XIII International Conference on Computational Plasticity: fundamentals and applications (COMPLAS 2015), Barcelona, 1-3 September, 2015
Proceedings of the XIII International Conference on Computational Plasticity - Fundamentals and Applications
Held in Barcelona, Spain, 1-3 September 2015
A publication of:
International Center for Numerical Methods in Engineering (CIMNE) Barcelona, Spain
E. Oñate, D.R.J. Owen, D. Peric and M. Chiumenti (Eds.)
© The authors
Sumari
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Linking process, structure, and property in additive manufacturing applications through advanced materials modelling
(2015)
Text en actes de congrés
Accés obertAdditive manufacturing (AM) processes have the ability to build complex geometries from a wide variety of materials. A popular approach for metal-based AM processes involves the deposition of material particles on a substrate ... -
Plasticity for crushable granular materials via DEM
(2015)
Text en actes de congrés
Accés obertThe mechanical behavior of crushable granular materials is characterized by strong non-linearity and irreversibility. In this paper, the incremental behavior of crushable granular soils is investigated by numerically ... -
A Method for suppresion of defects in zigzag bending of sheet metal
(2015)
Text en actes de congrés
Accés obertThis study presents methods for suppression of defects observed in zigzag bending of sheet-metal or plate. This type of bending is widely used in industry for manufacturing structural parts in automobiles. Although it is ... -
Effect of initial thickness deviation and reduction on longitudinal and cross-sectional precision after tube drawing using plug
(2015)
Text en actes de congrés
Accés obertIn this research, 2D and 3D FEM models are composed for the clarification of the effect of initial thickness distribution on its distribution after drawing and the residual stresses. In the 2D FEM, the minimum bare element ... -
Estimation of lubricity by numerical method on surface of nbc-reinforced tool for hot steel rolling
(2015)
Text en actes de congrés
Accés obertInvestigation was carried out on the lubrication mechanism of NbC-reinforced tool for hot metal working. Observations on the surface of reinforced tool carried out after use to clarify that the tool surface was covered ... -
Fe simulation of the expansion of a WE43 magnesium alloy stent in a representative blood vessel
(2015)
Text en actes de congrés
Accés obertMagnesium alloys have been expected as bio-materials such as a stent for a blood vessel and a screw bolt for joining bones and so forth. Expansion deformation behavior of WE43 magnesium alloy, which have been adopted as ... -
Fundamental FEM analysis on tensile deformation of the sheet metal embossed on both sides of the plane
(2015)
Text en actes de congrés
Accés obertIn this study, the tensile test of the embossed sheet was conducted and the tensile deformation behavior is experimentally investigated. Also, in this study, the finite-element method (FEM) analysis on tensile deformation ... -
New cold-expansion process for end sizing and dimensional precision of inside geometry on both ends of line pipes
(2015)
Text en actes de congrés
Accés obertCold-expansion process has been developed for ensuring dimensional precision of inside geometry on the end portions of line pipe. For expanding the inside diameter of line pipe, a plug insertion method by cold press in the ... -
Reverse loading tests of steel tube under biaxial stress states
(2015)
Text en actes de congrés
Accés obertBiaxial loading and reverse loading tests were performed using seamless carbon steel tubes. Biaxial stress components in the axial and circumferential directions were applied to the tubular specimens using a servo-controlled ... -
Computation of eigenstresses in three-dimensional patient-specific arterial walls
(2015)
Text en actes de congrés
Accés obertIn this contribution we propose a numerical scheme for the incorporation of residual stresses inarterial walls.Throught he introduction of suitable stress in variants a local,time-independent residual stress tensor is ... -
Influence of interface zone behaviour in reinforced concrete under tension loading: an analysis based on modelling and digital image correlation
(2015)
Text en actes de congrés
Accés obertThe problem of durability in reinforced concrete structures is a major case of concern nowadays. The problem of leakage due to cracking phenomena in critical structures such as nuclear power plants is specifically significant. ... -
Elastoplastic modelling of a ventilation test in argillaceous rock
(2015)
Text en actes de congrés
