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Showing 1 to 12 of 12 for “"Cohesive Zone Models"”.
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Dynamic Fracture of Adhesively Bonded Composite Structures Using Cohesive Zone Models
… of cracks without specifying an initial crack. A cohesive-decohesive zone model, similar to the cohesive zone model known in the fracture mechanics literature as the Dugdale-Barenblatt model, is adopted to represent the degradation of the material ahead of the crack tip. This model unifies …
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Simulation of delamination in composite materials under static and fatigue loading by cohesive zone models
… work presents an examination of the potential of cohesive interface elements for the prediction of delamination propagation under quasi-static mode I, mode II and mixed mode (I and II) loading, by a comparison between experimental tests and parametric analyses in order to evaluate the sensitivity …
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Development of filled polymers for the replacement of ceramics used as ballistic protection layer
… to the particle/matrix debonding mechanism. Cohesive zone models (CZM) and Finite Fracture Mechanics (FFM) approaches were used to model this phenomenon and a strong effect of the particle size on decohesion was observed.
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A Multiscale Method for Simulating Fracture in Polycrystalline Metals
… dynamics simulation and are mapped into cohesive zone models for continuum modeling within a finite element framework. Fracture along grain boundaries typically exhibit a dependence of crack tip processes (i.e. void nucleation in brittle cleavage or dislocation emission in ductile …
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Cohesive zone modeling of fracture of sustainable and functionally graded concrete
… is developed; which incorporates a variety of cohesive zone models (CZMs) into an implicit, nonlinear finite element scheme. Intrinsic cohesive zone elements, with traction-separation relationships defined along the crack surface, are utilized to simulate mode I fracture of the slabs. Based on …
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Micromechanical Behavior of Fiber-Reinforced Composites using Finite Element Simulation and Deep Learning
… level through simulating large numerical models. Such an investigation demands an efficient numerical framework along with significant computational power. Hence, an efficient numerical framework was developed for simulating 2-D representations of CFRP composites' microstructure. The …
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Experimental and Numerical Methods for Characterizing the Mixed-Mode Fracture Envelope for a Tough Epoxy
… using finite element analysis (FEA) with cohesive zone models (CZMs) to model the adhesive layer. CZM parameters such as fracture energies and traction separation law (TSL) shapes were determined from experimental data and published literature. Results from CZMs were compared to …
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Next generation computational tools for extreme-scale simulation of dynamic fracture and fragmentation in three dimensions
… (DG) formulation of the continuum problem and Cohesive Zone Models (CZM) of fracture. Prior to fracture, the flux and stabilization terms arising from the DG formulation at interelement boundaries are enforced via interface elements, much like in conventional approaches based on CZM. Upon the …
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A scalable computational approach for modeling dynamic fracture of brittle solids in three dimensions
… of the continuum elastodynamic problem with Cohesive Zone Models (CZM) of fracture. In the proposed framework, discontinuous displacement jumps are allowed to occur at all element boundaries in the pre-fracture regime in a manner similar to "intrinsic" cohesive element methods. However, owing …
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Multiscale Modeling of the Effects of Nanoscale Load Transfer on the Effective Elastic Properties of Carbon Nanotube-Polymer Nanocomposites
… elements for unfunctionalized CNT-PE interface models which are studied parametrically in terms of the length of the PE chains, the number of the PE chains and the "grip" position. Referring to the non-functionalized interface, CNTs interact with surrounding polymer only through weakly nonbonded …
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Crack path selection and shear toughening effects due to mixed mode loading and varied surface properties in beam-like adhesively bonded joints
… using the same material properties and cohesive zone model (CZM) parameters. The critical specimen length when the crack propagation pattern abruptly switches was experimentally measured and accurately predicted, building confidence in the subsequent studies where the numerical method …
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Failure processes in soft and quasi-brittle materials with nonhomogeneous microstructures
… referred to as interfacial debonding), we use cohesive zone elements which follow the Park-Paulino-Roesler traction-separation relation. To account for friction, we present a new, coupled cohesive-friction relation and detail its formulation and implementation. In the process of this …