Fatigue Assessment and Fatigue Life Calculation of Metals on the Basis of Mechanical Hysteresis, Temperature, and Resistance Data
Fatigue Assessment and Fatigue Life Calculation of Metals on the Basis of Mechanical Hysteresis, Temperature, and Resistance Data
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基于机械滞后、温度和电阻数据的金属疲劳评估和疲劳寿命计算
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;D. Eifler
机械应力-应变滞后、温度和电阻测量用于循环变形行为的微观结构相关表征和金属的疲劳寿命计算。电阻受缺陷密度的影响很大，并且允许在循环载荷下以及在无载荷检查间隔期间检测进行中的疲劳损伤。在综合机械、热和电疲劳数据的基础上，凯泽斯滕大学材料科学与工程研究所开发了基于物理的疲劳寿命计算“Phybal”。该方法只需要一次载荷增加试验和两次恒幅试验，就可以快速而精确地计算S-N（Woehler）曲线，从而大大减少了试验时间和费用。
Abstract Mechanical stress-strain hysteresis, temperature, and electrical resistance measurements were performed for the microstructurerelated characterisation of the cyclic deformation behaviour and for the fatigue life calculation of metals. The electrical resistance is strongly influenced by the defect density, and allows the detection of a proceeding fatigue damage under cyclic loading and during load-free inspection intervals as well. On the basis of comprehensive mechanical, thermal, and electrical fatigue data the physically based fatigue life calculation “Phybal” was developed at the Institute of Materials Science and Engineering at the University of Kaiserslautern. This method requires only one load increase test and two constant amplitude tests for a fast and nevertheless precise calculation of S-N (Woehler) curves, leading to a significant reduction in experimental time and costs.