On the strength prediction of adhesively bonded FRP-steel joints using cohesive zone modelling

•Cohesive zone modelling is used to predict the strength of FRP-steel joints with various failure modes.•Shape of cohesive law is found to have negligible effect on strength of joints with long overlaps.•The strength of joints with varying overlap length are correlated with the length of damage proc...

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Vydáno v:Theoretical and applied fracture mechanics Ročník 93; s. 64 - 78
Hlavní autoři: Heshmati, Mohsen, Haghani, Reza, Al-Emrani, Mohammad, André, Alann
Médium: Journal Article
Jazyk:angličtina
Vydáno: Amsterdam Elsevier Ltd 01.02.2018
Elsevier BV
Témata:
Adhesion
Adhesion tests
Adhesive joints
Application environment
Bonded joints
Bonding strength
Civil engineering structures
Cohesion
Cohesive zone modelling
Composite materials
Composites
Construction industry
Crack growth
Crack propagation
Cracks
Energy consumption
Energy-based methods
Failure
Failure modes
Fiber reinforced materials
Fiber reinforced plastics
Fiber reinforced polymers
Fibre reinforced materials
Fibre reinforced polymers
Interface fracture
Interfaces (materials)
Interfacial debonding
Joint strength
Mathematical models
Parameters
Predictions
Quality assurance
Quality assurance protocols
Reinforcement
Shape effects
Steel
Steel fibers
Civil engineering structures
Cohesive zone modelling
Composites
Fibre reinforced materials
Crack growth
Interface fracture
ISSN:0167-8442, 1872-7638, 1872-7638
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Shrnutí:•Cohesive zone modelling is used to predict the strength of FRP-steel joints with various failure modes.•Shape of cohesive law is found to have negligible effect on strength of joints with long overlaps.•The strength of joints with varying overlap length are correlated with the length of damage process zone.•Application of directly measured cohesive laws to FRP/steel double-lap shear joint.•The performance of strengthened steel beams with interfacial failure is accurately predicted. The variety of failure modes that are likely to occur in fibre-reinforced polymer (FRP)/steel joints used in the construction industry adds to the complexity associated with the design of these joints. This variation in possible failure modes is mainly attributed to the lack of a controlled application environment and to rather insufficient quality assurance protocols and procedures. The use of energy-based methods such as, cohesive zone modelling (CZM), can be a solution to circumvent such complexities. This paper investigates a number of issues related to CZM analyses of FRP/steel adhesive joints using various test configurations and a comprehensive numerical study. Parameters such as the effect of shape and type of cohesive law, crack path location, length of damage process zone, variations of adhesive and FRP properties, and different failure modes including cohesive, interfacial debonding and FRP failure on the strength of joints are investigated. The results show that the behaviour of the tested joints is accurately predicted provided that the variation of failure modes are taken into account. Moreover, it is shown that the damage process zone in adhesive layer is directly proportional to the shape of cohesive laws. This feature can be employed in the design phase to ensure sufficient overlap length and to account for important in-service parameters such as temperature and moisture.
Bibliografie:ObjectType-Article-1
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content type line 14
ISSN:0167-8442
1872-7638
1872-7638
DOI:10.1016/j.tafmec.2017.06.022