Difference between revisions of "Textile mechanics"

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[[Image:Cottonweave.png|thumb|Figure 1. Cotton plain weave fabric with TexGen mesh displayed in in-house FE viewer]]
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TexGen has been used to create the geometry of fabrics for meso-scale textile mechanics modelling. Meshing can either be done directly within TexGen or geometry can be exported to the two most common CAD exchange file formats, IGES and STEP. Alternatively Python scripts can be used to transfer geometry to specific third party applications such as ABAQUS.
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[[Image:Thickness_comp_graph.png|thumb|Figure 2. Effect of fabric thickness on a plain weave unit cell compression ]]
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Mechanical models of commercial fabrics have been created in which textiles were meshed and then exported to the ABAQUS finite element analysis (FEA) package. Deformations were predicted for fabric unit cells in tension, compression, shear and bending, utilising their measured equivalents for individual yarns as input data.  Fig 1 shows a modelled deformed twill weave unit cell in tension, compression, shear and bending.  Validations of the FE predictions for the mechanical properties against experimental data are shown in Fig 2.
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<gallery caption="Figure 1. Deformed twill weave unit cell" >
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File:c5tension.png|Tension
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File:c5compression.png|Compression
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File:c5shear.png|Shear
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File:c5bending.png|Bending
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</gallery>
  
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TexGen has been used to create the geometry of fabrics for meso-scale textile mechanics modelling. Meshing can either be done directly within TexGen or geometry can be exported to the two most common CAD exchange file formats, IGES and STEP. Alternatively Python scripts can be used to transfer geometry to specific third party applications such as ABAQUS.
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<gallery caption="Figure 2. Experimental data versus FE predictions" >
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File:Bending Graph.png|Tension
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File:Compression Graph.png|Compression
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File:Shear Graph.png|Shear
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File:Bending Graph.png|Bending
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</gallery>
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==References==
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1. Hua Lin, Louise P Brown and Andrew C Long, "Modelling and Simulating Textile Structures using TexGen", Advanced Materials Research Vol. 331 (2011) pp 44-47
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2. H. Lin, X. Zeng, M. Sherburn, A. C. Long and M. J. Clifford. "Automated geometric modelling of textile structures", Textile Research Journal, v82, n16, 2012, pp. 1689-1702.
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3. H Lin, M J Clifford, A C Long, M Sherburn. “Finite element modelling of fabric shear”, Modelling and Simulation in Materials Science and Engineering, Vol.17, n1, 2009.
  
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The in-house finite element analysis software features periodic boundary conditions as well as a periodic contact algorithm eliminating the need for elements to be contained within a set unit cell. This is illustrated in the Figure 1. Deformations are applied by adjusting the repeat vectors. Using this approach, tensile and shear strains can easily be applied without overconstraining the model.
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4. H. Lin, A.C. Long, M. Sherburn, M. J. Clifford, "Modelling of mechanical behaviour for woven fabrics under combined loading", International Journal of material forming, Spring/ESAFORM 2008.
  
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Work using the commercial finite element software package ABAQUS has also been carried out investigating the effect of fabric architectures on fabric mechanical properties. Figure 2 shows the effect of yarn crimp height on a unit cell compression behaviour.
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5. H Lin, M Sherburn, J Crookston, A C Long, M J Clifford, I A Jones. “Finite element modelling of fabric compression”, Modelling and Simulation in Materials Science and Engineering, Vol.16, n3, 2008.

Latest revision as of 14:07, 6 February 2018

TexGen has been used to create the geometry of fabrics for meso-scale textile mechanics modelling. Meshing can either be done directly within TexGen or geometry can be exported to the two most common CAD exchange file formats, IGES and STEP. Alternatively Python scripts can be used to transfer geometry to specific third party applications such as ABAQUS.

Mechanical models of commercial fabrics have been created in which textiles were meshed and then exported to the ABAQUS finite element analysis (FEA) package. Deformations were predicted for fabric unit cells in tension, compression, shear and bending, utilising their measured equivalents for individual yarns as input data. Fig 1 shows a modelled deformed twill weave unit cell in tension, compression, shear and bending. Validations of the FE predictions for the mechanical properties against experimental data are shown in Fig 2.

  • Figure 1. Deformed twill weave unit cell

  • Tension

  • Compression

  • Shear

  • Bending

  • Figure 2. Experimental data versus FE predictions

  • Tension

  • Compression

  • Shear

  • Bending

References

1. Hua Lin, Louise P Brown and Andrew C Long, "Modelling and Simulating Textile Structures using TexGen", Advanced Materials Research Vol. 331 (2011) pp 44-47

2. H. Lin, X. Zeng, M. Sherburn, A. C. Long and M. J. Clifford. "Automated geometric modelling of textile structures", Textile Research Journal, v82, n16, 2012, pp. 1689-1702.

3. H Lin, M J Clifford, A C Long, M Sherburn. “Finite element modelling of fabric shear”, Modelling and Simulation in Materials Science and Engineering, Vol.17, n1, 2009.

4. H. Lin, A.C. Long, M. Sherburn, M. J. Clifford, "Modelling of mechanical behaviour for woven fabrics under combined loading", International Journal of material forming, Spring/ESAFORM 2008.

5. H Lin, M Sherburn, J Crookston, A C Long, M J Clifford, I A Jones. “Finite element modelling of fabric compression”, Modelling and Simulation in Materials Science and Engineering, Vol.16, n3, 2008.

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