Prediction of interfacial fracture between concrete and fiber reinforced polymer (FRP) by using cohesive zone modeling

2015 ◽  
Vol 63 ◽  
pp. 122-131 ◽  
Author(s):  
Kyoungsoo Park ◽  
Kyungsu Ha ◽  
Habeun Choi ◽  
Changjoon Lee
Keyword(s):  
Cohesive Zone ◽  
Interfacial Fracture ◽  
Fiber Reinforced Polymer ◽  
Cohesive Zone Modeling ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Zone Modeling

Material and adhesive effect in adhesively-bonded composite stepped-lap joints

2020 ◽  
Vol 234 (13) ◽  
pp. 1967-1979
Author(s):  
RFN Brito ◽  
RDSG Campilho ◽  
RDF Moreira ◽  
IJ Sánchez-Arce
Keyword(s):  
Carbon Fiber ◽  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Lap Joints ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Zone Model ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

Adhesive bonding is a predominant bonding technique in the aeronautical and automotive industries. Cohesive zone models, used together with the finite element method, are a viable tool to predict the strength of adhesive joints. The main objective of this study is to evaluate experimentally and numerically (by cohesive zone model) the mechanical performance of carbon-fiber reinforced polymer stepped-lap bonded joints submitted to tensile loads, for different overlap lengths ( LO) and adhesives. The failure mode analysis showed a predominant failure type for all adhesives and good correspondence with the numerical predictions. Normalized peel ( σy) and shear ( τxy) stresses in the adhesive highly increased with LO, which then reflected on different maximum load ( Pm) evolution with LO, depending on the adhesive's ductility. The damage variable SDEG (stiffness degradation) was also evaluated and emphasized on the smaller damage zone at Pm for the brittle adhesive. A significant geometry and material effect were found on Pm of the stepped-lap joints, with benefit for large LO. In this regard, cohesive zone model revealed to be a suitable tool in determining the behavior of different joints. Comparison with joints with aluminum showed that, provided that no carbon-fiber reinforced polymer delamination occurs, stepped-lap joints between carbon-fiber reinforced polymer adherends give better results due to the higher composite stiffness.

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