Evaluating size effects on fatigue life of 42CrMo4+QT steel using a statistical S-N model with highly-stressed volume and surface

被引：3

作者：

Marques, J. M. E. ^{[1
]}

Mzourek, M. ^{[1
]}

Papuga, J. ^{[1
]}

Ruzicka, M. ^{[1
]}

Mara, V. ^{[2
]}

Trojan, K. ^{[2
]}

Benasciutti, D. ^{[3
]}

机构：

[1] Czech Tech Univ, FME, Tech 4, Prague 6, Czech Republic

[2] Czech Tech Univ, FNSPE, Trojanova 13, Prague 2, Czech Republic

[3] Univ Ferrara, Dept Engn, Via Saragat 1, I-44122 Ferrara, Italy

来源：

23 EUROPEAN CONFERENCE ON FRACTURE, ECF23 | 2022年 / 42卷

关键词：

size effects; fatigue; S-N curve; highly-stressed volume; highly-stressed surface;

D O I：

10.1016/j.prostr.2022.12.180

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A statistical S-N model based on the highly-stressed volume/surface concept is proposed for evaluating the size effects on fatigue strength of specimens from 42CrMo4+QT steel. The proposed model extends an existing physically valid model (Castillo et al. 2009) and allows the S-N curve to be extrapolated from small-scale to full-scale components. The model is validated against experimental fatigue data obtained by testing solid and hollow smooth cylindrical specimens under push-pull constant amplitude loadings. After checking that the proposed model agrees with experimental fatigue data, it is possible to apply the model to estimate the S-N curve of specimens of the highly-stressed volume up to 1802 mm(3). For this case, an S-N expression is provided that can directly be used in fatigue analysis without the necessity of running a non-linear optimization. (c) 2022 The Authors. Published by Elsevier B.V.

引用

页码：1414 / 1421

页数：8