Accés obertA full scale field test to evaluate the effects of ventilation in a tunnel excavated in Opalinus clay has been performed in the underground laboratory of Mont Terri in Switzerland. The test involved several stages of wetting ... -
Finite element modelling of shear bands in porous media by means of non-local viscoplasticity
(2015)
Text en actes de congrés
Accés obertThis work presents a consistent numerical approach in the framework of analyzing the localization process in a slope stability problem. An already existing model, embedded in Mechanics of multiphase porous media, is enhanced ... -
Modelling of propagation with sph of 1966 aberfan flowslide: special attention to the role of rheology and pore water pressure
(2015)
Text en actes de congrés
Accés obertLandslides can cause major economic damage and a large number of casualties as it is possible to see from past events occurred all over the world. Being able to predict these kind of hazards would then suppose the achievement ... -
Three-dimensional modelling of an embankment built on a soft soil improved with prefabricated vertical drains
(2015)
Text en actes de congrés
Accés obertThis work compares the field measurements of a non-symmetric embankment built on a Portuguese soft soil improved with prefabricated vertical drains (PVDs), with the numerical predictions of a 3D modelling where the PVDs ... -
Advanced material model for shear cutting of metal sheets
(2015)
Text en actes de congrés
Accés obertA finite-element simulation of the shear cutting process is used to predict thegeometry of the cutting surface. A fully-coupled Lemaitre-type model is used in the process model for the description of the material behaviour. ... -
Comparison of bifurcation analysis and maximum force criteria in the prediction of necking in stretched metal sheets
(2015)
Text en actes de congrés
Accés obertIn the present work, diffuse necking is investigated for stretched metal sheets using two different approaches, namely bifurcation theory and maximum force principle. The contribution includes a critical analysis and a ... -
Considerations on identification of damage parameters: a case study
(2015)
Text en actes de congrés
Accés obertThe steady growth of commercial codes in recent years has fostered applications of phenomenologica lapproaches to plasticity modelling in industrial settings. Further more, metal forming operations involving large plastic ... -
Numerical analysis of forming sheet panels with stiffening ribs
(2015)
Text en actes de congrés
Accés obertThe transport industry, especially aviation, pays special attention to vehicle weight because lower weight means lower fuel consumption and in turn lower environmental pollution. Not only light metals like aluminium and ... -
Numerical simulation of multi-directional hot forging for the reduction of forging defects
(2015)
Text en actes de congrés
Accés obertHot forging is a metal forming process widely used in the industry. Among the many advantages are the possibility of severe plastic deformation and the improvement of mechanical properties, leading to the continued development ... -
Atomistic modeling and simulation of long-term transport phenomena in nanomaterials
(2015)
Text en actes de congrés
Accés obertIn the past two decades, extensive research has been conducted towards developing nanomaterials with superior transport properties, such as heat conductivity and mass diffusivity, for applications in various industries ... -
Large scale validation of a new isotropic hardening law for the barcelona plastic damage model under ultra low cycle fatigue conditions
(2015)
Text en actes de congrés
Accés obertThis paper presents the results of finite element simulations made on a bent pipe subjected to an in-plane variable cyclic displacement combined with internal pressure. The results of the numerical analyses will be compared ... -
Model-wise algorithm for the resolution of fatigue problems
(2015)
Text en actes de congrés
Accés obertThe present work presents a general constitutive model formulation and a numerical algorithm for automatically selecting the appropriate coupling of damage and plasticity as a function of the number of cycles the material ... -
On exploiting the weak invariance of multiplicative elasto-plasticity for efficient numerical integration
(2015)
Text en actes de congrés
Accés obertThe paper is devoted to the efficient and robust implementation of a certain finite-strain plasticity model, formulated with in the popular multiplicative framework. The model was proposed by Shutov and Kreißig (2008), and ... -
Application oriented failure modeling and characterization for polymers in automotive pedestrian protection
