複合2層円管の平面ひずみ外周一様絞り下での変形挙動

概要

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Nonaxisymmetric bifurcation and post bifurcation behaviors of composite tubes with two different materials subjected to radial drawing at their outer edge have been investigated. The effect of material parameters normalized with respect to those of external tube on the bifurcation and surface type post bifurcation behaviors has been clarified, With regard to the bifurcation behavior, the yield stress and hardening exponent substantially affect the bifurcation point with long wave length bifurcation modes. Surface type bifurcation completely depends on the material characteristics of internal tube. However, bifurcation mode shapes change according to the change in hardening exponents. Surface type post bifurcation analysis clarifies that the effect of initial imperfection on the post bifurcation behavior is not remarkable, however, for the tubes with large bifurcation mode amplitude at boundary plane of the tubes, the strong strain localization starts near the boundary plane and then it extends to the in and out of the plane.
一般社団法人日本機械学会の論文
1989-04-25