一様曲げ(流れ方向曲げ)を受ける段ボールの弾性応力解析 : 表面異材のKLをもつ両面段ボール

概要

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A method of elastic analysis is studied for SCF {single-wall corrugated fiberboard made of different kraftliners (KL : KL_1 and KL_2)} under uniform bending in the moment axis perpendicular to the machine direction. The numerical calculation is performed according to this analysis method. The following results are obtained. The Maximum stress σ_<k1 max> (maximum of absolute stress for KL) is on the outer surface of the thin KL (thickness T_<k1> of KL_1<thickness T_<k2> of KL_2), and increases with the decrease of T_<k1> and the longitudinal elastic modulus for the KL_1. The maximum stress σ_<s max> for SCM (semichemical corrugating medium) is at the KL・SCM joint on the inner SCM surface of the thin KL side. Consequently, σ_<s max>decreases with the decrease of the wavelength and with the increase of the wave height and T_<k2> for SCM. The change of σ_<s max> with the change of T_<k1> is small in comparison to the change of σ_<k1 max> within the range of change rate 0.3 (=ΔT_<k1>/T_<k1>) for T_<k1>.
1995-07-25