Fatigue initiation in adhesively-bonded single-lap joints

被引:24
作者
Solana, A. Graner [1 ]
Crocombe, A. D.
Wahab, M. M. Abdel
Ashcroft, I. A.
机构
[1] Univ Surrey, Sch Engn, Surrey GU2 7XH, England
[2] Univ Loughborough, Wolfson Sch Mech & Mfg Engn, Loughborough LE11 3TU, Leics, England
关键词
fatigue damage; backface strain; single-lap joints; damage maps; aluminium; FdM73;
D O I
10.1163/156856107782313629
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
This paper presents detailed experimental fatigue data obtained from a selection of joints tested under cyclic loads. Some were tested to failure to determine fatigue load-life data. The other specimens were tested to induce different levels of damage. Multiple strain gauges (SGs) were used to record the change in backface strain during the testing, allowing measurement of damage in different locations. The overlap region was then sectioned and polished so it could be inspected using microscopy. The experimental results showed that damage first appeared in the fillet, appearing as a change in adhesive colour in a specific area. Cracks were observed in one specimen, which was tested for a higher number of cycles. A damage scale based on area affected, change in colour and size of cracks is proposed to classify the damaged sections. A result of this work is to tie the backface strain readings with the damage scale allowing damage to be assessed in a non-destructive manner.
引用
收藏
页码:1343 / 1357
页数:15
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