人工きず入り新幹線電車車軸の疲労試験結果に対する破壊力学的評価

概要

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The purpose of the fatigue test is to evaluate the nonpropagating depth limit of fretting fatigue cracks that can be initiated at the inner end of the wheelseat of a Shinkansen vehicle axle by linear elastic fracture mechanics. Considering the artificial flaw as an ideal crack, the result of fatigue tests such as the difference in crack growth behavior according to the depth of artificial flaws can be explained by the stress intensity factor range ΔK_r. 'The difference in crack growth behavior of flaws created on the gear-side wheelseat and the counter-gear-side wheelseat can also be explained by ΔK_r. ΔK_r is calculated using the weight function method from the residual stress distribution at the wheelseat and FEM analysis on the initiated stress distribution, considering a relative slip generated between axle and wheel at the inner end of the wheelseat during the fatigue test.
社団法人日本機械学会の論文
1994-10-25