Thermal-mechanical-equivalent fatigue load method for mechanically fastened Hybrid-material structures

被引：8
作者：
Cao, Jing [1 ]
Lin, Hanyu [1 ]
Liu, Zuoting [1 ]
Yao, Weixing [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Aerosp Struct, 29 Yudao St, Nanjing 210016, Peoples R China
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2023年 / 176卷
基金：
中国国家自然科学基金;
关键词：
Thermal-mechanical load; Hybrid material; Mechanical fastening; Fatigue life; Structure verification; COMPOSITE; JOINTS; FAILURE; DESIGN; LAP;
D O I：
10.1016/j.ijfatigue.2023.107906
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
It is difficult to verify the fatigue performance of mechanically fastened hybrid-material structures under the complex environment-load spectrum. A thermal-mechanical-equivalent fatigue load method was proposed, so that the structure has the same fatigue damage distribution under the equivalent load and the original thermal-mechanical load. By considering the influence of environmental temperature on the structural fatigue performance and the dispersion of material fatigue property, the calculation model for the fatigue damage distribution of fastened structure was established. The equivalent load could be determined according to the designed tolerance value of distribution difference. The effectiveness of method was verified by 7050-T7451 aluminum alloy/CFRP laminate plate three-bolt single-lapped hybrid fastened specimens.
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页数：10
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