縦衝撃を受ける弾性/粘塑性円管の動的挙動

概要

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Two-dimensional stress waves in elastic/viscoplastic circular tubes were analyzed numerically, when axisymmetric impacts were applied to the end face of the tubes. For the numerical analysis, the finite difference method based on integration along bicharacteristics was employed. By obtaining the numerical results for the cases of various sizes of the tube, and of the impact loading condition, it was confirmed that when the rise time of the applied impact velocity is sufficiently short, and when a viscoplastic deformation takes place near the impact face, the maximum value of the caused tensile stress is much smaller than when only an elastic deformation takes place. Even when the viscoplastic deformation takes place, the possibility of the occurrence of the impact fracture in the cylinder containing a small-coaxial hole is much higher than the case of a cylinder with no hole.
一般社団法人日本機械学会の論文
1989-07-25