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Elastoplastic damaging model for adhesive anchor systems. I: Theoretical formulation and numerical implementation

TitleElastoplastic damaging model for adhesive anchor systems. I: Theoretical formulation and numerical implementation
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2012
AuthorsSpada, A., Giambanco G., and Rizzo P.
JournalJournal of Engineering Mechanics
Volume137
Pagination854-861
ISSN07339399
Keywordsacoustic emission, Acoustic emission testing, Acoustic emissions, Acoustic-emission techniques, Adhesion, Analytical model, brittle deformation, Brittleness, Chemically bonded, Computer simulation, Damage, ductile deformation, Elasto-plastic, Elastoplasticity, FEAP, Finite Element, Finite element method, Finite-element codes, Flow rules, Forecasting, Fracture, Free energy, Hardening, Helmholtz equation, interface, Interfaces (materials), Isotropic damage, Mathematical models, Mechanical response, Models, New model, Numerical implementation, Postinstalled, Pull-out force, Pull-out test, pullout test, Quasibrittle material, Structural behaviors, Structural response, Theoretical formulation, Theoretical prediction
Abstract

In this and in the companion paper, the mechanical response of adhesive anchor systems is theoretically and numerically predicted and experimentally observed. The theoretical prediction is on the basis of an elastoplastic damaging model formulated to predict the structural response associated with the development of a fracture in adhesive anchor systems. This part describes the analytical model developed in the framework of a thermodynamically consistent theory, which assumes adhesion where the structure is sound, and friction in correspondence with the fracture. Isotropic damage is considered. The model can predict the structural behavior at the interface between two surfaces of ductile, brittle, or quasi-brittle materials. The Helmholtz free energy is written to model the materials' hardening or softening. Isotropic damage is considered, and the possible effects of dilatancy are taken into account, including nonassociative flow rules. The formulation is implemented into the finite-element code FEAP. In the companion paper, the new model is adopted to predict the mechanical response to the pullout force of postinstalled rebar chemically bonded in concrete. The analytical model and the numerical implementation are experimentally validated by several pullout tests, which are monitored by using an acoustic-emission technique. © 2011 American Society of Civil Engineers.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84855914362&doi=10.1061%2f%28ASCE%29EM.1943-7889.0000287&partnerID=40&md5=73da81d178d7f9b90c1320bd819c98f9
DOI10.1061/(ASCE)EM.1943-7889.0000287
Citation KeySpada2012854