Finite Element Modelling Of Compartment Fire Using ABAQUS

2015 ◽  
Vol 74 (4) ◽  
Author(s):  
Mariyana A. A. K. ◽  
A. S. M. Abdul Awal ◽  
Mahmood Md. Tahir
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Elevated Temperature ◽  
Finite Element Model ◽  
Finite Element Modelling ◽  
Fire Test ◽  
Element Model ◽  
Compartment Fire ◽  
Element Modelling ◽  
The Finite Element Model

This paper presents finite element modelling (FEM) of a reinforced concrete (RC) frame subjected to elevated temperature. The work presented is part of the UK-India Education and Research Initiative (UKIERI) project. In this project, an experimental test of sub-assemblage frame with elevated temperature has been performed at Indian Institute of Technology (IIT) Roorkee, India. The finite element model using ABAQUS software has been used to validate the increased in temperature distribution on reinforced concrete frame exposed to fire. The idea of this study is to design a compartment fire, and determination of emissivity value at different height. And composition of hot gases was calculated. Gas temperatures used was based on the average temperature-curve obtained in the fire test. The validity of the finite element model was established by comparing the predicted values from the FEM with test data direct from fire test results. The results obtained indicate that suggested FEM analysis procedure is capable of modelling temperature in compartment fires.  

Finite-Element Modelling of Ballistic Impact of Plain-Woven Aramid Fabric

2014 ◽  
Vol 553 ◽  
pp. 769-773 ◽  
Author(s):  
E.A. Flores-Johnson ◽  
J.G. Carrillo ◽  
R.A. Gamboa ◽  
Lu Ming Shen
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Finite Element Modelling ◽  
Permanent Deformation ◽  
Element Model ◽  
Ballistic Impact ◽  
Elastic Model ◽  
Numerical Predictions ◽  
Aramid Fabric ◽  
The Finite Element Model

In this work, a 3D finite-element model of the ballistic impact of a multi-layered plain-woven aramid fabric style 720 (Kevlar®129 fibre, 1420 denier, 20×20 yarns per inch) impacted by a 6.7-mm spherical projectile was built at the mesoscale in Abaqus/Explicit by modelling individual crimped yarns. Material properties and yarn geometry for the model were obtained from reported experimental observations. An orthotropic elastic model with a failure criterion based on the tensile strength of the yarns was used. Numerical predictions were compared with available experimental data. It was found that the finite-element model can reproduce the physical experimental observations, such as the straining of primary yarns and pyramidal-shaped deformation after perforation. The permanent deformation of fabric targets predicted by the numerical simulations was compared with available experimental results. It was found that the model fairly predicted the permanent deformation with a difference of about 21% when compared with experiments.

scholarly journals Validation of a wide plate finite element model using digital image correlation

2011 ◽  
Vol 2 (3) ◽  
pp. 416-423
Author(s):  
K. De Keyser ◽  
F. Van Acker ◽  
Stijn Hertelé ◽  
Matthias Verstraete ◽  
Wim De Waele ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Finite Element Modelling ◽  
Element Model ◽  
Image Correlation ◽  
Defect Tolerance ◽  
Plastic Deformations ◽  
Test Setup ◽  
Element Modelling ◽  
Weld Defect

To investigate the influence of global plastic deformations on girth weld defect tolerance inpipelines, a parametric finite element model has been developed. This paper provides an experimentalvalidation of the model. It describes the test setup and instrumentation used for the evaluation of plasticstrain fields around a notch in a tension loaded non-welded X65 mini wide plate. LVDT measurements anddigital image correlation (DIC) results are compared to each other and to the results of finite elementsimulations. Whereas some deviation is observed owing to unavoidable experimental uncertainties andlimitations of finite element modelling, the overall correspondence is more than satisfying.

Investigation on Influence Factors of Bulging of Boren Steel at Elevated Temperature

2009 ◽  
Vol 628-629 ◽  
pp. 563-568
Author(s):  
Jun Ying Min ◽  
Jian Ping Lin ◽  
Guo Hua Sun ◽  
Wen Hua Bao
Keyword(s):  
Finite Element ◽  
Elevated Temperature ◽  
Finite Element Model ◽  
Minimum Temperature ◽  
Hot Stamping ◽  
Influence Factors ◽  
Element Model ◽  
Boron Steel ◽  
Steel Sheets ◽  
The Finite Element Model

