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首页> 外文会议>Asian Pacific Conference on Fracture and Strength;APCFS; 20061122-25;20061122-25; Sanya(CN);Sanya(CN) >A representative Stress Model Removing Weld Joint Type Dependency of S-N Curve
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A representative Stress Model Removing Weld Joint Type Dependency of S-N Curve

机译：消除S-N曲线焊接点类型相关性的代表性应力模型

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摘要

The hot spot stress or the notch strain alleviates the welding detail dependency of S-N curve to some extent. This paper suggests a new stress model which alleviates the dependency further, thus the fatigue strengths of several welding details of same material can be evaluated with the S-N curve of the base material. A stress at the hot spot of a weld joint is decomposed into two components; linear rising one, and rapid rising one which is inversely proportional to the distance from the hot spot. For the stress decomposition, a formula is proposed with which the configuration of stress distribution near a hot spot is fitted exactly. The new stress model makes use of a geometric characteristic of the stress distribution curve by the formula. The stress model is applied to five different weld joints. As the result, the experimental fatigue data are plotted very closely to the S-N curve of the base material
机译：热点应力或缺口应变在某种程度上减轻了S-N曲线对焊接细节的依赖性。本文提出了一种新的应力模型，该模型进一步减轻了这种依赖性，因此可以使用基础材料的S-N曲线评估同一材料的多个焊接细节的疲劳强度。焊接接头热点处的应力被分解为两个分量：线性上升一和快速上升一成正比，该距离与热点的距离成反比。对于应力分解，提出了一个公式，可以精确地拟合热点附近的应力分布。新的应力模型通过公式利用了应力分布曲线的几何特征。应力模型应用于五个不同的焊接接头。结果，实验疲劳数据非常接近基础材料的S-N曲线绘制

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