Analysis of the localized deformation of sheet metal under uniaxial tension.

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  • 単軸引張下のくびれ変形の解析
  • タンジク ヒッパリカ ノ クビレ ヘンケイ ノ カイセキ

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Abstract

The localized deformation of sheet strips of mild steel and aluminum with various thickness subjected to uniaxial tension are experimentally investigated by the use of the Moire method. These results are compared with theoretical ones calculated by the use of the elastic-plastic finite element method considering the effect of large deformation on the basis of J2-flow theory and Gotoh's Vertex theory. The upper limit of thickness for the onset of localized necking of band-type is found to be dependent on the material properties. Gotoh's Vertex theory gives an evident localized necking of band-type in a diffusely necked thin strip, which clearly verifies its effectiveness over a large deformation range.

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