Bond-slip analysis via a cohesive-zone model simulating damage,friction and interlocking
Journal Title: Frattura ed Integrità Strutturale - Year 2014, Vol 8, Issue 29
Abstract
A recently proposed cohesive-zone model which effectively combines damage, friction andmechanical interlocking has been revisited and further validated by numerically simulating the pull-out test,from a concrete block, of a ribbed steel bar in the post-yield deformation range. The simulated response is ingood agreement with experimental measurements of the bond slip characteristics in the post-yield range ofdeformed bars reported in the literature. This study highlights the main features of the model: with physicallyjustified and relatively simple arguments, and within the sound framework of thermodynamics with internalvariables, the model effectively separates the three main sources of energy dissipation, i.e. loss of adhesion,friction along flat interfaces and mechanical interlocking. This study provides further evidence that theproposed approach allows easier and physically clearer procedures for the determination of the modelparameters of such three elementary mechanical behaviours, and makes possible their interpretation andmeasurement as separate material property, as a viable alternative to lumping these parameters into single valuesof the fracture energy. In particular, the proposed approach allows to consider a single value of the adhesionenergy for modes I and II.
Authors and Affiliations
R. Serpieri, L. Varricchio, E. Sacco, G. Alfano
Keywords
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- EP ID EP157818
- DOI 10.3221/IGF-ESIS.29.24
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