Fatigue life evaluation of metallic structures under multiaxial random loading

被引：43
作者：
Carpinteri, Andrea [1 ]
Fortese, Giovanni [1 ]
Ronchei, Camilla [1 ]
Scorza, Daniela [1 ]
Spagnoli, Andrea [1 ]
Vantadori, Sabrina [1 ]
机构：
[1] Univ Parma, Dept Civil Environm Engn & Architecture, Parco Area Sci 181-A, I-43124 Parma, Italy
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2016年 / 90卷
关键词：
Critical plane approach; Fatigue life evaluation; Frequency domain; Multiaxial random loading; Time domain; VARIABLE-AMPLITUDE; SPECTRAL METHODS; FREQUENCY-DOMAIN; PREDICTION; CONSTANT; STRESS;
D O I：
10.1016/j.ijfatigue.2016.05.007
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A frequency-domain critical-plane criterion is reformulated in order to improve its accuracy in terms of fatigue life estimation for smooth metallic structural components under multiaxial random loading. The criterion here proposed consists of three steps: (i) definition of the critical plane; (ii) Power Spectral Density (PSD) evaluation of an equivalent normal stress; (iii) estimation of fatigue life by implementing damage models different from that used in the original formulation. Such a reformulated criterion is numerically validated by employing experimental fatigue results for 18G2A and 10 HNAP structural steels, subjected to random combined bending and torsion. Further, the above theoretical results are also compared with those determined through a time-domain criterion proposed in the past by some of the present authors. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：191 / 199
页数：9
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