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  1. Welcome to PolymerFEM.com!
    • Our Forum contains thousands of questions and answers related to finite element modeling of polymers. Note that you have to register before you can post.
    • If you ever need to calibrate a material model, or just want to learn more about different material models, then check out our smart material modeling software called MCalibration. You can even download a free (limited) version of the software.

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    Upcoming Class: Advanced FEA of Polymers (May 8-9, 2013) 

    by
    Jorgen
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    Published on 2013-04-13 04:19

    This web-based class is an extension of my introductory polymer modeling training class. The class includes a more in depth review of the theory of different material models, and contains hands-on exercises designed to teach how to use the different material models to quickly and accurately solve real problems.

    The class will take place on May 8 and 9, 2013. See the following page for more info.

    Contact us soon if you want to register!

    Polymer Testing and Modeling Classes 2013 

    by
    Jorgen
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    Published on 2012-01-08 21:53

    The schedule for our 2013 training classes is now available. The classes cover the following topics: polymer mechanics, experimental testing, material model selection, and advanced finite element modeling techniques.
    The next class is a web-based class taking place on May 8-9, 2013.
    Both online (web-based) and in-person (classroom-style) training classes are available. The training classes are targeted to people with an interest in learning the state of the art in testing and analyzing the mechanical performance of parts made from plastics, rubbers, thermosets, or other types of polymers.

    New PolyUMod.com Website 

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    Jorgen
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    Published on 2013-04-13 04:42

    We have just created a new website specifically for the PolyUMod library of material model. The new website, PolyUMod.com, contains lots of information about how to accurately perform Test-Calibrate-Simulate workflows using the PolyUMod library of advanced user-material models for Abaqus, ANSYS and other non-linear FE solvers.

    We encourage everyone who is interested in accurate FE simulations of polymers and rubbers to checkout PolyUMod.com!

    ANSYS 14.5 and PolyUMod 

    by
    Jorgen
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    Published on 2011-12-15 06:52
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    ANSYS version 14.5 was recently released and it seems like it contains a large number of nice improvements. I am also happy to announce that the current version of the PolyUMod library works great also with this new version of ANSYS.

    A new version of the PolyUMod library has also been released. This new version (2.2.5) contains numerous improvements to both the MCalibration software and the PolyUMod library. For example, MCalibration can now calibrate any of the built-in material models in ANSYS Mechanical.
    ...
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    MCalibration: How to calibrate a material model using both DMA and stress-strain data 

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    Jorgen
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    Published on 2011-10-30 20:02

    Here is a tutorial on how to use MCalibration to simultaneously calibrate a material model to both traditional stress-strain data, and dynamic storage modulus (E') and loss modulus data (E''). The attached pdf-file and MCalibration files contain all the details.
    One of the most useful features of MCalibration is the ability to calibrate a material model simultaneously using many different types of experimental data.

    MCalibration Movie Demo 

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    Jorgen
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    Published on 2010-09-07 22:25


    I created a short movie that demonstrates the MCalibration software. If you ever need to calibrate a material model for use with Abaqus, ANSYS, or LS-DYNA, then you should check out MCalibration. This software can calibrate all user-material models in the PolyUMod library, and also all built-in material models in Abaqus.
    ...
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    FEA of PLLA Interference Screws 

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    Jorgen
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    Published on 2011-08-22 13:55

    I gave a presentation on advanced FE modeling of PLLA intereference screws at the ANSYS User's conference in Boston on Sep 14, 2011. In my presentation I discussed how the design of degradable screws can be optimized for use in Anterior cruciate ligament (ACL) reconstruction surgery. PLLA is a non-linear viscoplastic material that can be accurately modeled using the PolyUMod library.
    4 Comments

    Experimental Data Files for Various Polymers 

    by
    Jorgen
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    Published on 2010-03-12 19:45

    If you are looking for free, high quality experimental data for various polymers, then you might be interested in learning that you can download and use the experimental data from the following links:
    • ABR
    • Chloroprene Rubber (7 vol% carbon black)
    • Chloroprene Rubber (25 vol% carbon black)
    • Nitrile rubber
    • PTFE
    • Silicone rubber
    • Viton

    Also note that I provide experimental testing services for all kinds of polymers through Veryst Engineering. Send me a private message if you are interested in having your material tested and a suitable material model calibrated.
    11 Comments

    MCalibration: How to activate a failure model 

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    Jorgen
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    Published on 2012-03-01 10:08

    This tutorial shows how to activate a failure model with any of the PolyUMod material models. The attached pdf-file and MCalibration files contain all the details. Using a failure model allows for element deletion in Abaqus/Explicit once a critical stress or strain condition is reached.

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  • About PolymerFEM

    The PolymerFEM web site was created by Dr. Jorgen Bergstrom of Veryst Engineering. The goal of this site is to become a useful reference for anyone interested in experimental testing, material modeling, and accurate finite element simulations of all types of polymers. (more info...)
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