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Micro Mechanical Design of Composites  for superior properties
Micro Mechanical Design of Composites  for superior properties
Micro Mechanical Design of Composites  for superior properties
Micro Mechanical Design of Composites  for superior properties
Micro Mechanical Design of Composites  for superior properties
Micro Mechanical Design of Composites  for superior properties
Micro Mechanical Design of Composites  for superior properties
Micro Mechanical Design of Composites  for superior properties
Micro Mechanical Design of Composites  for superior properties
Micro Mechanical Design of Composites  for superior properties
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Micro Mechanical Design of Composites for superior properties

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The predictive engineering of materials is matured from predicting properties from known morphology or constituents to engineering novel morphology for superior properties. The focus of this paper is …

The predictive engineering of materials is matured from predicting properties from known morphology or constituents to engineering novel morphology for superior properties. The focus of this paper is about implementation of computational material mechanics modeling method in COMSOL multiphysics software for engineering the constituents for superior properties. A brief review of property prediction methods, advantages and potential superior properties of composite materials are given. Numerical implementation of representative volume based computational micromechanics in COMSOL with periodic boundary condition is detailed. The prediction methodology and results of linear and nonlinear bulk material properties are provided. The effect of reinforcement shape, size, orientation and length is also investigated and reported with particular emphasis on superior properties. The advantages of windowing approach, COMSOL parametric models, and the ability to investigate materials at micro level for superior macroscopic performance is detailed.

Published in: Design, Business, Technology
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  • 1. Micro Mechanical Exploration ofComposites for Superior PropertiesRaj C Thiagarajan and K V ChiranjeeviATOA Scientific Technologies Pvt Ltd ATOA Scientific Technologies Engineering Simulation For Innovation
  • 2. ATOAST• We Provide Multiphysics Engineering Design Solutions• Driven by Material Unity Vision• We are the first COMSOL Certified Consultant from India• ATOAST JOTHI foundation• www.atoastech.com ATOA Scientific Technologies Pvt Ltd | www.atoastech.com | COMSOL Conference 2011 | SM Micromechanics 2
  • 3. Micro Mechanical Exploration ofComposites for Superior Properties• Composites• Super properties• Micromechanics• Simulation and prediction• Results and Discussion ATOA Scientific Technologies Pvt Ltd | www.atoastech.com | COMSOL Conference 2011 | SM Micromechanics 3
  • 4. Composites• Combination of any two are more materials to perform better than individual constituents.• Macroscopically homogeneous and microscopically heterogeneous.• Recent growth in industrial application of composites. ATOA Scientific Technologies Pvt Ltd | www.atoastech.com | COMSOL Conference 2011 | SM Micromechanics 4
  • 5. After US 7838108Super Properties Normalized Property• Additive• Product• Super Relative Density – Stiff and tough – Super elastic – Ultra low weight Stiffness Nature – Extremal – Nano – Meta Toughness ATOA Scientific Technologies Pvt Ltd | www.atoastech.com | COMSOL Conference 2011 | SM Micromechanics 5
  • 6. Micromechanics• Continuum Micromechanics Localization relationship based on homogenization theory Micro Macro – Aims at finding a volume fields fields elements (Representative Homogenization relationship Volume Element – RVE, periodic Micro field- PMA) response to prescribed mechanical loads. Where, W -volume, G-surface, u(x)– deformation vector – Prediction of macro properties t(x)– surface traction vector nG – surface normal vector from micro structure and constituents. ATOA Scientific Technologies Pvt Ltd | www.atoastech.com | COMSOL Conference 2011 | SM Micromechanics 6
  • 7. Numerical Implementation• Periodic boundary condition • u xl= u x0 + ex • v yl= u y0 + ey• Load – Body force• Global (macro) vs local (micro) stress and strain – Integration of variables• Parametric model to predict the stress strain prediction ATOA Scientific Technologies Pvt Ltd | www.atoastech.com | COMSOL Conference 2011 | SM Micromechanics 7
  • 8. Results and discussion• Isotropic property prediction• Polymer composite property prediction• Macro properties• Micro mechanical exploration ATOA Scientific Technologies Pvt Ltd | www.atoastech.com | COMSOL Conference 2011 | SM Micromechanics 8
  • 9. Results and discussion..• Super property prediction • NPR effects • -1 to 0.5 • Load vs deflection performance Matrix Fibre Composite Elastic Poisson Poissons modulus Predicted % of increase in • 3X improvement in ratio Ratio (GPa) Modulus 0.3 0.2 2.536 0.0 0.3 -0.5 2.576 1.6 performance 0.3 -0.9 2.602 2.6 0.4 0.2 2.762 8.9 -0.4 0.2 2.879 13.5 -0.5 0.2 3.206 26.4 • Internal resistive -0.6 -0.7 0.2 0.2 3.701 4.496 45.9 77.3 -0.8 0.2 5.937 134.1 mechanism due to NPR. -0.9 0.2 9.352 268.7 ATOA Scientific Technologies Pvt Ltd | www.atoastech.com | COMSOL Conference 2011 | SM Micromechanics 9
  • 10. Future work• 2D to Parametric 3D• DoE to predict anisotropic properties.• Extension to Thermal, Acoustical, Electrical, Magnetic, and Transport properties.• Multiphysics Optimization for superior properties ATOA Scientific Technologies Pvt Ltd | www.atoastech.com | COMSOL Conference 2011 | SM Micromechanics 10

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