The finite element model of bulging at elevated temperature was established by using of pam-stamp 2007. The bulging tests of boron steel sheets were also performed on the self-designed and manufactured tool system. The simulated results of bulging height, limit strain and the minimum temperature of specimens are consistent with that of tests. It demonstrates the validity and accuracy of the finite element model established in pam-stamp. The influences of the friction coefficient, the temperature and the stamping velocity on the hot bulging are analyzed numerically. The friction condition should be improved and the minimum temperature gradient is recommended in practical hot stamping production.

scholarly journals Finite Element Model Updating of Reinforced Concrete Beams with Honeycomb Damage

2012 ◽  
Vol 58 (2) ◽  
pp. 135-151 ◽  
Author(s):  
Z. Ismail
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Model ◽  
Model Updating ◽  
Element Model ◽  
Significant Loss ◽  
Reinforced Concrete Beams ◽  
Finite Element Model Updating ◽  
Finite Element Models ◽  
The Finite Element Model

Abstract A method of detecting honeycombing damage in a reinforced concrete beam using the finite element model updating technique was proposed. A control beam and two finite element models representing different severity of damage were constructed using available software and the defect parameters were updated. Analyses were performed on the finite element models to approximate the modal parameters. A datum and a control finite element model to match the datum test beams with honeycombs were prepared. Results from the finite element model were corrected by updating the Young’s modulus and the damage parameters. There was a loss of stiffness of 3% for one case, and a loss of 7% for another. The more severe the damage, the higher the loss of stiffness. There was no significant loss of stiffness by doubling the volume of the honeycombs.

scholarly journals Comparison of Meshing Strategies in THR Finite Element Modelling

Materials ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2332 ◽  
Author(s):  
Alessandro Ruggiero ◽  
Roberto D’Amato ◽  
Saverio Affatato
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Finite Element Modelling ◽  
Internal Surface ◽  
Element Model ◽  
Computational Effort ◽  
Von Mises Stress ◽  
Acetabular Cup ◽  
Element Modelling ◽  
Multibody Model

In biomechanics and orthopedics, finite element modelling allows simulating complex problems, and in the last few years, it has been widely used in many applications, also in the field of biomechanics and biotribology. As is known, one crucial point of FEM (finite element model) is the discretization of the physical domain, and this procedure is called meshing. A well-designed mesh is necessary in order to achieve accurate results with an acceptable computational effort. The aim of this work is to test a finite element model to simulate the dry frictionless contact conditions of a hip joint prosthesis (a femoral head against an acetabular cup) in a soft bearing configuration by comparing the performances of 12 common meshing strategies. In the simulations, total deformation of the internal surface of the cup, contact pressure, and the equivalent von Mises stress are evaluated by using loads and kinematic conditions during a typical gait, obtained from a previous work using a musculoskeletal multibody model. Moreover, accounting for appropriate mesh quality metrics, the results are discussed, underlining the best choice we identified after the large amount of numerical simulations performed.

Voxel-based finite element modelling of wood elements based on spatial density and geometry data using computed tomography

Holzforschung ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jens U. Hartig ◽  
André Bieberle ◽  
Chris Engmann ◽  
Peer Haller
Keyword(s):  
Finite Element ◽  
Material Properties ◽  
Strain Distribution ◽  
Finite Element Modelling ◽  
Element Model ◽  
Spatial Density ◽  
Stress And Strain ◽  
Element Modelling ◽  
Stress And Strain Distribution ◽  
The Finite Element Model

Abstract In this paper, voxel-based finite element modelling based on spatial geometry and density data is applied to simulate the detailed stress and strain distribution in a large wood element. As example, a moulded wooden tube with a length of 3 m and a diameter of 0.3 m is examined. Gamma-ray computed tomography is used to obtain both, its actual geometric shape and spatial density distribution. Correlation functions (R2 ≈ 0.6) between density and elastic material properties are experimentally determined and serve as link for defining the non-uniform distribution of the material properties in the finite element model. Considering the geometric imperfections and spatial variation of the material properties, a detailed analysis of the stress and strain distribution of a wood element is performed. Additionally, a non-destructive axial compression test is applied on the wooden tube to analyse the load-bearing behaviour. By means of digital image correlation, the deformation of the surface is obtained, which also serves for validation of the finite element model in terms of strain distributions.

