Single and periodic overloading effects on the mode I fatigue crack growth of a ductile adhesive

被引：6
|
作者：
Sousa, F. Castro [1 ]
Akhavan-Safar, A. [2 ]
da Silva, L. F. M. [1 ]
机构：
[1] Univ Porto, Dept Mech Engn, Fac Engn, Rua Dr Roberto Frias, P-4200465 Porto, Portugal
[2] Inst Sci & Innovat Mech & Ind Engn INEGI, Rua Dr Roberto Frias, P-4200465 Porto, Portugal
来源：
THEORETICAL AND APPLIED FRACTURE MECHANICS | 2022年 / 121卷
关键词：
Adhesive joints; Fatigue; Overload; Paris law; Ductile adhesive; VARIABLE AMPLITUDE FATIGUE; BONDED JOINTS; FRACTURE; ACCELERATION; CONSTANT; CLOSURE;
D O I：
10.1016/j.tafmec.2022.103528
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Variable amplitude fatigue loading, where overloading is included, is commonly experienced by bonded structures. Thus, this work aims the assessment of the influence of overloads on the total fatigue life and fatigue crack growth (FCG) of a ductile adhesive. Double cantilever beam (DCB) specimens were subjected to different fatigue loading spectra including constant amplitude, single and periodic overloads. Stiffness degradation and its rate variation were also evaluated. Results showed that overloads can have a fatigue retarding effect leading to an increase in fatigue life up to 4 times. However, for periodic overloads, this increase in fatigue life was less pronounced.
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收藏
页数：13
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