A Study of Fatigue Property for FV520B-I at Different Loading Frequencies

2017 4th International Conference on Advanced Materials, Mechanics and Structural Engineering

材料科学;机械制造

Zhao, Q.C.^1 ; Zhang, Y.L.^1 ; Wang, J.L.^1 ; Shen, Y.H.^1 ; Liu, S.J.^1

School of Mechanical Engineering, Dalian University of Technology, Dalian, China^1

关键词: Conversion coefficients;    Fatigue properties;    Fitting algorithms;    High frequency HF;    Loading frequencies;    Low frequency testing;    Three-parameter models;    Ultrasonic experiments;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/269/1/012018/pdf
DOI  :  10.1088/1757-899X/269/1/012018

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Fatigue property of FV520B-I can be affected by the changing of the loading frequency. However, few theories about fatigue property for metal at different loading frequencies has ever been proposed. Experimental data are obtained from the conducted traditional experiment (140 Hz) and ultrasonic experiment (20 kHz). Fatigue property of high strength steel FV520B-I obtained by ultrasonic high-frequency fatigue testing method is higher than that by traditional low frequency testing. FV520B-I fatigue strength conversion model are established with comprehensive use of a fitting algorithm based on the combination of experimental data and classic three-parameter-model. The fatigue strength conversion coefficient C0for FV520B-I is proposed. A clear understand of the effect of loading frequency on the fatigue property of FV520B-I is novel and has an important significance in guaranteeing the accuracy of the actual fatigue analysis of FV520B-I.