(2015)
Text en actes de congrés
Accés obertIn the development process of automotive pedestrian protection (PedPro) for upper- and lower leg impact, the failure of polymer components plays an important role. To influence impact kinematics, fractures can either be ... -
Crash of 3D-braided thermoplastic tubes: numerical and analytical tools for behaviour prediction
(2015)
Text en actes de congrés
Accés obertThis article deals with the experiment and numerical simulation of the crash of composite tubes made of 2,5D-braided composite. First we present the material characterization at different strain rates as well as the results ... -
Crash simulations of electric cars in the EVERSAFE project
(2015)
Text en actes de congrés
Accés obertThis paper focuses on the passive safety part of the European project EVERSAFE, including cell level component tests as well as comprehensive simulations evaluating battery vulnerability. Partners involved in the passive ... -
Modelling and finite element simulation for FDSC multi-point forming based on ABAQUS
(2015)
Text en actes de congrés
Accés obertThis paper introduces the modeling and FEM simulation of FDSC Multi-Point Forming based on ABAQUS. Python is used as programming languages to secondary develop the software and to establish a simulation platform. An ... -
Numerical study of an arcan tensile compression shear test in dynamic: application to bonded joints
(2015)
Text en actes de congrés
Accés obertThis paper presents a numerical study of the Arcan TCS testing device under dynamic conditions. This test is commonly used to characterize the mechanical behavior of bonded joints subjected to combined quasi-static loadings. ... -
Reduced kinematic formulation based on the strong discontinuity method for reinforced concrete components
(2015)
Text en actes de congrés
Accés obertDamage models, developed in the last decades, insure a continuous description of the fracture process zone in quasi-brittle materials but fail at representing fine information of the cracking features such as openings and ... -
Modeling of heat and mass transfer induced by high temperature in concrete
(2015)
Text en actes de congrés
Accés obertIn the context of a long term development of a general meso-mechanical model for concrete under mechanical and environmental actions, this paper describes the on-going work to represent theheat and moisture transfer in ... -
Numerical testing of prestressed reinforced concrete structures with PRECON3D material model
(2015)
Text en actes de congrés
Accés obertSome time ago, we have developed a computer programme called PRECON3D for a three-dimensional non-linear analysis of reinforced and prestressed concrete structures where the structures are discretized by three-dimensional ... -
MRCT element with a dislocation based plasticity model
(2015)
Text en actes de congrés
Accés obertThe multiresolution continuum theory (MRCT) [1] has been established to link the material’s macroscopic behaviour with its microstructural inhomogeneities. Additional kinematic variables in addition to the conventional ... -
A constitutive model for the anelastic behavior of Advanced High Strength Steels
(2015)
Text en actes de congrés
Accés obertIn this work a physically based model describing the anelastic behaviour and nonlinear unloading in Advanced High Strength Steels (AHSS) is proposed. The model is fitted to the experimental data obtained from uni-axial ... -
Fractional-orderuniaxial visco-elasto-plastic models for structural analysis
(2015)
Text en actes de congrés
Accés obertThree fractional-order models for uniaxial large strains and rate-dependent plastic behavior of materials instructural analysis are proposed. Our approach is a menable to modeling nonlinear and more sophisticated effects ... -
Integration of elasto-plastic constitutive models infinite deformation: an explicit approach
(2015)
Text en actes de congrés
Accés obertThis paper highlights an explicit integration scheme for hyperelastic-based finite strains elasto-plastic models. One step update equations are obtained from the large deformation multiplicative elasto-plastic theory, where ... -
Modeling thermoelastoplasticity of composite materials
(2015)
Comunicació de congrés
Accés obertThe prediction of the thermoelastoplastic behaviors of composite materials and the corresponding constituents is essential and needs to be investigated from the theoretical and experimental aspects. One of the promising ... -
Modelling the residual stress of autofrettaged thick-walled common rails using isotropic and kinematic metal plasticity models compared to X-ray diffraction analysis
