An elastic analysis for side plates (breadth L=240-302.5 mm and height 207.5 mm) of the corrugated fiberboard case with grip holes (length ΔL
O=0.0-62.5 mm of parallel line, hole side radius r=12.5 mm of semicircle arc) applied uniform applied stress p in ΔL
O range was performed by finite element method, and from this analysis, stress components of their plates were considered.
Large absolute values of normal stresses σ
x and σ
y in breadth and height directions and shear stress τ
xy concentrate near upper edges and sides of holes. Maximum of |σ
x| is at centers of hole upper edges in ΔL
0<1.6 r and at centers of plate upper edges in ΔL
0>1.6 r, and maximum of |σ
y| is at centers of hole upper edges in ΔL
0<1.6 r and at hole sides in ΔL
0>1.6 r. And τ
xy is negative value and maximum of |τ
xy| is at centers of hole upper edges in ΔL
0<1.6 r and at positions r/2 along upper direction from hole sides in ΔL
0>1.6 r. Maximum values for σ
x and σ
y increase and maximum absolute values for minimum σ
y decreases with the ΔL
0 increase, and maximum absolute value for minimum σ
x and τ
xy decrease initially and increase with the ΔL
0 increase.
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