Abstract
Elastic stress analysis was performed in SCP medium (SM) of wave shape (made of symmetrical parts of ellipus) for the corrugated fiberboard under the surface pressure. Also,relations between σ (bending stress) distribution and the SM shape were discussed. Following results were obtained.
(1)Maximum value σmax of |σ| appears at kraftliner・ SM joints on the inner surfaces. And ratio （σmax（partial epllipus）/σmax（sinusoidal） is 1～2, and gradually decreases with the increase of ratio r (half waveheight h/2 to radius of ellipus) in the waveheight direction.
(2)Maximal or minimal value of the stress is in the range of x = L/32～L/12 for SM, which L is wavelength and x is distance in the machine direction from the middle of the waveheight and the thickness T for SM. The position of σmax gradually increases from L/ 32 to L/12 with the increase of r.
(3)In ρ (radius of curvature for SM) ＞ T/2, σmax decreases conspicuously with the increase of T. σmax decreases sharply at ρ≒T/2 and increases slightly in ρ＞＞T/2 with the increase of L, and increases and decreases with the increase of h.