(2015)
Comunicació de congrés
Accés obertThe pressure in Diesel injection parts is continuously rising up to more than 2500 bar [1]. Especially the Common Rail as the pressure storage of the injection system is in focus of the recent technology development. To ... -
Simulation of reversed torsion of the AlMg6 aluminium bar using the macro-molecule approach
(2015)
Comunicació de congrés
Accés obertThe specified macro-molecule approach is tested using the reversed-torsion load case for the 30×10×10 (mm) bar made of AlMg6 aluminium alloy. The work has two parts: the experiment part and the calculation part. The ... -
Two level investigation of plasticity driven growth of nanovoids under high rate tension of aluminum
(2015)
Comunicació de congrés
Accés obertWith the help of molecular dynamics simulations the mechanism of nanovoid growth in aluminum under high rate tension is studied. We interpret the growth of nanovoids as the result of plastic deformation in zone close to ... -
Numerical study of intervertebral prosthesis
(2015)
Comunicació de congrés
Accés obertLumbar interbody fusion is a lumbar surgical procedure that consists of replacing the intervertebral disk with a stiff prosthetic device (the fusion cage), with the purpose of promoting bone growth in between the two ... -
Opening angle of human saphenous vein
(2015)
Comunicació de congrés
Accés obertIn this study, the residual strain was evaluated for human saphenous vein. Rings of the vein from four donors (two male and two female; age 62±5 years) were radially cut to obtain the opening angle (α) of the tissue. It ... -
Constitutive modelling of human perivascular adipose tissue
(2015)
Comunicació de congrés
Accés obertThe mechanical properties of adipose tissue are studied rarely despite the fact that surrounding tissue plays an important role in arterial physiology and mechanobiology. This study deals with the determination of material ... -
Behavior of reinforced concrete short rectangular columns strengthened by steel lattice framed jacket
(2015)
Comunicació de congrés
Accés obertThe complete derivation of the more exact solution that controlled the behaviour of reinforced concrete short rectangular column strengthened by steel lattice frame jacket is presented including the effect of bond slip ... -
Efficient implementation of a component-based joint model
(2015)
Comunicació de congrés
Accés obertThis paper deals with a nonlinear analysis of beam-to-column steel joint. The connection uses an end-plate welded to the steel cross-section of a steel-concrete composite beam and bolted to the column flange. The proposed ... -
Finite element analysis of R.C. Arches with openings strengthened by CFRP laminates
(2015)
Comunicació de congrés
Accés obertThe main objective of this research is to present an analytical study to investigate the behavior and performance of reinforced concrete arches with and without openings , un-strengthened and strengthened (externally by ... -
Flexural behavior of steel concrete composite beam with web openings and strengthened by CFRP laminates
(2015)
Comunicació de congrés
Accés obertThe present study is aiming to investigate the structural behavior of simply supported composite beams in which a concrete slab is connected withsteel beam by headed stud shear connector or by using epoxy layer as a shear ... -
A numerical method for calculating the strain rate intensity factor
(2015)
Comunicació de congrés
Accés obertThe strain rate intensity factor is the coefficient of the leading singular term in a series expansion of the equivalent strain rate in the vicinity of maximum friction surfaces. In the case of rigid perfectly plastic ... -
Limit analysis on evaluation of lateral resistance of partially embedded pipes with frictional pipe-soil interface
(2015)
Comunicació de congrés
Accés obertThe occurrence of controlled lateral buckling in unde rwater pipes maybe an eficient mechanism in order to relief high compressive stresses developed along its length.Thus,modelling this phenomenon is worthy to evaluate ... -
Numerical study of conditions for subsurface shear instability under contact interaction
(2015)
Comunicació de congrés
Accés obertNumerical modeling of nanostructuring burnishing has been carried out to reveal the limiting values of process parameters, which serve both to provide the appropriate surface quality and positive deformation-induced ... -
A robust and efficient 3D constitutive law to describe the response of quasi-brittle materials subjected to reverse cyclic loading: formulation, identification and application to a RC shear wall
(2015)
Comunicació de congrés
