ティ配管の実態材料強度と弾塑性FEM解析結果への影響

抄録

To collect the actual material strength of carbon steel tee pipe, a tensile test by cut-out test pieces was conducted. In addition, inelastic FEM analysis on a simple configuration of pipe specimen including a tee pipe was conducted. In the inelastic analysis, four kinds of yield stress settings were used, and the effect of yield stress setting was examined for out-of-plane static loading and for sinusoidal excitation. From the results of the tensile test, it was found that the yield shelf did not appear in the tensile test, and that the yield stress was approximately 1.6 times higher than the minimum yield stress determined by the JIS standard. This is considered due to the work hardening effect during the manufacture process of tee pipe. In the dynamic analysis under sinusoidal input, it was confirmed that the higher setting of yield stress brought the larger response acceleration and larger plastic strain accumulation.