scholarly journals An investigation of in-plane dynamic behavior of adhesively-bonded composite joints under dynamic compression at high strain rate

2018 ◽  
Vol 191 ◽  
pp. 168-179 ◽  
Author(s):  
Sonia Sassi ◽  
Mostapha Tarfaoui ◽  
Hamza Ben Yahia
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Dynamic Behavior ◽  
High Strain ◽  
Dynamic Compression ◽  
Composite Joints ◽  
Adhesively Bonded ◽  
Bonded Composite

High-strain-rate fracture of adhesively bonded composite joints in DCB and TDCB specimens

2012 ◽  
Vol 13 (7) ◽  
pp. 1127-1131 ◽  
Author(s):  
J. U. Cho ◽  
A. Kinloch ◽  
B. Blackman ◽  
F. S. Rodriguez Sanchez ◽  
M. S. Han
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Composite Joints ◽  
Adhesively Bonded ◽  
Bonded Composite

Thermomechanical behavior of adhesively bonded joints under out-of-plane dynamic compression loading at high strain rate

2018 ◽  
Vol 52 (30) ◽  
pp. 4171-4184 ◽  
Author(s):  
Sonia Sassi ◽  
M Tarfaoui ◽  
Hamza B Yahia
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Heat Dissipation ◽  
High Strain ◽  
Dynamic Compression ◽  
Bonded Joints ◽  
Loading Conditions ◽  
Adhesively Bonded ◽  
Adhesively Bonded Joints ◽  
Out Of Plane

In this study, a new experimental approach in which the deformation, the damage kinetic, and the temperature are measured simultaneously during a high strain rate on adhesively bonded composite joints. Especially, our goal is to quantify the amount heat dissipation during impact and to identify the mechanisms that induce this dissipation. Out of plane dynamic compression tests were conducted on assembled specimens over a range of strain rate from 372 s−1 to 1030 s−1 using the Split hopkinson Pressure Bars technique. The specimen surface temperatures were monitored using an infrared camera. The increase in the strain rate has a dramatic effect on the stress–strain behavior producing a significant heat dissipation in the material. The infrared monitoring provides the spatial distribution of temperature that increase near the adhesive/adherent interfaces of the specimen. The observed temperature increase profiles clearly show that the stress concentration appears in the adhesive area and provide valuable information regarding the damage mechanisms and their role in the heat dissipation during dynamic loading conditions. The dependence of these results on strain rate indicates that there exists a correlation between the thermo-mechanical behavior and the strain rate effect, which might be useful when developping damage models taking into account the energy balance for adhesively bonded joints under impact loading conditions.

Experimental study of the out-of-plane dynamic behaviour of adhesively bonded composite joints using split Hopkinson pressure bars

2018 ◽  
Vol 52 (21) ◽  
pp. 2875-2885 ◽  
Author(s):  
S Sassi ◽  
M Tarfaoui ◽  
H Benyahia
Keyword(s):  
Strain Rate ◽  
Dynamic Behaviour ◽  
Dynamic Compression ◽  
Strain Rates ◽  
Bonded Joints ◽  
Adhesively Bonded ◽  
Adhesively Bonded Joints ◽  
Out Of Plane ◽  
Bonded Composite ◽  
Strong Material

The effect of the strain rate on the mechanical behavior and the damage of adhesively bonded joints is one of the most important factors to consider in designing them. Vast research has been carried out on the dynamic behaviour of adhesives at different strain rates; however, the investigation about the dynamic behaviour of the adhesively bonded joints is limited. In this paper, the main objective is to study and assess the effect of the strain rate on the out-of-plane mechanical behaviour of adhesively bonded joints under dynamic compression using Hopkinson bars. These joints are studied using glass/vinylester composite materials which are commonly used in naval applications. The experimantal results have shown a strong material sensitivity to strain rates. Moreover, damage investigations have revealed that the failure mainly occurred in the adhesive/adherent interface because of the brittle nature of the polymeric adhesive. Results have shown good agreement with the dependency of the dynamic parameters on strain rates.

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