Accés obertIn this paper, a new constitutive law aiming at describing the quasi-brittle behavior when subjected to cyclic loading is presented.The proposed model is formulated with in the frame work of isotròpic contínuum damage ... -
Investigation of ductile fracture in fine blanking processes and virtual prediction of scar formation by means of 3D ALE simulations
(2015)
Comunicació de congrés
Accés obert -
Modeling of the behavior in high-cycle fatigue based on the coupling plasticity-damage in a mesoscopic scale
(2015)
Comunicació de congrés
Accés obertThe methods of prediction of lifespan in high cycle fatigue are under development since decades and are used by engineers to dimension the structures. The purpose of the work presented in this paper is to establish a ... -
Modeling of plastic hinges in seismic structural analysis using lusas
(2015)
Comunicació de congrés
Accés obertThis paper gives an overview of the inelastic (or hysteresis) hinge (or joint) models implemented in LUSAS in recent years, which are a systematization and generalization of the typical models developed by researchers in ... -
Multi-scale and multi-chemo-physics analysis applied to fatigue life assessment of strengthened bridge decks
(2015)
Comunicació de congrés
Accés obertReinforced concrete decks submerged in water suffer from considerable deterioration owing to high cycle repetition of traffic loads with increasing rise of inter-crack water pressure, which leads to serious damages to the ... -
Numerical simulations of corners in RC frames using Strut-and-Tie method and CDP model
(2015)
Comunicació de congrés
Accés obertCorners of reinforced concrete frames under opening bending moment should be always considered in complex stress conditions. A proper reinforcement of these corners demands some special methods instead of traditional ... -
Simulation of damage growth in pre-notched cylindrical test specimens using continuum damage mechanics model
(2015)
Comunicació de congrés
Accés obertDuctile fracture occurs due to micro-void nucleation, growth and, finally coalescence into micro-cracks. These micro-cracks grow as the deformation progresses. Nowadays, continuum damage mechanics model is employed as one ... -
The influence of the graphite mechanical properties on the constitutive response of a ferritic ductile cast iron – a micromechanical FE analysis
(2015)
Comunicació de congrés
Accés obertIn the present paper a micro-mechanical approach is used to investigate the influence of the graphite mechanical properties on the loading response in the early deformation range of ductile cast iron. A periodic unit cell ... -
3D analysis of H-M coupled problem with zero-thickness interface elements applied to geomechanics
(2015)
Comunicació de congrés
Accés obertIn spite of the significant developments seen in recent years,numerical modelin of Hydraulic Fracturing still poses major challenges due to the strong coupling between fluid flow and crack development,which is itself a ... -
Anisotropic failure criterion for an argillaceous rock: formulation and application to an underground excavation case
(2015)
Comunicació de congrés
Accés obert -
Modelling infiltration tests on pelletized bentonite under non-isothermal conditions
(2015)
Accés obertA promising alternative to construct engineered barriers for high level nuclear waste repositories is the use of pellets-based material because high dry densities can be achieved with no or minimal compaction effort. It ... -
Numerical stress initialization in geomechanics via the FEM and a two-step procedure
(2015)
Comunicació de congrés
Accés obertThe knowledge of the in-situ stress field in rock masses is crucial in different areas of geo-engineering, such as mining or civil underground excavations, hydrocarbon extraction, CO2 storage, hydraulic fracture operations, ... -
XFEM formulation for discontinuities in fractured rock masses
(2015)
Comunicació de congrés
Accés obertThe paper describes some aspects of the application of XFEM to represent Geomechanical discontinuities, including the choice of additional nodal variables and the appearance and remedies to the oscillations that may take ... -
A multi-phase-field simulation of carbon steel under actual conditions of a hot rolling process
(2015)
Comunicació de congrés
Accés obert -
Analysis of camber formation, suppression and control in hot rolling of wedge-shaped slabs by utilizing fem and analytical concepts
(2015)
Comunicació de congrés
Accés obertReducing wedge without generating camber is still a big challenge for today’s process automation systems for hot strip mills. Therefore, detailed transient 3D-models of the underlying severely asymmetric flat hot rolling ... -
