Fully meshfree numerical analysis of nonlocal damage in voxel-based material models from microtomography

In the paper, the influence of material model selection on the behaviour of Finite Element model of a compressed thin-walled channel is studied. Results of three material models of channels of two different lengths and two types of geometric imperfections are compared and discussed.

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Influence of Material Model on Tensile Loaded Joint

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.165.394 ◽

2010 ◽

Vol 165 ◽

pp. 394-399 ◽

Cited By ~ 1

Author(s):

E. Szymczyk ◽

Grzegorz Slawinski

Keyword(s):

Residual Stress ◽

Finite Element ◽

Numerical Analysis ◽

Stress Field ◽

Material Model ◽

Finite Element Simulations ◽

Residual Stress Field ◽

Material Models ◽

Riveted Joint ◽

Load Conditions

The paper deals with the numerical analysis of a tensile loaded riveted joint. Finite element simulations of the upsetting process were carried out with the use of Marc code to determine the residual stress field. The contact with friction is defined between the mating parts of the joint. The computations were performed for four cases of material and load conditions and a comparison was performed on the basis of results obtained for standard elasto plastic and Gurson material models. Moreover, the influence of material model and residual stress on the tensile loaded joint was analyzed.

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Numerical analysis and experimental verification of elastomer bending process with different material models

Open Engineering ◽

10.1515/eng-2016-0029 ◽

2016 ◽

Vol 6 (1) ◽

Author(s):

Stanislaw Kut ◽

Grazyna Ryzinska ◽

Bernadetta Niedzialek

Keyword(s):

Numerical Simulation ◽

Numerical Analysis ◽

Bending Test ◽

Uniaxial Tensile ◽

Uniaxial Tensile Test ◽

Material Models ◽

Material Constants ◽

Elastomeric Material ◽

Bending Process ◽

Tension Testing

Abstract The article presents the results of tests in order to verifying the effectiveness of the nine selected elastomeric material models (Neo-Hookean, Mooney with two and three constants, Signorini, Yeoh, Ogden, Arruda-Boyce, Gent and Marlow), which the material constants were determined in one material test - the uniaxial tension testing. The convergence assessment of nine analyzed models were made on the basis of their performance from an experimental bending test of the elastomer samples from the results of numerical calculations FEM for each material models. To calculate the material constants for the analyzed materials, a model has been generated by the stressstrain characteristics created as a result of experimental uniaxial tensile test with elastomeric dumbbell samples, taking into account the parameters received in its 18th cycle. Using such a calculated material constants numerical simulation of the bending process of a elastomeric, parallelepipedic sampleswere carried out using MARC / Mentat program.

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Possible use of the hyperelastic material models in numerical analysis of the wood-strand mat compression

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis ◽

10.11118/actaun200957040083 ◽

2009 ◽

Vol 57 (4) ◽

pp. 83-94

Author(s):

Václav Sebera ◽

Jan Tippner

Keyword(s):

Numerical Analysis ◽

Contact Pressure ◽

Degrees Of Freedom ◽

Material Model ◽

Hyperelastic Material ◽

Computational System ◽

Material Models ◽

Pressing Process ◽

Hyperelastic Model ◽

Wood Strand

The main goal of the work was to evaluate a possibility of using various hyperelastic material models implemented into ANSYS computational system for the numerical analysis of wood-strand mat pressing or wood-based composites. Subsequently, the most suitable hyperelastic model was used as a material model in compression simulation. Pressing itself was modelled as a contact transient analysis with wood-strand mat being defined as a homogenous and isotropic continuum with the chosen material model. In the analysis only displacement degrees of freedom are considered. Output of the simulation is a contact pressure, which is necessary to apply to compress the mat on the required height. The analysis serves as a take-off platform for further research in wood-based composites pressing process.

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Inelastic Material Models for Numerical Analysis of Unreinforced Compressed Masonry Columns

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.677.197 ◽

2016 ◽

Vol 677 ◽

pp. 197-202 ◽

Cited By ~ 1

Author(s):

Aneta Maroušková

Keyword(s):

Numerical Analysis ◽

Software Package ◽

Experimental Program ◽

Material Models ◽

Literature Research ◽

Future Goals ◽

Material Characteristics ◽

Inelastic Material ◽

Commercial Software Package

This paper deals with numerical analysis of unreinforced compressed masonry column. The experimental program is part of a research project NAKI [1]. Three material models usually used for simulation rock, soil, concrete and other quasi-brittle materials were assumed for numerical modelling of masonry column and mutually compared. The material characteristics were identified based on literature research since the needed mechanical properties were not available. The determination of own material characteristics and comparison numerical simulation with experimental test can be outlined as a future goals. For all simulations the commercial software package ABAQUS was used and the obtained numerical results are discussed.

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Numerical Simulation of Tornado Missile Impact on Steel Stack

Volume 4: Fluid-Structure Interaction ◽

10.1115/pvp2017-66110 ◽

2017 ◽

Author(s):

George Antaki ◽

Ramiz Gilada ◽

Derrick Pease

Keyword(s):

Experimental Data ◽

Numerical Simulation ◽

Numerical Analysis ◽

Failure Modes ◽

Material Models ◽

Design Basis ◽

Damage Criteria

This paper describes the methods and criteria for the numerical analysis of damage caused by tornado missiles to steel stacks. The paper will describe the range of classic design-basis tornado missiles, the target steel stacks, and the key parameters that affect the analysis. The models of missile and targets will be addressed, as well as the benchmark of calculated damage compared to experimental data. Strain-based material models and strain-based criteria will be described, to predict the various failure modes and the structural and functional damage criteria.

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Seismic Isolation Effect of a Tunnel Covered with Expanded Polystrene Geofoam

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.194-196.1943 ◽

2011 ◽

Vol 194-196 ◽

pp. 1943-1946

Author(s):

De Ling Wang

Keyword(s):

Elastic Modulus ◽

Numerical Analysis ◽

Seismic Isolation ◽

Axial Strain ◽

Isolation Effect ◽

Material Models ◽

Detailed Simulation ◽

Ground Stress ◽

Element Boundary ◽

Dynamic Damage

In this study, Expanded Polystrene (EPS) geofoam is used as seismic buffer to mitigate shock damage of tunnel by earthquake. Four types of EPS layer with different elastic modulus are selected to investigate their isolation effect. Four kinds of thickness are also selected to study the effect of thickness. All tunnels with different EPS layers are compared with each other and with the tunnel without EPS layer. Detailed simulation technology is described in this paper, including the infinite element boundary, initial ground stress balance and material models. The numerical analysis show that the axial strain and section force of lining are greatly reduced compared with the tunnel without EPS. With the decreasing elastic modulus and increasing EPS layer thickness, the mitigation effect is more obvious. And the isolation effect of reducing modulus is greater than that of increasing thickness. So modulus of EPS layer is a more important factor for mitigating dynamic damage.

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