A formulation of the anisotropic elastic deformation was performed for the single wall corrugated fiberboard (SWCF) under the uniform tensile load. From this formulation the anisotropic longitudinal elastic modulus was determined for SWCF induced by elastic moduli of anisotropic element materials, and the validity of the formulation was guranteed by experimental results under the tensile deformation. Farther the anisotropic character for the modulus was elucidated.
The deformation of SWCF obtained from the formulation shows the remarkable anisotropy. The anisotropy of SWCF increases with increase of the wavelength for semichemical corrugating medium (SCM), and decreases with increases of the thickness and the waveheight of SCM.