A bi-parametric Wöhler curve for high cycle multiaxial fatigue assessment
A bi-parametric Wöhler curve for high cycle multiaxial fatigue assessment
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DOI：
10.1046/j.1460-2695.2002.00462.x
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发表时间：
2002-01
影响因子：
3.7
通讯作者：
L. Susmel;P. Lazzarin
中科院分区：
文献类型：
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作者：
L. Susmel;P. Lazzarin
提出了一种估算多轴载荷下高周疲劳强度的方法。疲劳损伤的物理解释是基于单晶循环变形理论。这样的理论也被用来挑出那些应力分量，这些应力分量可以被认为对所谓的I阶段裂纹形核和扩展有重要意义。疲劳寿命的估计是通过改进的维勒曲线进行的，该曲线可以应用于光滑和钝切口部件，承受同相或非同相载荷。修正的Wohler曲线用最大宏观剪应力幅值来绘制疲劳强度图，参考平面-必须对这些振幅进行评估-被认为与疲劳微裂纹起裂面一致。疲劳强度曲线的位置还取决于垂直于该平面的应力分量和相位角。从文献中选取了约450个实验数据来验证该方法在多轴疲劳条件下的准确性。
This paper presents a method for estimating high-cycle fatigue strength under multiaxial loading conditions. The physical interpretation of the fatigue damage is based on the theory of cyclic deformation in single crystals. Such a theory is also used to single out those stress components which can be considered significant for crack nucleation and growth in the so-called Stage I regime. Fatigue life estimates are carried out by means of a modified Wohler curve which can be applied to both smooth and blunt notched components, subjected to either in-phase or out-of-phase loads. The modified Wohler curve plots the fatigue strength in terms of the maximum macroscopic shear stress amplitudes, the reference plane - where such amplitudes have to be evaluated - being thought of as coincident with the fatigue microcrack initiation plane. The position of the fatigue strength curve also depends on the stress component normal to such a plane and the phase angle as well. About 450 experimental data taken from the literature are used to check the accuracy of the method under multiaxial fatigue conditions.