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Structural mechanics
Structural mechanics

Practical Simulation of Elastomer Components

From Shore hardness to the Mullins effect


Training Expert

In this training, you will learn how to select and fit appropriate material models as well as to model reinforcements and confined fluids. This training is offered as a 2-day course.

2 days

Basic knowledge of Ansys Mechanical

Software used
Ansys Mechanical

  • You select the right material model for your application
  • Assign the right measurements and adapt material models
  • Increase robustness and accuracy through adaptive remeshing
  • Efficiently simulate confined fluids and fiber reinforcements


O-rings, valves, diaphragms, bearings: many products in mechanical and automotive engineering, aerospace technology and medical technology would be inconceivable without the large, reversible deformability and good dampening properties of elastomers.

In the training course, you will learn how to select suitable materials models for the simulation of static behavior (hyperelasticity), dynamic behavior (viscoelasticity) and damage to elastomers (Mullins effect). We will provide you with the necessary knowledge to assign the right measurements and to adapt your chosen model with the help of the measurement results. This way you will improve the robustness and accuracy of your Ansys analysis for components. Knowledge of efficient simulation of confined fluids and fiber-reinforced elastomer components rounds off this multifaceted course.

This training course is aimed at computational engineers and designers who want to know more about the simulation of elastomers.

Detailed agenda for this 2-day training

Day 1

01 Simulation of elastomer components

  • Properties of elastomers
  • Overview of available material models
  • Simulation methodology for elastomer components
  • Correct evaluation of large strains
  • Demonstrator: calculation of the characteristic curve of an air spring
  • Workshop: compression of an O-ring

02 Hyperelastic material models

  • Fundamentals of continuum mechanics
  • Strain energy functions: Neo Hooke, Mooney-Rivlin, Yeoh, Ogden and others
  • Optimal element settings at volume constancy (u-p formulation)
  • Workshop: Convergence analysis on a keyboard stroke

03 Viscoelastic effects

  • Fundamentals of the Prony series
  • Time domain: relaxation
  • Frequency domain: dynamic hardening
  • Time-temperature shift principle: WLF and TN shift function
  • Workshop: stress relaxation in a press fit

04 Systematic material characterization

  • Estimation of the shear modulus from the Shore hardness and example parameter sets
  • Derivation of component-oriented test conditions with the invariant diagram
  • Standard tests for hyperelastic and viscoelastic materials
  • Curve-fitting in Ansys Workbench
  • Workshop 1: fitting hyperelastic models to test data with Ansys Workbench
  • Workshop 2: fitting of Prony series to relaxation tests with Ansys Workbench

Day 2

05 Damage and cyclic material behavior

  • Phenomenology: damage (Mullins effect) and cyclic stress-strain behavior (nonlinear viscoelasticity) of elastomers
  • Ogden-Roxburgh model (Mullins effect)
  • Bergström-Boyce model (nonlinear viscoelasticity)
  • Demonstrator: parameter identification of the Ogden-Roxburgh model with Ansys optiSLang
  • Workshop: Cyclic torsion of a suspension bushing with the Bergström-Boyce model

06 Modeling of fiber reinforced elastomers

  • Short fiber reinforcement: anisotropic hyperelasticity using structural tensors
  • Continuous fiber reinforcement: Reinforce elements (REINF)
  • Workshop: maximum transmittable moment of a V-belt

07 Modeling of confined fluids

  • Examples of fluid-structure interactions
  • Hydrostatic fluid elements (HSFLD)
  • Fluid models: incompressible and compressible fluids, ideal gases
  • Definition in Ansys Mechanical and postprocessing
  • Workshop: dependence of the stiffness of a rubber ball on air pressure

08 Adaptive Remeshing (NLAD)

  • Procedure of an analysis with remeshing
  • Criteria: when to remesh?
  • Settings: how is remeshing done?
  • Recommended remeshing settings
  • Workshop: remeshing of an O-ring under operating load

Your Trainers

Dr.-Ing. Hendrik Donner
CAE Engineer, CADFEM Germany GmbH, Chemnitz
Prof. Dr.-Ing. Armin Fritsch
Professor of Structural Mechanics, Munich University of Applied Sciences

Placement in the CADFEM Learning Pathway

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What CADFEM customers are saying

Benjamin Höfer
Bürkert Werke GmbH & Co. KG

Very good training on the simulation of elastomers with many practical tips! The highly knowledgeable instructor provided good insights into all relevant topics without delving too deeply into hyperelasticity theory.

Do you have questions on the training?

When will I receive the final confirmation for my training booking?

Straight after you sign up, an automatic confirmation of receipt will be sent to the email addresses you provided. Once you have successfully verified the data you provided, you will receive your personalized sign-up confirmation, containing further information on course fees, the billing address, etc., by email within two to three working days.  

As soon as the minimum number of attendees has been reached, you will receive a final training confirmation containing further information. If you have booked an on-site training, we recommend that you wait until you have received this final confirmation before booking your travel and accommodation.

If the minimum number of attendees is not reached, we reserve the right to cancel the training seven days before it is due to start at the latest. We are happy to inform you on changing your booking to an alternative date. Please note that we accept no liability for hotel or travel bookings that attendees have already made.

When is the sign-up deadline for a training?

Training places will generally be allocated based on the order in which attendees sign up. For this reason, we always recommend booking for your desired date as early as possible.

As long as a coures still has free places, it can be booked.

At what time do the training courses begin and end?

Usually the training courses start at 9:00 am and end at 5:00 pm of the respective local time. The actual course times will be stated in the booking confirmation. Please note that, depending on the training host, there may be a possible time shift between your and the provider's local time. Therefore all local times are provided with the valid time shift to Greenwich Mean Time (GMT). 

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