Hyperelastic material modelling and validation using LS-DYNA

Understand how to perform a tensile test to calculate the Mooney Rivlin and Ogden material parameters and compare it with the given stress-strain data. Learn how to use hyper-elastic material card and give particular inputs for simulation. Study and understand conversions from engineering stress-strain to true stress-strain and terms like stretch ratio and extension. Finally, understand curve fitting and compare the simulation and given stress-strain data.

  • Duration : 1 Month
  • Domain : MECHANICAL/AUTOMOTIVE/MATERIAL SCIENCE
  • Benefits : Understand how to perform a tensile test to calculate the Mooney Rivlin and Ogden material parameters and compare it with the given stress-strain data. Learn how to use hyper-elastic material card and give particular inputs for simulation. Study and understand conversions from engineering stress-strain to true stress-strain and terms like stretch ratio and extension. Finally, understand curve fitting and compare the simulation and given stress-strain data.
  • Price : 30000
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What will you do in this project?

You will be performing a tensile test on a dogbone specimen to validate the hyper-elastic material model. You will do the following in this project,

  • Input experimental stress-strain data through hyper-elastic material card
  • Set-up a tensile test case study by applying required boundary conditions in LS-PrePost
  • Evaluate the fitted curves for various number of constants for the hyper-elastic material model 
  • Tensile test simulation using the obtained constants and result extraction 
  • Analyse and compare the stress-strain results with the given data

  • Understand how to give inputs for hyper-elastic material models
  • Define boundary conditions and run the simulation
  • Grasp how to evaluate and compare the fitted stress-strain curve through d3hsp file
  • Extract the results and validate your model with the experimental data

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Project Highlights

The project is an advanced level project
  • This project is beneficial to B.E./M.Tech/M.S students from mechanical, automotive and material science background
  • Helpful for working professionals in understanding hyper-elastic material modelling in FEA software
Pre-requisites
  • Basic knowledge of finite element analysis
  • Basic knowledge of hyper-elastic materials
  • Good knowledge of LS-DYNA and LS-PrePost



Work with Multiple Tools
  • Preprocessing and postprocessing in LS-PrePost
  • Curve fitting using extension and true stress data through d3hsp file
  • Simulating a tensile test in LS-DYNA software
  • Plotting results in MATLAB/Excel and writing report in MS-Word or Google-Doc

Hyper-elastic material modelling and validation using LS-DYNA

In this project, you will simulate a tensile test on a given dogbone specimen to validate the hyper-elastic material model in LS-DYNA. The experimental stress-strain data is given and is used as an input which defines the uniaxial stress-strain behaviour. understand how to give all boundary conditions for a tensile test and set up an error-free input file for the solver. Finally, run the simulation using this input file using the launch manager. Understand conversions from engineering stress-strain curve to true stress-strain curve and terms like stretch/extension. Post-processing would be carried out in LS-PrePost and simulated results would be compared to validate the material model.

 

  • Curve fitting using obtained hyper-elastic material parameters
  • Set up the tensile test case by defining boundary conditions and material properties
  • Perform post-processing in Ls-PrePost and compare graphs in MATLAB/excel
  • Compare the simulated results with the experiment and validate the material model

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Frequently Asked Questions

1How is this project going to help me?

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2Can I add this project in my resume?

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3What are the pre-requisites for this project?

  • A few premium projects might require a prior understanding of fundamental concepts
  • In such a case, you will be given access to appropriate learning materials to first learn those concepts before jumping to the project


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