Fatigue life estimations of alclad AA2024-T3 friction stir clinch joints

被引：27
|
作者：
Lin, P. -C. [1 ,2 ]
Lo, S. -M. [2 ]
Wu, S. -P. [2 ]
机构：
[1] Natl Chung Cheng Univ, Adv Inst Mfg High Tech Innovat, Chiayi 62102, Taiwan
[2] Natl Chung Cheng Univ, Dept Mech Engn, Chiayi 62102, Taiwan
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2018年 / 107卷
关键词：
Friction stir clinching; Friction stir spot welding; Fatigue; Aided; Aluminum alloy 2024-T3; LAP-SHEAR SPECIMENS; INTENSITY FACTOR SOLUTIONS; CROSS-TENSION SPECIMENS; FORM STRUCTURAL STRESS; SPOT WELDS; ALUMINUM-ALLOY; FAILURE MODES; GEOMETRIC FUNCTIONS; LOADING CONDITIONS; SHEETS;
D O I：
10.1016/j.ijfatigue.2017.10.011
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Joining aided AA2024-T3 sheets is difficult for conventional welding processes due to ductile surface cladding layers. Friction stir clinching (FSC) was therefore proposed to overcome this problem. Here, two types of specimens, tensile-shear and cross-tension, were made to investigate general fatigue behavior of FSC joints. Critical fatigue cracks and failure modes were identified by photos and micrographs. Interfacial and kinked crack fatigue models consist of local and global stress intensity factors (SIFs) and a Paris law approach were taken for fatigue life estimations. The fatigue life estimations well agreed with the experimental fatigue data. The fatigue data of FSC joints in above specimens were well correlated by effective SIF ranges.
引用
收藏
页码：13 / 26
页数：14
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