An elastic stress formulation was expressed for the square tubular case (CFBS : anisotropic panel) of the corrugated fiber board box shape (width L, height h) under uniform compression p
y0 at centers in upper and lower edges. Then from this formulation the stress analysis is performed, and maximum values (σ
xmax, σ
ymax, τ
xyma, σ
1min and τ
1max) for normal stresses σ
x and σ
y to width and height directions and shear stressτ
xy, principal stressσ
1 and principal shear stress τ
1 were obtained and characteristic behaviors for σ
xmax, σ
ymax, τ
xymax, σ
1min and τ
1max were discussed.
Rates of values σ
x and τ
xy for the anisotropic case to the isotropic are about ν
xy E
x⁄E
y and σ
ymin⁄ (σ
ymin-σ
xmin) respectively. Ex and Ey are elongational elastic moduli in width and height directions and ν
xy is Poisson’s ratio (strain effect for height direction normal strain to width direction normal strain) . Positions of σ
ymin and σ
1min are in the loading range of upper and lower edges and are independent of the case shape change, and τ
xymax and τ
1max change as be at positions of distance L⁄2±Δx from corners in upper and lower edges with increases of L and the loading range.
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