文献类型：期刊文献

英文题名：Stress-dependent electrical resistance model for fatigue lifetime calculation of 48MnV steel

作者：Sun, Binxiang[1]; Yang, Qiuwei[1]; Yang, Lijun[1]; Liu, Qi[1]

机构：[1] Department of Civil Engineering, Shaoxing University, China

年份：2012

卷号：4

期号：23

起止页码：617

外文期刊名：International Journal of Advancements in Computing Technology

收录：EI(收录号：20130215888050)、Scopus(收录号：2-s2.0-84871892349)

语种：英文

外文关键词：Bending tests - Binary alloys - Electric resistance - Fatigue damage - Fatigue testing - Manganese alloys - Nondestructive examination - Road construction - Steel research - Stress analysis - Vanadium steel

外文摘要：The DC electrical resistance model is more sensitive to the initiation of micro cracks during fatigue and a good nondestructive measuring technique. However, the previous electrical resistance model for high-cycle fatigue damage accumulation is independent of the change of cyclic stress amplitudes. This paper proposed a cyclic stress amplitude-dependent electrical resistance model for high-cycle fatigue lifetime prediction of 48MnV steel. The high-cycle fatigue tests of small-smooth cylindrical 48MnV steel specimens performed by a rotating bending fatigue-testing machine with stress controlling and fully reversed loading condition were employed to verify the proposed model. The measured results indicate that the electrical resistance ratio of a specimen between the fatigued and initial states is an exponential expression of the fatigue cyclic fraction. The material parameter α depending on various cyclic stress amplitudes is always negative and monotonic increase with increasing of cyclic stress amplitude. Good agreement between the experimental and calculated values of fatigue damage is obtained.