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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.

  • Mechanical/Automotive/Material science

duration
Domain :

1 month

projectfees
Project Fees :

INR 30,000

Benefits of this Project

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.

What will you do in this project?

Step 1 - Applying boundary conditions to the given geometry

Step 2 - Curve fitting for different hyper-elastic material constants

Step 3 - Post-processing in LS-PrePost

Step 4 - Validation of hyper-elastic material model

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

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In this project, you will learn how to validate the elasto-plastic material model with the given stress-strain data. You will learn the extraction and cleaning of the stress-strain data point from the given curve. Then you will study how to evaluate the hardening curve and give material parameters input to the LS-DYNA software. Finally, you will understand how to extract the stress-strain results from the simulation and compare it with the given data.
duration
Duration:

1 month

domainname
Domain :

Mechanical/Automotive/Material science/Metal forming

Know more
In this project, you will understand modeling of Material LAW-1- Elastic, LAW-2, LAW36 - Elastoplastic, and LAW-27-Brittle along with Johnson-Cook failure in Radioss. You will also understand XFEM formulation to understand the effect of cracking in the model.
duration
Duration:

1 month

domainname
Domain :

Mechanical Engineering , Automotive Engineering , Materials Engineering

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Project Highlights

The project is an advanced level project

Pre-requisites

Work with Multiple Tools

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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.

 

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