Effect of blank dimension on formability of forging blank consisting of two metals
(2015)
Comunicació de congrés
Accés obertWe established aforging analysis method for a blank consisting of two metals. In this study, we evaluated the effect of the blank dimensions on the formability of a blank using this analysis method. The analysis results ... -
Finite element modelling of cold pilgering of tubes
(2015)
Comunicació de congrés
Accés obertCold pilgering is a cold forming process used during manufacturing of seamless tubes. The tube with a mandrel inside is fed forward and rotated in stepwise increments, while the roll stand moves back and forth. The total ... -
Increasing numerical efficiency in coupled Eulerian-Lagrangian metal forming simulations
(2015)
Comunicació de congrés
Accés obertThe coupled Eulerian-Lagrangian formulation is an efficient tool for modelling and simulation of metal forming processes with large deformation. In many cases, thermo-mechanical coupling has to be considered. Usually the ... -
Influences of yield criteria on stress based forming limit diagram of DP980 steel
(2015)
Comunicació de congrés
Accés obertIn this study, experimental and numerical determination of forming limit stress diagram (FLSD) for an advanced high strength (AHS) steel grade 980 were carried out. Forming limit curve (FLC) of the steel was first ... -
Modelling hot levelling processes by utilising arbitrary Lagrangian Eulerian (ALE) concepts
(2015)
Comunicació de congrés
Accés obert -
Optimization strategies and statistical analysis for springback compensation in sheet metal forming
(2015)
Comunicació de congrés
Accés obertGeometrical in accuracies of sheet metal parts due to springback are one of the main sources of lack of dimensional accuracy. Therefore, when designing a process to obtain a piece,it is mandatory to take in to consideration ... -
Recent advances in residual stress simulation caused by the welding process
(2015)
Comunicació de congrés
Accés obertThe purpose of the present paper is to improve the description of residual stress field characteristics generated after welding. The behavior of the material both in the liquidand solid states and during all heating and ... -
Robust optimization strategies for sheet metal springback compensation
(2015)
Comunicació de congrés
Accés obert.Sheet metal forming is a major industrial process, mainly due to its cost efficiency after the establishment of the processdesign. However, the process design from tools geometry to load conditions is not straightforward, ... -
Springback of FDSC MPF for cylindrical surfaces
(2015)
Comunicació de congrés
Accés obertIn this paper, Force-Displacement Separated Control Multi-Point Forming technology (FDSC MPF), a new technology of sheet metal forming isproposed. Through controlling displacement by upper die and controlling force by lower ... -
The influence of combined sheet metal forming on the increasing formability by experimental and numerical investigations
(2015)
Comunicació de congrés
Accés obert -
A multi-mechanism model for cutting simulations based on the concept of generalized stresses
(2015)
Comunicació de congrés
Accés obertBased on the concept to of generalized stresses as proposed by Gurtin [6] and Forest [4], we extend an existing model for strain rate- and temperature-dependent asymmetric plastic material behavior accompanied by phase ... -
Automated shape optimization using a multigrid method and estimation of distribution algorithms
(2015)
Comunicació de congrés
Accés obertTopological shape optimization refers to the problem of finding the optimal shape of a mechanical structure by using a process for removing or inserting new holes or parts, it is to say, using a process which produces ... -
Application of the proper generalized decomposition to elasto-plastic finite element analysis
(2015)
Comunicació de congrés
Accés obertThe aim of this paper is to develop the PGD for time dependent elastoplastic problems with cyclic loadings. The objective is to show that the PGD can be well suited for simulating a ratchet effect by separating ... -
How to simplify return-mapping algorithms in computational plasticity: part 1 - main idea
(2015)
Comunicació de congrés
Accés obertAn improved implicit return-mapping scheme for nonsmooth yield surfaces is suggested in this paper. It is based on a subdifferential formulation of the flow rule that does not require special treatment at singular points ... -
How to simplify return-mapping algorithms in computational plasticity: part 2 –implementation details and experiments
(2015)
Comunicació de congrés
