A simple energy-based model for nonproportional low-cycle multiaxial fatigue life prediction under constant-amplitude loading

被引：33
|
作者：
Lu, Y. [1 ]
Wu, H. [1 ]
Zhong, Z. [1 ,2 ]
机构：
[1] Tongji Univ, Sch Aerosp Engn & Appl Mech, Shanghai 200092, Peoples R China
[2] Harbin Inst Technol, Sch Sci, Shenzhen 518055, Peoples R China
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2018年 / 41卷 / 06期
基金：
中国国家自然科学基金;
关键词：
effective energy parameter; energy-based model; life prediction; multiaxial fatigue; nonproportional factor; STRAIN HISTORIES; TENSOR PATHS; STRESS; CRITERION; PARAMETER; STEEL;
D O I：
10.1111/ffe.12785
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
From the literature concerning the traditional nonproportional (NP) multiaxial cyclic fatigue prediction, special attentions are usually paid to multiaxial constitutive relations to quantify fatigue damage accumulation. As a result, estimation of NP hardening effect decided by the entire history path is always proposed, which is a challenging and complex task. To simplify the procedure of multiaxial fatigue life prediction of engineering components, in this paper, a novel effective energy parameter based on simple material properties is proposed. The parameter combines uniaxial cyclic plastic work and NP hardening effects. The fatigue life has been assessed based on traditional multiaxial fatigue criterion and the proposed parameter, which has been validated by experimental results of 316L stainless steel under different low-cycle loading paths.
引用
收藏
页码：1402 / 1411
页数：10
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