PHYBAL ― Short-time calculation of Woehler curves for wheel steels
PHYBAL ― Short-time calculation of Woehler curves for wheel steels
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PHYBAL - 车轮钢沃勒曲线的短时计算
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
D. Eifler
中科院分区：
文献类型：
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作者：
P. Starke;F. Walther;D. Eifler
机械应力-应变滞后，温度和电阻的测量进行的详细表征的铁路车轮钢SAE 1050和调质钢SAE 4140，都在铁路轮对中使用的疲劳行为。在伺服液压试验系统上进行了室温下的应力控制载荷增加和恒幅试验。所应用的测量方法依赖于变形引起的块体材料中微观结构的变化，并代表实际的疲劳状态。根据一次载荷增加试验和两次恒幅试验的疲劳数据，提出了疲劳寿命计算方法PHYBAL。用“PHYBAL”计算的仅基于三个疲劳试验测量值的Woehler（S-N）曲线与传统的实验测定的曲线吻合得很好。通过扫描电子显微镜进行微观结构表征，允许根据微观结构细节解释测量的物理数据。
Mechanical stress-strain hysteresis, temperature and electrical resistance measurements were performed for the detailed characterisation of the fatigue behaviour of the railway wheel steel SAE 1050 and the quenched and tempered steel SAE 4140, both used in railway wheel sets. Stress-controlled load increase and constant amplitude tests were carried out at ambient temperature on servohydraulic testing systems, The applied measurement methods depend on deformation-induced changes of the microstructure in the bulk material and represent the actual fatigue state. On the basis of experimental fatigue data determined in one load increase test and two constant amplitude tests the fatigue life calculation method "PHYBAL" was developed. Woehler (S-N) curves calculated with "PHYBAL" on the basis of only three fatigue test measurements agree very well with conventional experimentally determined ones. The microstructural characterisation was done by scanning electron microscopy, allowing to interpret the measured physical data on the basis of microstructural details.