Accés obertThe paper is devoted to numerical solution of a small-strain quasi-static elastoplastic problem. It is considered an isotropic model containing the Drucker-Prager yield criterion, a non-associative flow rule and a nonlinear ... -
Iterative limit analysis of structures within a scaled boundary finite element framework
(2015)
Comunicació de congrés
Accés obertThis paper presents an iterative elastic analysis approach to determine the collapse load limit of structures. The proposed scheme is based on the use of a modified elastic compensation method, where the structure ... -
Lower bound element and submodel for modelling of joints between precast concrete panels
(2015)
Comunicació de congrés
Accés obertIn practice, precast concrete structures are designed using either analytical methods or linear finite element tools, and the in-situ cast joints between the precast panels are assessed using conservative empirical design ... -
A recursive calculation of the consistent tangent operator in elasto-plasticity
(2015)
Comunicació de congrés
Accés obertThe paper presents a derivation of the consistent tangent operator (CTO) for the class of iterative constitutive integration algorithms. The derivation is based on a variational analysis of algorithmic equations with respect ... -
Shakedown analysis of 3D frames subjected to complex statical and seismic load combinations
(2015)
Comunicació de congrés
Accés obertThe paper proposes a strategy for the treatment of load combinations making the shakedown analysis an affordable design tool for practical applications. The paper refers to 3D frames subjected to complex combinations of ... -
Similarity methods in elasto-plastic beam bending
(2015)
Comunicació de congrés
Accés obertIn industrial metal forming processes a large number of parameters has to be considered. As is well known, this number can be reduced by a non-dimensional representation. Based on the example of an elasto-plastic cantilever ... -
Sources of error and limits of applying the energetic-based-regularization method
(2015)
Comunicació de congrés
Accés obertIn this work, the energetic regularization technique based on the Crack Band approach is studied. The main objective is to identify the sources of errors related to the application of such technique under 2D and 3D ... -
A two-scale constitutive parameters identification procedure for elasto-plastic fracture
(2015)
Comunicació de congrés
Accés obertConstitutive parameters identification for elasto-plastic fracture is a complex problem due to the interplay between two forms of material nonlinearity, viz. plasticity and cohesive fracture. In the present study we examine ... -
Accelerating the hierarchical multi-scale software by spatial clustering strategies
(2015)
Comunicació de congrés
Accés obertIn multi-scale simulations of material forming processes, macroscopic zones of nearly homogeneous strain response can be observed. In such zones the evolution of material properties at each finite element integration point ... -
Chemo-hygral model for asr expansion and its effects on fatigue lives of bridge slabs
(2015)
Comunicació de congrés
Accés obertFor evaluating damages of structural concrete by alkali silica reaction (ASR), an analytical platform to rationally deal with the complex interaction of multi-scale chemo- physics events is being developed. For experimental ... -
Efficient computational homogenization of simple elasto-plastic microstructures using a modified Ritz-Galerkin approach
(2015)
Comunicació de congrés
Accés obertIn this presentation, a recent work [18] on a fast nonlinear homogenization method for simple microstructures is revised. The degrees of freedom of the approach are defined on shear bands. Moreover, the number of degrees ... -
Modeling with FCA-based model of microstructure evolution in ultra-thin wires of MgCa0.8 alloy during hot drawing
(2015)
Comunicació de congrés
Accés obertMagnesium alloys are widely applied in medicine due to their high biocompatibility and solubility in human body. For example, they could be applied for surgical threads used for integration of tissue [1,2]. This application ... -
Numerical modelling of the wedge splitting test in rock specimens, using fracture-based zero-thickness interface elements
(2015)
Comunicació de congrés
Accés obertThe purpose of the Wedge Splitting Test (WST) is to generate stable mode I fracture crack along a pre-established path, and be able to measure the specific fracture energy parameter of the material GFI. The test is performed ... -
Features of interface formation in crystallites under mechanically activated diffusion. A molecular dynamics study.
