scholarly journals In-Situ Observation in Adhesive Layer of Adhesively Bonded Butt Joints with a Thin Adherend under Cyclic Loading.

2000 ◽  
Vol 49 (5) ◽  
pp. 561-566
Author(s):  
Makoto IMANAKA ◽  
Koichi HIDAKA ◽  
Takafumi TURUI ◽  
Yojirou AKIZUKI ◽  
Akira MATAYOSHI
Keyword(s):  
Cyclic Loading ◽  
Adhesive Layer ◽  
In Situ Observation ◽  
Adhesively Bonded ◽  
Butt Joints

Effect of Adhesive Thickness on the Impact Toughness of Butt-Joints

2011 ◽  
Vol 230-232 ◽  
pp. 1350-1354 ◽  
Author(s):  
Min You ◽  
Jing Rong Hu ◽  
Xiao Ling Zheng ◽  
Ai Ping He ◽  
Cun Jun Chen
Keyword(s):  
Impact Toughness ◽  
Adhesive Layer ◽  
Curing Temperature ◽  
Curing Time ◽  
Optimum Thickness ◽  
Adhesively Bonded ◽  
Butt Joints ◽  
Notched Specimen ◽  
Adhesive Thickness ◽  
The Impact

The effect of the adhesive thickness on the impact toughness of the adhesively bonded steel joint under impact loading is studied using the experimental method. The results obtained show that the impact toughness increases when the adhesive thickness increased then it decrease as the adhesive thickness increase. When the curing time is set as a constant, the higher the curing temperature is, the lower the impact toughness of the joint. The optimum thickness of the adhesive layer for the specimen of impact toughness test cured at 60 C for 1 h is 0.6 mm and it is 0.4 mm to 0.6 mm for the specimen cured 1 h at temperature of 90 C or higher than it. It is recommended using the notched specimen to decrease the testing deviation.

In-situ observation of microscopic damage in adhesively bonded CFRP joints under mode I and mode II loading

2019 ◽  
Vol 227 ◽  
pp. 111330 ◽  
Author(s):  
Sota Oshima ◽  
Akinori Yoshimura ◽  
Yoshiyasu Hirano ◽  
Toshio Ogasawara ◽  
Kwek-Tze Tan
Keyword(s):  
Mode I ◽  
Mode Ii ◽  
In Situ Observation ◽  
Adhesively Bonded ◽  
Microscopic Damage ◽  
Mode Ii Loading

Stress States and Interference in Double Adhesive Layer Scarf and Butt Joints

2002 ◽  
Author(s):  
Samar Teli ◽  
Erol Sancaktar
Keyword(s):  
Finite Element ◽  
Adhesive Layer ◽  
Load Ratio ◽  
Peak Stress ◽  
Interfacial Stress ◽  
Adhesively Bonded ◽  
Butt Joints ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Stress States

The stress interference effects adhesively bonded scarf and butt joints were investigated when an additional adhesive layer was incorporated in overall joint design. Finite element models were developed and analyzed to compare interfacial stress states and peak stresses on the double adhesive layer joints with those on the single adhesive layer joints with respect to the scarf angle, adhesive layer separation (ALS) and adhesive modulus. This comparison was done in terms of stress ratio calculated as a ratio of interfacial peak stress on double adhesive layer joint to that an single adhesive layer joint. The tensile task results were correlated with the finite element analysis (FEA) results in terms of load ratio calculated as a ratio of failure load on single adhesive layer joint to that on double adhesive layer joint. Six scarf angles (15°, 30°, 45°, 60°, 75° and 90°), three ALS and adhesives were analyzed for this study.

Fatigue Life Estimation of Adhesively Bonded Lap Joints

1988 ◽  
Vol 110 (4) ◽  
pp. 350-354 ◽  
Author(s):  
Makato Imanaka ◽  
Yusuke Fukuchi ◽  
Waichiro Kishimoto ◽  
Kozo Okita ◽  
Hideaki Nakayama ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Fatigue Strength ◽  
Load Condition ◽  
Tensile Load ◽  
Adhesive Layer ◽  
Maximum Tensile Stress ◽  
Lap Joints ◽  
Thin Wall ◽  
Adhesively Bonded ◽  
Butt Joints

This paper describes a method of estimating the fatigue life of adhesively bonded lap joints on the basis of the stress analysis in adhesive layer with finite element method. First, cyclic tensile fatigue tests were conducted for adhesively bonded lap joints with different lap length and adhesive layer thickness. The results were evaluated from the viewpoint of the maximum values of both tensile and shear stress obtained numerically, instead of the apparent stress. Then these standardized fatigue strength were compared with those of adhesively bonded butt joints of a thin wall tube under cyclic tensile and fully reversed torsional load conditions. The results indicate that fatigue strength of lap joints evaluated from the maximum tensile stress of the adhesive layer agrees well with the fatigue strength of adhesively bonded butt joints of thin wall tube under cyclic tensile load condition. It is confirmed that fatigue strength of lap joints can be estimated adequately based on the fatigue strength of the butt joint of thin wall tube and the numerical results for the stress state of adhesive layer.

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