laminate and PW-RP lamina are almost the same as that for tensile deformation in the direction of 45 degrees. Interlaminar stress is generated by restraint of the warp, and the highest value of interlaminar maximum shear stress appears at the portion closest to the weft.