Crystal Plasticity Finite Element Modelling of BCC Deformation Texture in Cold Rolling

2008 ◽  
Vol 32 ◽  
pp. 251-254 ◽  
Author(s):  
Hei Jie Li ◽  
Jing Tao Han ◽  
Zheng Yi Jiang ◽  
Hua Chun Pi ◽  
Dong Bin Wei ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Crystal Plasticity ◽  
Finite Element Modelling ◽  
Rolling Texture ◽  
Element Model ◽  
Deformation Texture ◽  
Type Model ◽  
Element Modelling ◽  
Crystal Plasticity Finite Element

Taylor-type and finite element polycrstal models have been embedded into the commercial finite element code ABAQUS to carry out the crystal plasticity finite element modelling of BCC deformation texture based on rate dependent crystal constitutive equations. Initial orientations measured by EBSD were directly used in crystal plasticity finite element model to simulate the development of rolling texture of IF steel under various reductions. The calculated results are in good agreement with the experimental values. The predicted and measured textures tend to sharper with an increase of reduction, and the texture obtained from the Taylor-type model is much stronger than that by finite element model. The rolling textures calculated with 48 {110}<110>, {112}<111> and {123}<111> slip systems are close to the EBSD results.

Viscoelastic Finite-Element Modelling of Neutrophil Deformation in a Tapered Micropipette

2008 ◽  
Author(s):  
Soo Kng Teo ◽  
Kim H. Parker ◽  
K.-H. Chiam
Keyword(s):  
Finite Element ◽  
Computational Modeling ◽  
Equilibrium State ◽  
Finite Element Model ◽  
Rheological Properties ◽  
Finite Element Modelling ◽  
Element Model ◽  
Temporal Variations ◽  
Quantitative Information ◽  
Element Modelling

In this paper, we discuss the results arising from using a viscoelastic, axisymmetric finite-element model [1] to study the aspiration of neutrophils into a tapered micropipette [2]. The key feature of our model is that we take into account the experimentally observed temporal variations in the rheological properties of deforming neutrophils [3]. We show that our model successfully reproduces the equilibrium state reached by a neutrophil subjected to a constant step pressure [2]. We are also able to extract quantitative information about the rate at which the rheological properties of the neutrophil change. Such information may be difficult to obtain directly from the experiments themselves. Thus, our approach illustrates the usefulness of computational modeling as a complement to experiments.

A critical review on the three-dimensional finite element modelling of the compression therapy for chronic venous insufficiency

2019 ◽  
Vol 233 (11) ◽  
pp. 1089-1099 ◽  
Author(s):  
Yongtao Lu ◽  
Zhuoyue Yang ◽  
Yongxuan Wang
Keyword(s):  
Finite Element ◽  
Chronic Venous Insufficiency ◽  
Finite Element Modelling ◽  
Venous Insufficiency ◽  
Computational Modelling ◽  
Compression Therapy ◽  
Element Model ◽  
Material Models ◽  
Element Modelling ◽  
The Finite Element Model

Compression therapy is an adjuvant physical intervention providing the benefits of calibrated compression and controlled stretch and consequently is increasingly applied for the treatment of chronic venous insufficiency. However, the mechanism of the compression therapy for chronic venous insufficiency is still unclear. To elaborate the mechanism of compression therapy, in recent years, the computational modelling technique, especially the finite element modelling method, has been widely used. However, there are still many unclear issues regarding the finite element modelling of compression therapy, for example, the selection of appropriate material models, the validation of the finite element predictions, the post-processing of the results. To shed light on these unclear issues, this study provides a state-of-the-art review on the application of finite element modelling technique in the compression therapy for chronic venous insufficiency. The aims of the present study are as follows: (1) to provide guidance on the application of the finite element technique in healthcare and relevant fields, (2) to enhance the understanding of the mechanism of compression therapy and (3) to foster the collaborations among different disciplines. To achieve these aims, the following parts are reviewed: (1) the background on chronic venous insufficiency and the computational modelling approach, (2) the acquisition of medical images and the procedure for generating the finite element model, (3) the definition of material models in the finite element model, (4) the methods for validating the finite element predictions, (5) the post-processing of the finite element results and (6) future challenges in the finite element modelling of compression therapy.

Finite Element Modelling of Reinforced Concrete Slab at Elevated Temperature Using ABAQUS

2015 ◽  
Vol 752-753 ◽  
pp. 623-627
Author(s):  
Mariyana Aida Ab-Kadir ◽  
A.S.M. Abdul Awal
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Elevated Temperature ◽  
Finite Element Modelling ◽  
Concrete Slab ◽  
Shell Element ◽  
General Purpose ◽  
Reinforced Concrete Slab ◽  
Finite Element Program ◽  
Element Modelling

This paper investigates the finite element modelling of the temperature distributions of reinforced concrete slab using a general purpose non-linear finite-element program, ABAQUS. The reinforced concrete slab is tested under exposure to designed fire in order to validate the shell element in in the ABAQUS program. The modelling results showed agreement with the fire test and it demonstrated that the ABAQUS shell element can be used to predict fire behaviour within reinforced concrete slab in elevated temperature conditions.

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