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Cyclic Deformation Characters and Description of the Cast Steel for Chinese Railway Rolling Wagon Bogie Frames

机译：中国铁路货车转向架车架铸钢的循环变形特征及描述。

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Cyclic deformation characters and description method are investigated to the grade B cast steel for Chinese railway rolling wagon bogie frames. Incremental step test method with 8 strain amplitude loading mode were employed. Results reveal that the material acts as non-Masing behaviour with a significant Bausinger’s effect and appears a slight cyclic softening. Great of dimples in the transient fracture district indicate that present material is ductile. Significant discrepancy between the monotonic and cyclic beaviour was revealed to indicate that there is different monotonic and cyclic deformation behaviour. The scattered cyclic stress-strain relations indicate that appropriate description for the cyclic deformation of present material should be a probabilistic modeling. And then, a probabilistic modeling with measurements of survival probability and confidence is developed to give a good description to the cyclic deformation behaviour.
机译：研究了中国铁路轧制货车转向架车架B级铸钢的循环变形特性和描述方法。采用增量应变试验方法，采用8应变振幅加载模式。结果表明，该材料起非Masing行为的作用，具有明显的Bausinger效应，并且出现了轻微的周期性软化。短暂断裂区域的大量酒窝表明现有材料具有韧性。揭示了单调和循环行为之间的显着差异，表明存在不同的单调和循环变形行为。分散的循环应力-应变关系表明，对本材料的循环变形的适当描述应该是一个概率模型。然后，建立了具有生存概率和置信度测量值的概率模型，以很好地描述循环变形行为。

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