衝撃壓縮による塑性柱の變形に就て

概要

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In this paper the distribution of the stress and strain along the long plastic column under axial shock type load were investigated theoretically with some aid of experiments using plastic material such lead bar. In this theoretcial cal〓ulation, following assumptions have been used in the relation between dynamical stress and strain when the column is subjected to the axial shock type load 1. The impact stress is represents by the sum of the stress proportional to the strain and the stress proportional to the straining speed which produced by the impact, and the relations are preserves up to the column has buckled. 2. The elastic deformation is of little importance compared to the plastic deformation. The results obtained by the investgations are as follows : 1. The mode of the plastic deformation and the stress destribution along the column under axial impact have been shown by hyperbolic expressions.2. Additional stress proportional to the straining speed has been obtained as the coefficient of viscosity in the plastic range. 3. The ratio of shock type stress and strain which correspond to the Young's modulus were obtained as the parameters of straining speed of the element of the column. 4. The stress-strdin diagram in the case of impact loading were obtained as the transition curve across a point of different stress-strain curves which obtained as the parameter of straining speed.
社団法人日本船舶海洋工学会の論文
1947-10-25