(2015)
Comunicació de congrés
Accés obertIn this paper, we carried out investigation of behavior of the material under loading condition identical those used in FSW using molecular dynamic method. The loading was modelled by a rigid rotating “tool” that movies ... -
Interaction between dislocation and coherent twin boundary by quasicontinuum model
(2015)
Comunicació de congrés
Accés obertThe interaction between lattice dislocations and Coherent Twin Boundary Σ3{111} of copper has been studied using Quasi-Continuum method. The coherent twin boundary provides high barrier to slip transmission. The dislocation ... -
Simulation of nanoparticle formation under synchronous electric pulse explosion of metal wires
(2015)
Comunicació de congrés
Accés obertThe paper is devoted to molecular dynamics simulation of the formation of bicomponent nanoparticles in simultaneous electric explosion of copper and nickel conductors. The influence of the distance between conductors on ... -
The role of the excess volume at the nucleation of plastic deformation in metals
(2015)
Comunicació de congrés
Accés obertThe computer simulation results on the atomic structure of the copper crystallite and its behavior in nanoindentation demonstrate the key role of local structural transformations in nucleation of plasticity. The generation ... -
Application of finite discrete element method in dynamic analysis of masonry structures
(2015)
Comunicació de congrés
Accés obertThis paper presents the application of the numerical models for dynamic analysis of dry stone masonry structures strengthened with clamps and bolts and confined masonry structures based on finite discrete element method ... -
Damage plastic model for concrete failure under impulsive loadings
(2015)
Comunicació de congrés
Accés obertThe IRIS 2012 benchmark [1] was devoted to compare various modelling of impact on reinforced concrete slabs. Its aim was to improve the methods used and to provide guidance to assess the integrity of structures impacted ... -
Mesomechanical analysis of concrete under loading that generates rotation of cracking
(2015)
Comunicació de congrés
Accés obertWillam´s test has been often used to compare constitutive models which take into account induced anisotropy due to damage and cracking. This numerical test emulates the continuous rotation of the principal stress and ... -
Non-linear static analysis of masonry structures
(2015)
Comunicació de congrés
Accés obertA meso-scale model is used to model a masonry structure where bricks are modelled using finite volume elements and mortar joints are modelled using finite interface elements. A plasticity based cohesive zone model is used ... -
Simulations of fracture in concrete beams under bending using a continuum and discrete approach
(2015)
Comunicació de congrés
Accés obertThe paper describes two-dimensional meso-scale results of fracture in notched concrete beams under bending. Concrete was modelled as a random heterogeneous 4-phase material composed of aggregate particles, cement matrix, ... -
Parallel 3D limit analysis via the alternating direction method of multipliers
(2015)
Comunicació de congrés
Accés obertThis document presents a parallelized implementation of a FEM formulation concerning both the upper and lower bound limit analysis theorems. By applying these methods to evaluate the stability of a vertical cut ... -
Parallelization of BiCGMisR method with cache-cache elements preconditioning
(2015)
Comunicació de congrés
Accés obertWe consider Krylov subspace methods for solving a linear system of equations on parallel computer with distributed memory. For speed-up of parallel computation, it is necessary to shorten the communication time among ...
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