Search results for "Cohesive element"

showing 3 items of 3 documents

Cohesive Model for the Simulation of Crack Initiation and Propagation in Mixed-Mode I/II in Composite Materials

2019

A cohesive element able to connect and simulate crack growth between independently modeled finite element subdomains with non-matching meshes is proposed and validated. The approach is based on penalty constraints and has several advantages over conventional FE techniques in disconnecting two regions of a model during crack growth. The most important is the ability to release portion of the interface that are smaller than the local finite element length. Thus, the growth of delamination is not limited to advancing by releasing nodes of the FE model, which is a limitation common to the methods found in the literature. Furthermore, it is possible to vary the penalty parameter within the cohes…

0301 basic medicineCommercial softwareCohesive elementMaterials science030102 biochemistry & molecular biologyInterface (computing)Delamination02 engineering and technologyFinite element . Cohesive element . Penalty method . Composite materials . Delamination . Mixed-mode propagation021001 nanoscience & nanotechnologyMixed modeFinite element method03 medical and health sciencesSettore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineCeramics and CompositesPenalty methodPolygon meshComposite material0210 nano-technology
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Modelling of the fracture toughness anisotropy in fiber reinforced concrete

2015

Steel fiber reinforced concrete is potentially very promising material with unique properties, which currently is widely used in some applications, such as floors and concrete pavements. However, lack of robust and reliable models of fiber reinforced concrete fracture limits its application as structural material. In this work a numerical model is proposed for predicting the crack growth in fiber reinforced concrete. The mixing of the steel fibers with the concrete usually creates nonuniform fibers distribution with more fibers oriented in horizontal direction, than in vertical. Simple numerical models of fiber reinforced concrete require a priori knowledge of the crack growth direction in …

Materials sciencelcsh:Mechanical engineering and machinerylcsh:TA630-695Fiber-reinforced concreteFiber reinforced concretelaw.inventionFracture toughnessCohesive elementslawmedicinelcsh:TJ1-1570FiberComposite materialStructural materialbusiness.industryMechanical EngineeringStiffnessFracture mechanicsStructural engineeringlcsh:Structural engineering (General)Cohesive zone modelFractureMechanics of MaterialsReinforced solidmedicine.symptombusinessFrattura ed Integrità Strutturale
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ELEMENTO D’INTERFACCIA PER LA SIMULAZIONE DI PROCESSI DI DANNEGGIAMENTO IN MODO MISTO I/II NEI MATERIALI COMPOSITI E NELLE GIUNZIONI ADESIVE

2018

E’ stato sviluppato un elemento coesivo in grado di connettere e simulare la crescita delle cricche tra sottodomini di elementi finiti modellati in modo indipendente con mesh incompatibili. L'approccio si basa su funzioni di penalità e presenta numerosi vantaggi rispetto alle tecniche FEM convenzionali nelle simulazioni di delaminazione. Il più importante è la possibilità di rilasciare una porzione dell'interfaccia più piccola della lunghezza degli elementi finiti locali. Pertanto la delaminazione non avanza solamente rilasciando i nodi del modello FEM, una limitazione comune a molti metodi trovati in letteratura. È stato anche sviluppato un nuovo approccio per modellare la crescita delle c…

Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineFinite Element Cohesive element Penalty Method Composite materials Delamination Mixed-mode propagation.
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