PAPERS |
Hiromichi ISHIDUKA, Yasutomo ODA,
Tsuyoshi YAGI, Masayuki TAHARA
In order to create some fatigue design diagrams for welds of aluminum alloy carbody shell, fatigue tests were carried out. The weld of hollow extrusions of the doubled-skinned shell and the two kinds of reinforcement welds of the single-skinned shell were chosen as representatives of welds of carbody shell. The fatigue design diagram for the weld of hollow extrusions was created through the statistical treatment on the S-N curve obtained from the fatigue tests using small and full-scale test pieces, and also the common diagram for two kinds of the reinforcement welds of the single-skinned shell was created in the same manner using full-scale test pieces. Those diagrams evaluate the fatigue strength by the stress range of the mother material in the vicinity of weld.
Copyright (c) 2006 Railway Technical Research Institute