bond-slip analysis via a cohesive-zone model simulating damage, friction and interlocking
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2014
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Abstract
A recently proposed cohesive-zone model which effectively combines damage, friction and
mechanical 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 in
good agreement with experimental measurements of the bond slip characteristics in the post-yield range of
deformed bars reported in the literature. This study highlights the main features of the model: with physically
justified and relatively simple arguments, and within the sound framework of thermodynamics with internal
variables, 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 the
proposed approach allows easier and physically clearer procedures for the determination of the model
parameters of such three elementary mechanical behaviours, and makes possible their interpretation and
measurement as separate material property, as a viable alternative to lumping these parameters into single values
of the fracture energy. In particular, the proposed approach allows to consider a single value of the adhesion
energy for modes I and II.
| Reference Key |
serpieri2014fratturabond-slip
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|---|---|
| Authors | ;R. Serpieri;L. Varricchio;E. Sacco;G. Alfano |
| Journal | applied catalysis |
| Year | 2014 |
| DOI |
10.3221/IGF-ESIS.29.24
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| URL | |
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