NDLI: Mode I fracture of adhesive joints using tailored cohesive zone models

Content Provider	Springer Nature Link
Author	Alfa, M. Furgiuele, F. Leonardi, A. Maletta, C. Pauli, G. H.
Copyright Year	2008
Abstract	Cohesive zone models are explored in order to study cleavage fracture in adhesive bonded joints. A mode I cohesive model is defined which correlates the tensile traction and the displacement jump (crack faces opening) along the fracture process zone. In order to determine the traction-separation relation, the main fracture parameters, namely the cohesive strength and the fracture energy, as well as its shape, must be specified. However, owing to the difficulties associated to the direct measurement of the fracture parameters, very often they are obtained by comparing a measured fracture property with numerical predictions based on an idealized traction separation relation. Likewise in this paper the cohesive strength of an adhesive layer sandwiched between elastic substrates is adjusted to achieve a match between simulations and experiments. To this aim, the fracture energy and the load-displacement curve are adopted as input in the simulations. In order to assess whether or not the shape of the cohesive model may have an influence on the results, three representative cohesive zone models have been investigated, i.e. exponential, bilinear and trapezoidal. A good agreement between experiments and simulations has been generally observed. However, a slight difference in predicting the loads for damage onset has been found using the different cohesive models.
Starting Page	193
Ending Page	204
Page Count	12
File Format	PDF
ISSN	03769429
Journal	International Journal of Fracture
Volume Number	157
Issue Number	1-2
e-ISSN	15732673
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-12-16
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Adhesives Cohesive zone model Cohesive zone model shape Fracture energy Mechanical Engineering Automotive Engineering Civil Engineering Mechanics Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Computational Mechanics Modeling and Simulation

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