直交異方性材料積層板の四点曲げ試験法

(II) 実験

抄録

This paper presents four-point bending tests to examine pure bending deformation of rectangular symmetric crossplies of fiber reinforced composites. The bending deformation is visualized and measured by holographic interferometry. Test results show that the pure bending deformation is realized, at least in a central portion of a specimen, provided that the aspect ratios of the specimen between the supporting and the loading points fall into certain ranges depending on the laminate composition. The higher the ratio of the axial to the transverse bending rigidity is, the greater the aspect ratios are required. These confirm the theoretical predictions made by a numerical analysis in a preceding paper of the authors'. Specific values of the aspect ratios are recommended for various laminate compositions.