The fatigue life prediction for structure with surface scratch considering cutting residual stress, initial plasticity damage and fatigue damage

被引：36
|
作者：
Zhan Zhixin [1 ]
Hu Weiping [1 ]
Zhang Miao [2 ]
Meng Qingchun [1 ]
机构：
[1] Beihang Univ, Sch Aeronaut Sci & Engn, Inst Solid Mech, Beijing 100191, Peoples R China
[2] China Acad Space Technol, Inst Manned Space Syst Engn, Beijing 100094, Peoples R China
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2015年 / 74卷
关键词：
Damage mechanics; Residual stress; Scratch defect; Plasticity damage; Fatigue; MULTIAXIAL FATIGUE; MECHANICS;
D O I：
10.1016/j.ijfatigue.2015.01.011
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
In this paper, a continuum damage mechanics based fatigue model is used to evaluate the effect of surface scratches resulting from accidental scrapes on the fatigue life of structures. First, a dynamic analysis is conducted to simulate scratch generation. Second, the initial damage field caused by plastic deformation in the scraping process is calculated. Third, for structures with scratches under fatigue loading, Chaudonneret's damage model for multiaxial fatigue is applied and the finite element implementation is presented. At last, this method is applied to life calculation for scratched specimens and for a scratched fixed plate. The theoretical calculation tallies with the experimental results. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：173 / 182
页数：10
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