TY - JOUR AU - Serpier, R. AU - Varricchio, L. AU - Sacco, E. AU - Alfano, G. PY - 2014/07/09 Y2 - 2024/03/28 TI - Bond-slip analysis via a cohesive-zone model simulating damage, friction and interlocking JF - Frattura ed Integrità Strutturale JA - Fra&IntStrut VL - 8 IS - 29 SE - Miscellanea DO - 10.3221/IGF-ESIS.29.24 UR - https://www.fracturae.com/index.php/fis/article/view/1258 SP - pages 284-292 AB - <p>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<br>justified and relatively simple arguments, and within the sound framework of thermodynamics with internal<br>variables, the model effectively separates the three main sources of energy dissipation, i.e. loss of adhesion,<br>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<br>parameters of such three elementary mechanical behaviours, and makes possible their interpretation and<br>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.</p> ER -