Energy-based method of fatigue damage cumulation

被引：39
|
作者：
Mrozinski, Stanislaw [1 ]
机构：
[1] Univ Sci & Technol, Fac Mech Engn, Bydgoszcz, Poland
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2019年 / 121卷
关键词：
Low-cycle fatigue; Strain; Stress; Plastic strain energy; Hysteresis; Palmgren-Miner hypothesis; Fatigue calculations; Cyclic softening; Cyclic hardening; STRAIN-ENERGY; CAST; STEEL; LIFE;
D O I：
10.1016/j.ijfatigue.2018.12.008
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The study presents the results of low-cycle fatigue tests on AW-2024 aluminium alloy specimens under constant amplitude and multistage loading conditions. As expected, significant hardening of the material was observed in both cases. The tests confirmed that cyclic properties of AW-2024 alloy under multistage loading conditions can be represented based on the results of tests under constant amplitude conditions for the same alloy. The basis for a new fatigue damage cumulation method was formulated based on a comparative analysis of the test results. The main feature of the proposed method consists in including into the analysis the cyclic hardening of AW-2024 alloy during fatigue life calculation. An experimental verification of the method proved its practical applicability. A comparative analysis of the results for a standard Palmgren-Miner hypothesis and the new approach demonstrated the advantages of using the new method.
引用
收藏
页码：73 / 83
页数：11
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