FE analysis of the flexural behavior of cementitious composites using the Concrete Damage Plasticity model

In this study, the structural and fracture behavior of cementitious composite beams subjected to flexural loads is experimentally and numerically investigated. Six series of mortar specimens reinforced with steel mesh layer ware cast and tested in 4–point bending. Configurations with 2, 4 or 6 mesh layers were examined to characterize the flexural response of materials. A 3D FE model was developed in ABAQUS to predict the nonlinear behavior of the beams and to simulate the evolution of fracture patterns under an increasing load. The nonlinear cracking and crushing response of the mortar was implemented by using the Concrete Damage Plasticity model. For the steel reinforcement, an elasto-plastic model with isotropic hardening was adopted. The results of the numerical analysis are discussed. Comparisons between numerical and experimental results highlight a reasonably good agreement both in term of structural response and of damage growth. / In questo studio, sono riportati i risultati di un’analisi numerica e sperimentale sul comportamento flessionale di travi in composito cementizio. Sei serie di provini costituiti da una matrice cementizia rinforzata con reti di acciaio sono stati realizzati e sottoposti a prova di flessione su quattro punti. Configurazioni strutturali con 2, 4 e 6 strati di reti di rinforzo sono state realizzate e modellate numericamente. Per simulare il comportamento del materiale e l’evoluzione dei pattern di frattura, è stato sviluppato un modello FEM tridimensionale in ambiente ABAQUS. La risposta fortemente non lineare della malta è implementata per mezzo del “Concrete Damaged Plasticity model”, mentre un modello elasto-plastico con incrudimento isotropo è stato adottato per gli elementi di rinforzo. Il confronto tra risultati numerici e sperimentali evidenzia un buon livello di accordo, sia in termini di comportamento strutturale che di sviluppo ed evoluzione del danneggiamento

An Irreversible Constitutive Law for Modeling the Delamination Process Using Interface Elements

An irreversible constitutive law is postulated for the formulation of..

Technological aspects of manufacturing and numerical modelling of clinch-adhesive joints

This short book describes the basic technological aspects involved in the creation of purely clinch and clinch-adhesive joints made of different types of adherent materials and employing different joining technologies. Basic parameters that need to be taken into account in the design process are also presented, while a comparison of experimental testing of the hybrid joint with simple clinching for a combination of different joining materials underlines the advantages of opting for hybrid joints. The book’s conclusions will facilitate the practical application of this new fastening technology