Giga-fatigue life prediction of FV520B-I with surface roughness

被引：46

作者：

Wang, Jinlong ^{[1
]}

Zhang, Yuanliang ^{[1
]}

Sun, Qingchao ^{[1
]}

Liu, Shujie ^{[1
]}

Shi, Bowen ^{[1
]}

Lu, Huitian ^{[2
]}

机构：

[1] Dalian Univ Technol, Dalian 116023, Peoples R China

[2] S Dakota State Univ, Brookings, SD 57007 USA

来源：

MATERIALS & DESIGN | 2016年 / 89卷

关键词：

Martensitic stainless steel; FV520B-I; Surface roughness; Fatigue life prediction; Giga-cycle fatigue; CRACK INITIATION; GIGACYCLE FATIGUE; CYCLE FATIGUE; STRENGTH; STRESS; MECHANISM; STEEL; MODEL;

D O I：

10.1016/j.matdes.2015.10.104

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Surface roughness has proven to be an important factor on the fatigue life of FV520B-I. However few laboratory experiments on fatigue properties with the consideration of surface roughness are reported in literature. In this paper, giga-cycle fatigue experiment was conducted to obtain fatigue data and the mechanism of fracture development for FV520B-I. With a comprehensive use of energy theory, fracture developing mechanics and the impact of stress ratio, a life prediction model for FV520B-I with the synthesis of surface roughness information is established. Using the fatigue data, including life time and inclusion size, an FV520B-I empirical fatigue life prediction model is identified by both model fitting and model parameters estimation. This model of giga-cycle fatigue of FV520-I is novel to the study of FV520B-I because of the surface roughness considered comprehensively in modeling. This result will also highly enhance the research development in remanufacturing engineering. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：1028 / 1034

页数：7

共 34 条

[1] Effects of surface quality and loading history on fatigue life of laser-machined poly(methyl methacrylate) [J].